/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-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:14:45,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:14:45,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:14:45,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:14:45,760 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 [2021-08-06 14:14:45,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:14:45,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:14:45,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:14:45,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:14:45,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:14:45,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:14:45,813 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:14:45,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:14:45,813 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:14:45,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:14:45,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:14:45,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:14:45,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:14:45,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:14:45,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:14:45,814 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:14:45,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:14:45,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:14:45,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:14:45,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:14:45,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:14:45,815 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:14:45,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:14:45,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:14:45,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:14:45,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:14:45,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:14:45,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:14:45,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:14:45,816 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:14:45,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:14:45,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:14:46,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:14:46,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:14:46,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:14:46,176 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:14:46,177 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:14:46,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-08-06 14:14:46,178 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-08-06 14:14:46,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:14:46,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:14:46,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:14:46,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:14:46,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:14:46,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:14:46,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:14:46,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:14:46,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:14:46,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:14:46,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:14:46,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:14:46,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:14:46,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/1) ... [2021-08-06 14:14:46,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:14:46,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:46,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 14:14:46,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 14:14:46,391 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:14:46,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:14:46,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:14:46,392 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:14:46,392 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:14:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:14:46,392 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:14:46,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:14:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:14:46,393 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 14:14:46,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:14:46,741 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-06 14:14:46,742 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 14:14:46,742 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 14:14:46,744 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:14:46 BoogieIcfgContainer [2021-08-06 14:14:46,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:14:46,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:14:46,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:14:46,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:14:46,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:14:46" (1/2) ... [2021-08-06 14:14:46,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c82048 and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:14:46, skipping insertion in model container [2021-08-06 14:14:46,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:14:46" (2/2) ... [2021-08-06 14:14:46,749 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-08-06 14:14:46,753 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:14:46,753 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:14:46,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:14:46,754 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:14:46,834 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 14:14:46,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:14:46,949 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 14:14:46,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 14:14:46,961 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-08-06 14:14:46,986 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) [2021-08-06 14:14:46,988 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) [2021-08-06 14:14:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-06 14:14:47,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:47,009 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:47,010 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:47,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:47,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1674208439, now seen corresponding path program 1 times [2021-08-06 14:14:47,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:47,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187013226] [2021-08-06 14:14:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:47,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:47,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187013226] [2021-08-06 14:14:47,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187013226] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:14:47,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:14:47,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 14:14:47,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858762071] [2021-08-06 14:14:47,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:14:47,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:47,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:14:47,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:14:47,320 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) [2021-08-06 14:14:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:47,378 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-08-06 14:14:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:14:47,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-06 14:14:47,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:47,392 INFO L225 Difference]: With dead ends: 22 [2021-08-06 14:14:47,392 INFO L226 Difference]: Without dead ends: 19 [2021-08-06 14:14:47,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:14:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-06 14:14:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-06 14:14:47,424 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) [2021-08-06 14:14:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-08-06 14:14:47,426 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-08-06 14:14:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:47,427 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-08-06 14:14:47,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-08-06 14:14:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 14:14:47,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:47,428 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:47,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:14:47,429 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash 361579940, now seen corresponding path program 1 times [2021-08-06 14:14:47,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:47,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806105457] [2021-08-06 14:14:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:47,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:47,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:47,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806105457] [2021-08-06 14:14:47,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806105457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:14:47,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:14:47,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:14:47,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870771687] [2021-08-06 14:14:47,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:14:47,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:47,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:14:47,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:14:47,473 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) [2021-08-06 14:14:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:47,520 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2021-08-06 14:14:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:14:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-06 14:14:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:47,522 INFO L225 Difference]: With dead ends: 19 [2021-08-06 14:14:47,522 INFO L226 Difference]: Without dead ends: 15 [2021-08-06 14:14:47,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:14:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-06 14:14:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-06 14:14:47,525 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) [2021-08-06 14:14:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2021-08-06 14:14:47,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 10 [2021-08-06 14:14:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:47,526 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 25 transitions. [2021-08-06 14:14:47,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 25 transitions. [2021-08-06 14:14:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 14:14:47,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:47,527 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:47,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:14:47,528 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:47,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1024668018, now seen corresponding path program 1 times [2021-08-06 14:14:47,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:47,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395577229] [2021-08-06 14:14:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:47,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:47,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:47,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395577229] [2021-08-06 14:14:47,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395577229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:47,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372360642] [2021-08-06 14:14:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:47,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:47,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:47,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:47,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 14:14:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:47,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 14:14:47,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:47,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372360642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:47,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:47,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-06 14:14:47,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147372865] [2021-08-06 14:14:47,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:14:47,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:14:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:14:47,810 INFO L87 Difference]: Start difference. First operand 15 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:47,849 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2021-08-06 14:14:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:14:47,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-06 14:14:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:47,851 INFO L225 Difference]: With dead ends: 18 [2021-08-06 14:14:47,851 INFO L226 Difference]: Without dead ends: 18 [2021-08-06 14:14:47,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:14:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-06 14:14:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-06 14:14:47,857 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) [2021-08-06 14:14:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-08-06 14:14:47,858 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-08-06 14:14:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:47,858 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-08-06 14:14:47,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-08-06 14:14:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 14:14:47,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:47,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:47,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:48,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:48,084 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:48,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1495291916, now seen corresponding path program 2 times [2021-08-06 14:14:48,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:48,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180958483] [2021-08-06 14:14:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:48,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:48,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:48,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180958483] [2021-08-06 14:14:48,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180958483] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:14:48,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:14:48,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:14:48,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977320008] [2021-08-06 14:14:48,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:14:48,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:14:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:14:48,169 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) [2021-08-06 14:14:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:48,210 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-08-06 14:14:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:14:48,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-06 14:14:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:48,211 INFO L225 Difference]: With dead ends: 20 [2021-08-06 14:14:48,211 INFO L226 Difference]: Without dead ends: 20 [2021-08-06 14:14:48,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:14:48,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-06 14:14:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-06 14:14:48,217 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) [2021-08-06 14:14:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-08-06 14:14:48,219 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-08-06 14:14:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:48,219 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-08-06 14:14:48,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-08-06 14:14:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:14:48,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:48,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:48,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:14:48,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:48,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1700663369, now seen corresponding path program 1 times [2021-08-06 14:14:48,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:48,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244796322] [2021-08-06 14:14:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:48,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:48,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:48,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244796322] [2021-08-06 14:14:48,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244796322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:48,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142912294] [2021-08-06 14:14:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:48,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:48,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:48,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:48,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 14:14:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:48,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:14:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:48,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142912294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:48,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:48,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-06 14:14:48,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584559035] [2021-08-06 14:14:48,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:14:48,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:14:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:14:48,463 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) [2021-08-06 14:14:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:48,482 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-08-06 14:14:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:14:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:14:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:48,483 INFO L225 Difference]: With dead ends: 24 [2021-08-06 14:14:48,484 INFO L226 Difference]: Without dead ends: 24 [2021-08-06 14:14:48,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:14:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-06 14:14:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-06 14:14:48,491 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) [2021-08-06 14:14:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-08-06 14:14:48,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-08-06 14:14:48,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:48,492 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-08-06 14:14:48,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-08-06 14:14:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 14:14:48,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:48,493 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:48,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:48,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:48,711 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:48,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:48,712 INFO L82 PathProgramCache]: Analyzing trace with hash 262576708, now seen corresponding path program 2 times [2021-08-06 14:14:48,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:48,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387614082] [2021-08-06 14:14:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:48,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:48,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:48,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387614082] [2021-08-06 14:14:48,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387614082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:48,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180306989] [2021-08-06 14:14:48,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:14:48,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:48,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:48,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 14:14:48,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:14:48,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:48,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:14:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:49,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180306989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:49,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:49,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-06 14:14:49,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102946900] [2021-08-06 14:14:49,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:14:49,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:14:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:14:49,022 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:49,056 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-08-06 14:14:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:14:49,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 14:14:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:49,057 INFO L225 Difference]: With dead ends: 28 [2021-08-06 14:14:49,057 INFO L226 Difference]: Without dead ends: 28 [2021-08-06 14:14:49,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:14:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-06 14:14:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-06 14:14:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-08-06 14:14:49,064 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-08-06 14:14:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:49,064 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-08-06 14:14:49,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-08-06 14:14:49,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:14:49,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:49,065 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:49,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:49,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:49,277 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1368436823, now seen corresponding path program 3 times [2021-08-06 14:14:49,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:49,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158981919] [2021-08-06 14:14:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:49,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:49,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:49,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158981919] [2021-08-06 14:14:49,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158981919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:49,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138899572] [2021-08-06 14:14:49,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:14:49,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:49,409 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:49,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 14:14:49,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:14:49,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:49,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:14:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:49,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138899572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:49,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:49,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 14:14:49,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284331043] [2021-08-06 14:14:49,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:14:49,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:14:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:14:49,625 INFO L87 Difference]: Start difference. First operand 28 states and 51 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) [2021-08-06 14:14:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:49,687 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-08-06 14:14:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:14:49,687 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 13 [2021-08-06 14:14:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:49,691 INFO L225 Difference]: With dead ends: 32 [2021-08-06 14:14:49,691 INFO L226 Difference]: Without dead ends: 32 [2021-08-06 14:14:49,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:14:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-06 14:14:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-06 14:14:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-08-06 14:14:49,699 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-08-06 14:14:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:49,699 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-08-06 14:14:49,699 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) [2021-08-06 14:14:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-08-06 14:14:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:14:49,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:49,700 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:49,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:49,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:49,921 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash -390248732, now seen corresponding path program 4 times [2021-08-06 14:14:49,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:49,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716017543] [2021-08-06 14:14:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:49,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:50,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:50,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716017543] [2021-08-06 14:14:50,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716017543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:50,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355799765] [2021-08-06 14:14:50,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:14:50,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:50,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:50,378 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:50,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 14:14:50,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:14:50,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:50,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:14:50,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:50,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355799765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:50,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:50,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 14:14:50,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701724977] [2021-08-06 14:14:50,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:14:50,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:14:50,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:14:50,638 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:50,687 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-08-06 14:14:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:14:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:14:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:50,689 INFO L225 Difference]: With dead ends: 36 [2021-08-06 14:14:50,690 INFO L226 Difference]: Without dead ends: 36 [2021-08-06 14:14:50,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:14:50,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-06 14:14:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-06 14:14:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-08-06 14:14:50,699 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-08-06 14:14:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:50,699 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-08-06 14:14:50,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-08-06 14:14:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:14:50,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:50,700 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:50,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:50,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:50,918 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash -131188983, now seen corresponding path program 5 times [2021-08-06 14:14:50,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:50,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151236330] [2021-08-06 14:14:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:50,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:51,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:51,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151236330] [2021-08-06 14:14:51,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151236330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:51,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520276768] [2021-08-06 14:14:51,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:14:51,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:51,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:51,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:51,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 14:14:51,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:14:51,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:51,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:14:51,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:51,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:14:51,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-06 14:14:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:52,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520276768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:52,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:52,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 14:14:52,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040648433] [2021-08-06 14:14:52,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:14:52,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:14:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:52,219 INFO L87 Difference]: Start difference. First operand 36 states and 67 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) [2021-08-06 14:14:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:52,346 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-08-06 14:14:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:14:52,346 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 15 [2021-08-06 14:14:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:52,347 INFO L225 Difference]: With dead ends: 93 [2021-08-06 14:14:52,347 INFO L226 Difference]: Without dead ends: 90 [2021-08-06 14:14:52,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-06 14:14:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-08-06 14:14:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-08-06 14:14:52,352 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-08-06 14:14:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:52,352 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-08-06 14:14:52,353 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) [2021-08-06 14:14:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-08-06 14:14:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:14:52,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:52,353 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:52,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-06 14:14:52,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:52,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash -277447531, now seen corresponding path program 6 times [2021-08-06 14:14:52,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:52,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666355799] [2021-08-06 14:14:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:52,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:52,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:52,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666355799] [2021-08-06 14:14:52,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666355799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:52,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331324926] [2021-08-06 14:14:52,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:14:52,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:52,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:52,691 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:52,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 14:14:52,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:14:52,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:14:52,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:52,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:14:52,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-06 14:14:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:53,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331324926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:53,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:53,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 14:14:53,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716324790] [2021-08-06 14:14:53,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:14:53,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:14:53,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:53,202 INFO L87 Difference]: Start difference. First operand 49 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:53,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:53,340 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-08-06 14:14:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:14:53,340 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 15 [2021-08-06 14:14:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:53,342 INFO L225 Difference]: With dead ends: 103 [2021-08-06 14:14:53,342 INFO L226 Difference]: Without dead ends: 100 [2021-08-06 14:14:53,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-06 14:14:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-08-06 14:14:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:53,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-08-06 14:14:53,359 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-08-06 14:14:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:53,359 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-08-06 14:14:53,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-08-06 14:14:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:14:53,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:53,360 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:53,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:53,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:53,577 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:53,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1211957465, now seen corresponding path program 7 times [2021-08-06 14:14:53,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:53,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407973779] [2021-08-06 14:14:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:53,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:53,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:53,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407973779] [2021-08-06 14:14:53,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407973779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:53,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707387280] [2021-08-06 14:14:53,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:14:53,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:53,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:53,733 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:53,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 14:14:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:53,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:14:53,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:54,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:14:54,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-06 14:14:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:54,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707387280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:54,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:54,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 14:14:54,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827829583] [2021-08-06 14:14:54,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:14:54,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:54,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:14:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:54,388 INFO L87 Difference]: Start difference. First operand 57 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:54,464 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-08-06 14:14:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:14:54,464 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 15 [2021-08-06 14:14:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:54,465 INFO L225 Difference]: With dead ends: 113 [2021-08-06 14:14:54,465 INFO L226 Difference]: Without dead ends: 110 [2021-08-06 14:14:54,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:54,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-06 14:14:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-08-06 14:14:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-08-06 14:14:54,484 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-08-06 14:14:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:54,484 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-08-06 14:14:54,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-08-06 14:14:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:14:54,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:54,485 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:54,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:54,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 14:14:54,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash 138872085, now seen corresponding path program 8 times [2021-08-06 14:14:54,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:54,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072237490] [2021-08-06 14:14:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:54,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:54,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:54,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072237490] [2021-08-06 14:14:54,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072237490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:54,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319554451] [2021-08-06 14:14:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:14:54,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:54,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:54,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 14:14:54,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:14:54,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:14:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:55,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:14:55,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-06 14:14:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:55,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319554451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:55,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:55,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 14:14:55,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701005614] [2021-08-06 14:14:55,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:14:55,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:55,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:14:55,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:55,891 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:56,022 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-08-06 14:14:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:14:56,022 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 15 [2021-08-06 14:14:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:56,023 INFO L225 Difference]: With dead ends: 124 [2021-08-06 14:14:56,023 INFO L226 Difference]: Without dead ends: 121 [2021-08-06 14:14:56,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-06 14:14:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-08-06 14:14:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-08-06 14:14:56,028 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-08-06 14:14:56,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:56,028 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-08-06 14:14:56,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-08-06 14:14:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:14:56,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:56,030 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:56,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:56,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:56,237 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:56,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:56,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1232963673, now seen corresponding path program 9 times [2021-08-06 14:14:56,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:56,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104356234] [2021-08-06 14:14:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:56,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:56,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:56,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104356234] [2021-08-06 14:14:56,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104356234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:56,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022237854] [2021-08-06 14:14:56,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:14:56,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:56,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:56,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:56,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 14:14:56,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:14:56,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:14:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:56,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:14:56,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-06 14:14:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:57,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022237854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:57,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:57,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 14:14:57,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919220102] [2021-08-06 14:14:57,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:14:57,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:57,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:14:57,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:57,165 INFO L87 Difference]: Start difference. First operand 76 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:57,273 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-08-06 14:14:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:14:57,273 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 15 [2021-08-06 14:14:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:57,275 INFO L225 Difference]: With dead ends: 136 [2021-08-06 14:14:57,275 INFO L226 Difference]: Without dead ends: 133 [2021-08-06 14:14:57,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-06 14:14:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-08-06 14:14:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-08-06 14:14:57,292 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-08-06 14:14:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:57,293 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-08-06 14:14:57,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:57,293 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-08-06 14:14:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:14:57,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:57,297 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:57,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:57,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 14:14:57,517 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:57,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash 790064533, now seen corresponding path program 10 times [2021-08-06 14:14:57,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:57,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261537287] [2021-08-06 14:14:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:57,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:57,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:57,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261537287] [2021-08-06 14:14:57,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261537287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:57,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572297674] [2021-08-06 14:14:57,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:14:57,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:57,658 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:57,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 14:14:57,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:14:57,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:57,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:14:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:58,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:14:58,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-06 14:14:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:58,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572297674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:58,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:58,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 14:14:58,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180972645] [2021-08-06 14:14:58,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:14:58,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:14:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:58,553 INFO L87 Difference]: Start difference. First operand 87 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:58,651 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-08-06 14:14:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:14:58,651 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 15 [2021-08-06 14:14:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:58,652 INFO L225 Difference]: With dead ends: 149 [2021-08-06 14:14:58,652 INFO L226 Difference]: Without dead ends: 146 [2021-08-06 14:14:58,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:58,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-06 14:14:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-08-06 14:14:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-08-06 14:14:58,656 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-08-06 14:14:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:58,656 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-08-06 14:14:58,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-08-06 14:14:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:14:58,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:58,657 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:58,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:58,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 14:14:58,881 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash 228834706, now seen corresponding path program 11 times [2021-08-06 14:14:58,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:58,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702122528] [2021-08-06 14:14:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:58,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:58,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:58,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702122528] [2021-08-06 14:14:58,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702122528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:58,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466285620] [2021-08-06 14:14:58,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:14:59,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:59,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:59,000 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:59,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 14:14:59,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:14:59,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:14:59,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:59,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466285620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:59,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:59,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:14:59,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133188946] [2021-08-06 14:14:59,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:14:59,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:59,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:14:59,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:14:59,305 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:59,506 INFO L93 Difference]: Finished difference Result 201 states and 451 transitions. [2021-08-06 14:14:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:14:59,507 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 [2021-08-06 14:14:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:59,510 INFO L225 Difference]: With dead ends: 201 [2021-08-06 14:14:59,510 INFO L226 Difference]: Without dead ends: 196 [2021-08-06 14:14:59,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:14:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-06 14:14:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 117. [2021-08-06 14:14:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.8879310344827585) internal successors, (335), 116 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 335 transitions. [2021-08-06 14:14:59,528 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 335 transitions. Word has length 16 [2021-08-06 14:14:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:59,529 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 335 transitions. [2021-08-06 14:14:59,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 335 transitions. [2021-08-06 14:14:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:14:59,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:59,530 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:59,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:59,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 14:14:59,749 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:59,749 INFO L82 PathProgramCache]: Analyzing trace with hash -690271356, now seen corresponding path program 12 times [2021-08-06 14:14:59,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:59,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110306857] [2021-08-06 14:14:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:59,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:59,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:59,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110306857] [2021-08-06 14:14:59,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110306857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:59,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083531655] [2021-08-06 14:14:59,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:14:59,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:59,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:59,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:59,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 14:15:00,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:15:00,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:00,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:00,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:00,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083531655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:00,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:00,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:00,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069234164] [2021-08-06 14:15:00,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:00,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:00,179 INFO L87 Difference]: Start difference. First operand 117 states and 335 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:00,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:00,323 INFO L93 Difference]: Finished difference Result 194 states and 437 transitions. [2021-08-06 14:15:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:15:00,323 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 [2021-08-06 14:15:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:00,324 INFO L225 Difference]: With dead ends: 194 [2021-08-06 14:15:00,324 INFO L226 Difference]: Without dead ends: 192 [2021-08-06 14:15:00,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:15:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-06 14:15:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2021-08-06 14:15:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-08-06 14:15:00,330 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-08-06 14:15:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:00,330 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-08-06 14:15:00,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-08-06 14:15:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:00,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:00,331 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:00,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-06 14:15:00,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 14:15:00,549 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash 72393506, now seen corresponding path program 13 times [2021-08-06 14:15:00,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:00,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809493037] [2021-08-06 14:15:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:00,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:00,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:00,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809493037] [2021-08-06 14:15:00,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809493037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:00,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910557858] [2021-08-06 14:15:00,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:00,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:00,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:00,663 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:00,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 14:15:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:00,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:01,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910557858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:01,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:01,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:01,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779919305] [2021-08-06 14:15:01,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:01,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:01,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:01,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:01,015 INFO L87 Difference]: Start difference. First operand 125 states and 352 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) [2021-08-06 14:15:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:01,115 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-08-06 14:15:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:01,115 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 [2021-08-06 14:15:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:01,116 INFO L225 Difference]: With dead ends: 152 [2021-08-06 14:15:01,116 INFO L226 Difference]: Without dead ends: 151 [2021-08-06 14:15:01,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-06 14:15:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-08-06 14:15:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-08-06 14:15:01,121 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-08-06 14:15:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:01,121 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-08-06 14:15:01,121 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) [2021-08-06 14:15:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-08-06 14:15:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:01,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:01,122 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:01,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:01,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:01,329 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:01,330 INFO L82 PathProgramCache]: Analyzing trace with hash 938477458, now seen corresponding path program 14 times [2021-08-06 14:15:01,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:01,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385937387] [2021-08-06 14:15:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:01,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:01,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:01,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385937387] [2021-08-06 14:15:01,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385937387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:01,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830790855] [2021-08-06 14:15:01,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:01,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:01,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:01,403 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:01,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 14:15:01,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:01,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:01,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:01,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:01,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830790855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:01,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:01,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:01,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125880800] [2021-08-06 14:15:01,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:01,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:01,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:01,670 INFO L87 Difference]: Start difference. First operand 126 states and 352 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) [2021-08-06 14:15:01,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:01,728 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-08-06 14:15:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:01,728 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 [2021-08-06 14:15:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:01,729 INFO L225 Difference]: With dead ends: 214 [2021-08-06 14:15:01,729 INFO L226 Difference]: Without dead ends: 214 [2021-08-06 14:15:01,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:01,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-06 14:15:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-08-06 14:15:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-08-06 14:15:01,735 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-08-06 14:15:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:01,736 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-08-06 14:15:01,736 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) [2021-08-06 14:15:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-08-06 14:15:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:01,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:01,738 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:01,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:01,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 14:15:01,939 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash -10212986, now seen corresponding path program 15 times [2021-08-06 14:15:01,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:01,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177680516] [2021-08-06 14:15:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:01,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:02,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:02,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177680516] [2021-08-06 14:15:02,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177680516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:02,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296057545] [2021-08-06 14:15:02,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:02,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:02,033 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:02,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 14:15:02,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:15:02,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:02,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:02,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:02,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296057545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:02,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:02,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:02,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030049658] [2021-08-06 14:15:02,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:02,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:02,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:02,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:02,331 INFO L87 Difference]: Start difference. First operand 126 states and 352 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) [2021-08-06 14:15:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:02,448 INFO L93 Difference]: Finished difference Result 219 states and 493 transitions. [2021-08-06 14:15:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:02,448 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 [2021-08-06 14:15:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:02,449 INFO L225 Difference]: With dead ends: 219 [2021-08-06 14:15:02,449 INFO L226 Difference]: Without dead ends: 217 [2021-08-06 14:15:02,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-06 14:15:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 133. [2021-08-06 14:15:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8636363636363638) internal successors, (378), 132 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 378 transitions. [2021-08-06 14:15:02,454 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 378 transitions. Word has length 16 [2021-08-06 14:15:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:02,454 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 378 transitions. [2021-08-06 14:15:02,454 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) [2021-08-06 14:15:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 378 transitions. [2021-08-06 14:15:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:02,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:02,455 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:02,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:02,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:02,669 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash 652875092, now seen corresponding path program 16 times [2021-08-06 14:15:02,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:02,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154543200] [2021-08-06 14:15:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:02,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:02,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:02,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154543200] [2021-08-06 14:15:02,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154543200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:02,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238378643] [2021-08-06 14:15:02,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:02,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:02,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:02,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:02,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 14:15:02,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:02,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:02,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:02,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238378643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:02,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:02,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:02,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543282485] [2021-08-06 14:15:02,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:02,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:02,996 INFO L87 Difference]: Start difference. First operand 133 states and 378 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) [2021-08-06 14:15:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:03,092 INFO L93 Difference]: Finished difference Result 218 states and 498 transitions. [2021-08-06 14:15:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:15:03,093 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 [2021-08-06 14:15:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:03,094 INFO L225 Difference]: With dead ends: 218 [2021-08-06 14:15:03,094 INFO L226 Difference]: Without dead ends: 218 [2021-08-06 14:15:03,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-06 14:15:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 139. [2021-08-06 14:15:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-08-06 14:15:03,100 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-08-06 14:15:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:03,100 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-08-06 14:15:03,100 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) [2021-08-06 14:15:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-08-06 14:15:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:03,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:03,101 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:03,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:03,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:03,317 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1561798502, now seen corresponding path program 17 times [2021-08-06 14:15:03,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:03,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864470600] [2021-08-06 14:15:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:03,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:03,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:03,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864470600] [2021-08-06 14:15:03,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864470600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:03,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220153409] [2021-08-06 14:15:03,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:03,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:03,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:03,399 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:03,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 14:15:03,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:15:03,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:03,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:03,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:03,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220153409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:03,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:03,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:03,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666353318] [2021-08-06 14:15:03,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:03,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:03,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:03,745 INFO L87 Difference]: Start difference. First operand 139 states and 394 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) [2021-08-06 14:15:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:03,886 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-08-06 14:15:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:03,886 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 [2021-08-06 14:15:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:03,887 INFO L225 Difference]: With dead ends: 206 [2021-08-06 14:15:03,887 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 14:15:03,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 14:15:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-08-06 14:15:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-08-06 14:15:03,895 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-08-06 14:15:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:03,896 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-08-06 14:15:03,896 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) [2021-08-06 14:15:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-08-06 14:15:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:03,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:03,897 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:03,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:04,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:04,113 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:04,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1867084842, now seen corresponding path program 18 times [2021-08-06 14:15:04,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:04,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474397156] [2021-08-06 14:15:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:04,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:04,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:04,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474397156] [2021-08-06 14:15:04,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474397156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:04,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323043445] [2021-08-06 14:15:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:04,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:04,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:04,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:04,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 14:15:04,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:15:04,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:04,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:04,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:04,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323043445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:04,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:04,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:04,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2167582] [2021-08-06 14:15:04,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:04,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:04,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:04,473 INFO L87 Difference]: Start difference. First operand 139 states and 393 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) [2021-08-06 14:15:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:04,532 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-08-06 14:15:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:04,532 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 [2021-08-06 14:15:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:04,534 INFO L225 Difference]: With dead ends: 231 [2021-08-06 14:15:04,534 INFO L226 Difference]: Without dead ends: 231 [2021-08-06 14:15:04,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-06 14:15:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-08-06 14:15:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-08-06 14:15:04,539 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-08-06 14:15:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:04,539 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-08-06 14:15:04,539 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) [2021-08-06 14:15:04,539 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-08-06 14:15:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:04,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:04,540 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:04,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-06 14:15:04,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:04,757 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1877862140, now seen corresponding path program 19 times [2021-08-06 14:15:04,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:04,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041584573] [2021-08-06 14:15:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:04,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:04,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:04,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041584573] [2021-08-06 14:15:04,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041584573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:04,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324066195] [2021-08-06 14:15:04,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:04,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:04,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:04,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 14:15:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:05,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:05,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:05,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324066195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:05,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:05,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:05,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575878547] [2021-08-06 14:15:05,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:05,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:05,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:05,118 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:05,261 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-08-06 14:15:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:15:05,261 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 [2021-08-06 14:15:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:05,262 INFO L225 Difference]: With dead ends: 181 [2021-08-06 14:15:05,262 INFO L226 Difference]: Without dead ends: 179 [2021-08-06 14:15:05,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:15:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-06 14:15:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-08-06 14:15:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-08-06 14:15:05,266 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-08-06 14:15:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:05,266 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-08-06 14:15:05,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:05,267 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-08-06 14:15:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:05,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:05,267 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:05,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:05,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 14:15:05,475 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:05,475 INFO L82 PathProgramCache]: Analyzing trace with hash -156471534, now seen corresponding path program 20 times [2021-08-06 14:15:05,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:05,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404458688] [2021-08-06 14:15:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:05,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:05,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:05,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404458688] [2021-08-06 14:15:05,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404458688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:05,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989572118] [2021-08-06 14:15:05,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:05,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:05,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:05,562 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:05,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 14:15:05,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:05,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:05,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:05,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:05,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989572118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:05,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:05,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:05,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890622148] [2021-08-06 14:15:05,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:05,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:05,865 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:05,943 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-08-06 14:15:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:05,957 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 [2021-08-06 14:15:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:05,958 INFO L225 Difference]: With dead ends: 248 [2021-08-06 14:15:05,958 INFO L226 Difference]: Without dead ends: 248 [2021-08-06 14:15:05,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-06 14:15:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-08-06 14:15:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-08-06 14:15:05,964 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-08-06 14:15:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:05,964 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-08-06 14:15:05,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-08-06 14:15:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:05,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:05,965 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:05,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 14:15:06,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 14:15:06,182 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:06,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:06,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1083298366, now seen corresponding path program 21 times [2021-08-06 14:15:06,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:06,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198951074] [2021-08-06 14:15:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:06,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:06,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:06,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198951074] [2021-08-06 14:15:06,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198951074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:06,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008273574] [2021-08-06 14:15:06,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:06,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:06,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:06,249 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:06,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 14:15:06,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:15:06,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:06,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:06,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008273574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:06,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:06,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:06,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097795548] [2021-08-06 14:15:06,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:06,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:06,560 INFO L87 Difference]: Start difference. First operand 140 states and 394 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) [2021-08-06 14:15:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:06,710 INFO L93 Difference]: Finished difference Result 234 states and 536 transitions. [2021-08-06 14:15:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:06,711 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 [2021-08-06 14:15:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:06,712 INFO L225 Difference]: With dead ends: 234 [2021-08-06 14:15:06,712 INFO L226 Difference]: Without dead ends: 232 [2021-08-06 14:15:06,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-06 14:15:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 149. [2021-08-06 14:15:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.8783783783783785) internal successors, (426), 148 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 426 transitions. [2021-08-06 14:15:06,717 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 426 transitions. Word has length 16 [2021-08-06 14:15:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:06,717 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 426 transitions. [2021-08-06 14:15:06,717 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) [2021-08-06 14:15:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 426 transitions. [2021-08-06 14:15:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:06,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:06,717 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:06,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:06,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:06,933 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash -420210288, now seen corresponding path program 22 times [2021-08-06 14:15:06,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:06,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248955153] [2021-08-06 14:15:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:06,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:07,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:07,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248955153] [2021-08-06 14:15:07,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248955153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:07,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858047578] [2021-08-06 14:15:07,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:07,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:07,022 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:07,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 14:15:07,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:07,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:07,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858047578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:07,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:07,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:07,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442618847] [2021-08-06 14:15:07,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:07,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:07,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:07,304 INFO L87 Difference]: Start difference. First operand 149 states and 426 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) [2021-08-06 14:15:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:07,411 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2021-08-06 14:15:07,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:15:07,423 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 [2021-08-06 14:15:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:07,425 INFO L225 Difference]: With dead ends: 239 [2021-08-06 14:15:07,425 INFO L226 Difference]: Without dead ends: 239 [2021-08-06 14:15:07,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:15:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-06 14:15:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 155. [2021-08-06 14:15:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-08-06 14:15:07,430 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-08-06 14:15:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:07,430 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-08-06 14:15:07,430 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) [2021-08-06 14:15:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-08-06 14:15:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:07,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:07,431 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:07,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:07,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:07,649 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:07,650 INFO L82 PathProgramCache]: Analyzing trace with hash 488713122, now seen corresponding path program 23 times [2021-08-06 14:15:07,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:07,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440087406] [2021-08-06 14:15:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:07,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:07,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:07,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440087406] [2021-08-06 14:15:07,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440087406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:07,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821036626] [2021-08-06 14:15:07,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:07,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:07,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:07,729 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:07,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 14:15:07,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:15:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:07,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:07,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821036626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:07,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:07,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:07,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004881049] [2021-08-06 14:15:07,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:07,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:07,990 INFO L87 Difference]: Start difference. First operand 155 states and 444 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) [2021-08-06 14:15:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:08,097 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-08-06 14:15:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:08,097 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 [2021-08-06 14:15:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:08,099 INFO L225 Difference]: With dead ends: 229 [2021-08-06 14:15:08,099 INFO L226 Difference]: Without dead ends: 228 [2021-08-06 14:15:08,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-08-06 14:15:08,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-08-06 14:15:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-08-06 14:15:08,104 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-08-06 14:15:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:08,105 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-08-06 14:15:08,105 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) [2021-08-06 14:15:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-08-06 14:15:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:08,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:08,106 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:08,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 14:15:08,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 14:15:08,313 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1354797074, now seen corresponding path program 24 times [2021-08-06 14:15:08,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:08,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850815577] [2021-08-06 14:15:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:08,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:08,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:08,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850815577] [2021-08-06 14:15:08,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850815577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:08,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386590029] [2021-08-06 14:15:08,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:08,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:08,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:08,377 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:08,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 14:15:08,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:15:08,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:08,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:08,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386590029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:08,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:08,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:08,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030477501] [2021-08-06 14:15:08,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:08,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:08,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:08,673 INFO L87 Difference]: Start difference. First operand 155 states and 443 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) [2021-08-06 14:15:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:08,719 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-08-06 14:15:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:08,719 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 [2021-08-06 14:15:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:08,720 INFO L225 Difference]: With dead ends: 244 [2021-08-06 14:15:08,720 INFO L226 Difference]: Without dead ends: 244 [2021-08-06 14:15:08,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:08,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-06 14:15:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-08-06 14:15:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-08-06 14:15:08,725 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-08-06 14:15:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:08,725 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-08-06 14:15:08,725 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) [2021-08-06 14:15:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-08-06 14:15:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:08,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:08,727 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:08,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:08,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 14:15:08,941 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1344019776, now seen corresponding path program 25 times [2021-08-06 14:15:08,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:08,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107174897] [2021-08-06 14:15:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:08,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:09,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:09,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107174897] [2021-08-06 14:15:09,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107174897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:09,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224112898] [2021-08-06 14:15:09,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:09,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:09,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:09,010 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:09,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 14:15:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:09,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:09,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224112898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:09,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:09,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:09,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172641664] [2021-08-06 14:15:09,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:09,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:09,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:09,283 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:09,417 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-08-06 14:15:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:15:09,418 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 [2021-08-06 14:15:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:09,419 INFO L225 Difference]: With dead ends: 234 [2021-08-06 14:15:09,419 INFO L226 Difference]: Without dead ends: 232 [2021-08-06 14:15:09,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:15:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-06 14:15:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-08-06 14:15:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-08-06 14:15:09,425 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-08-06 14:15:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:09,426 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-08-06 14:15:09,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-08-06 14:15:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:09,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:09,426 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:09,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:09,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 14:15:09,645 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:09,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:09,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1229556914, now seen corresponding path program 26 times [2021-08-06 14:15:09,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:09,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413794898] [2021-08-06 14:15:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:09,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:09,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:09,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413794898] [2021-08-06 14:15:09,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413794898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:09,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990473578] [2021-08-06 14:15:09,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:09,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:09,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:09,718 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:09,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 14:15:09,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:09,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:09,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:09,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:10,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990473578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:10,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:10,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:10,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676491385] [2021-08-06 14:15:10,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:10,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:10,016 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:10,103 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-08-06 14:15:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:10,104 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 [2021-08-06 14:15:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:10,105 INFO L225 Difference]: With dead ends: 257 [2021-08-06 14:15:10,105 INFO L226 Difference]: Without dead ends: 257 [2021-08-06 14:15:10,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-06 14:15:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-08-06 14:15:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-08-06 14:15:10,110 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-08-06 14:15:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:10,110 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-08-06 14:15:10,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-08-06 14:15:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:10,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:10,111 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:10,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:10,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:10,335 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2088722274, now seen corresponding path program 27 times [2021-08-06 14:15:10,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:10,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232712647] [2021-08-06 14:15:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:10,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:10,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:10,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232712647] [2021-08-06 14:15:10,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232712647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:10,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663339550] [2021-08-06 14:15:10,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:10,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:10,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:10,397 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:10,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 14:15:10,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:15:10,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:10,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:15:10,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:10,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663339550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:10,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:10,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-06 14:15:10,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421478812] [2021-08-06 14:15:10,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:15:10,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:15:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:15:10,776 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:11,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:11,083 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-08-06 14:15:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:15:11,083 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 16 [2021-08-06 14:15:11,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:11,085 INFO L225 Difference]: With dead ends: 265 [2021-08-06 14:15:11,085 INFO L226 Difference]: Without dead ends: 262 [2021-08-06 14:15:11,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:15:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-06 14:15:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-08-06 14:15:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-08-06 14:15:11,091 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-08-06 14:15:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:11,091 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-08-06 14:15:11,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-08-06 14:15:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:11,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:11,092 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:11,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:11,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:11,316 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:11,316 INFO L82 PathProgramCache]: Analyzing trace with hash 259848082, now seen corresponding path program 28 times [2021-08-06 14:15:11,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:11,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427611907] [2021-08-06 14:15:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:11,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:11,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:11,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427611907] [2021-08-06 14:15:11,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427611907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:11,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393953162] [2021-08-06 14:15:11,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:11,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:11,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:11,389 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:11,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 14:15:11,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:11,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:11,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:11,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393953162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:11,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:11,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:11,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205436540] [2021-08-06 14:15:11,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:11,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:11,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:11,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:11,699 INFO L87 Difference]: Start difference. First operand 202 states and 567 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:11,824 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-08-06 14:15:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:15:11,824 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 [2021-08-06 14:15:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:11,826 INFO L225 Difference]: With dead ends: 353 [2021-08-06 14:15:11,826 INFO L226 Difference]: Without dead ends: 353 [2021-08-06 14:15:11,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:15:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-06 14:15:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-08-06 14:15:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-08-06 14:15:11,832 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-08-06 14:15:11,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:11,832 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-08-06 14:15:11,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:11,832 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-08-06 14:15:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:11,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:11,833 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:11,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:12,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:12,049 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:12,049 INFO L82 PathProgramCache]: Analyzing trace with hash 10793222, now seen corresponding path program 29 times [2021-08-06 14:15:12,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:12,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496362467] [2021-08-06 14:15:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:12,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:12,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:12,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496362467] [2021-08-06 14:15:12,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496362467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:12,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799164624] [2021-08-06 14:15:12,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:12,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:12,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:12,129 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:12,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 14:15:12,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:15:12,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:12,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:12,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799164624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:12,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:12,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:12,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261858005] [2021-08-06 14:15:12,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:12,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:12,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:12,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:12,447 INFO L87 Difference]: Start difference. First operand 215 states and 612 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) [2021-08-06 14:15:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:12,564 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-08-06 14:15:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:12,565 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 [2021-08-06 14:15:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:12,566 INFO L225 Difference]: With dead ends: 342 [2021-08-06 14:15:12,566 INFO L226 Difference]: Without dead ends: 340 [2021-08-06 14:15:12,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-08-06 14:15:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-08-06 14:15:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-08-06 14:15:12,575 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-08-06 14:15:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:12,576 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-08-06 14:15:12,576 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) [2021-08-06 14:15:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-08-06 14:15:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:12,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:12,577 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:12,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 14:15:12,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 14:15:12,794 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:12,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1846078634, now seen corresponding path program 30 times [2021-08-06 14:15:12,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:12,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712023561] [2021-08-06 14:15:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:12,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:12,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:12,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712023561] [2021-08-06 14:15:12,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712023561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:12,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439561659] [2021-08-06 14:15:12,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:12,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:12,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:12,871 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:12,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 14:15:13,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:15:13,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:13,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439561659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:13,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:13,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:13,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454401069] [2021-08-06 14:15:13,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:13,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:13,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:13,196 INFO L87 Difference]: Start difference. First operand 239 states and 693 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) [2021-08-06 14:15:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:13,235 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-08-06 14:15:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:13,241 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 [2021-08-06 14:15:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:13,242 INFO L225 Difference]: With dead ends: 348 [2021-08-06 14:15:13,242 INFO L226 Difference]: Without dead ends: 348 [2021-08-06 14:15:13,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-06 14:15:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-08-06 14:15:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-08-06 14:15:13,248 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-08-06 14:15:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:13,248 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-08-06 14:15:13,248 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) [2021-08-06 14:15:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-08-06 14:15:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:13,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:13,249 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:13,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:13,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:13,465 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash -135465326, now seen corresponding path program 31 times [2021-08-06 14:15:13,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:13,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563348524] [2021-08-06 14:15:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:13,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:13,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:13,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563348524] [2021-08-06 14:15:13,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563348524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:13,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321737855] [2021-08-06 14:15:13,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:13,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:13,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:13,537 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:13,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 14:15:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:13,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:13,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:13,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321737855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:13,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:13,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:13,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421456761] [2021-08-06 14:15:13,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:13,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:13,874 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:13,958 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-08-06 14:15:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:13,958 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 [2021-08-06 14:15:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:13,959 INFO L225 Difference]: With dead ends: 362 [2021-08-06 14:15:13,959 INFO L226 Difference]: Without dead ends: 362 [2021-08-06 14:15:13,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-06 14:15:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-08-06 14:15:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:13,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-08-06 14:15:13,965 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-08-06 14:15:13,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:13,965 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-08-06 14:15:13,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:13,966 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-08-06 14:15:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:13,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:13,966 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:13,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:14,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:14,181 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1353939670, now seen corresponding path program 32 times [2021-08-06 14:15:14,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:14,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73845123] [2021-08-06 14:15:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:14,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:14,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:14,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73845123] [2021-08-06 14:15:14,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73845123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:14,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211572438] [2021-08-06 14:15:14,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:14,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:14,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:14,240 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:14,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 14:15:14,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:14,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:14,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211572438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:14,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:14,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:14,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308855851] [2021-08-06 14:15:14,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:14,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:14,564 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:14,645 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-08-06 14:15:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:14,646 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 [2021-08-06 14:15:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:14,647 INFO L225 Difference]: With dead ends: 346 [2021-08-06 14:15:14,647 INFO L226 Difference]: Without dead ends: 346 [2021-08-06 14:15:14,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:15:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-06 14:15:14,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-08-06 14:15:14,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-08-06 14:15:14,653 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-08-06 14:15:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:14,653 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-08-06 14:15:14,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-08-06 14:15:14,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:14,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:14,654 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:14,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 14:15:14,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 14:15:14,867 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash 280854290, now seen corresponding path program 33 times [2021-08-06 14:15:14,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:14,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018422909] [2021-08-06 14:15:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:14,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:14,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:14,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018422909] [2021-08-06 14:15:14,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018422909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:14,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667951941] [2021-08-06 14:15:14,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:14,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:14,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:14,936 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:14,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 14:15:15,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:15:15,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:15,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:15,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667951941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:15,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:15,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:15,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99822188] [2021-08-06 14:15:15,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:15,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:15,304 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:15,437 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-08-06 14:15:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:15:15,437 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 [2021-08-06 14:15:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:15,438 INFO L225 Difference]: With dead ends: 402 [2021-08-06 14:15:15,438 INFO L226 Difference]: Without dead ends: 402 [2021-08-06 14:15:15,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:15:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-06 14:15:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-08-06 14:15:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-08-06 14:15:15,444 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-08-06 14:15:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:15,444 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-08-06 14:15:15,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-08-06 14:15:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:15,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:15,445 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:15,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 14:15:15,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 14:15:15,661 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:15,661 INFO L82 PathProgramCache]: Analyzing trace with hash -432105918, now seen corresponding path program 34 times [2021-08-06 14:15:15,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:15,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10058986] [2021-08-06 14:15:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:15,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:15,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:15,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10058986] [2021-08-06 14:15:15,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10058986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:15,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061045258] [2021-08-06 14:15:15,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:15,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:15,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:15,730 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:15,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 14:15:15,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:15,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:15,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:15,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:16,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061045258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:16,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:16,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:16,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129574113] [2021-08-06 14:15:16,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:16,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:16,076 INFO L87 Difference]: Start difference. First operand 254 states and 742 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) [2021-08-06 14:15:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:16,169 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-08-06 14:15:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:16,169 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 [2021-08-06 14:15:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:16,170 INFO L225 Difference]: With dead ends: 396 [2021-08-06 14:15:16,170 INFO L226 Difference]: Without dead ends: 394 [2021-08-06 14:15:16,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-06 14:15:16,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-08-06 14:15:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-08-06 14:15:16,178 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-08-06 14:15:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:16,178 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-08-06 14:15:16,178 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) [2021-08-06 14:15:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-08-06 14:15:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:16,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:16,179 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:16,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:16,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 14:15:16,399 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:16,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2005989522, now seen corresponding path program 35 times [2021-08-06 14:15:16,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:16,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898179167] [2021-08-06 14:15:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:16,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:16,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:16,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898179167] [2021-08-06 14:15:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898179167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:16,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700343689] [2021-08-06 14:15:16,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:16,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:16,482 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:16,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 14:15:16,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:15:16,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:16,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:16,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:16,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700343689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:16,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:16,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:16,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207327485] [2021-08-06 14:15:16,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:16,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:16,837 INFO L87 Difference]: Start difference. First operand 292 states and 868 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) [2021-08-06 14:15:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:16,882 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-08-06 14:15:16,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:16,882 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 [2021-08-06 14:15:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:16,884 INFO L225 Difference]: With dead ends: 394 [2021-08-06 14:15:16,884 INFO L226 Difference]: Without dead ends: 394 [2021-08-06 14:15:16,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:16,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-06 14:15:16,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-08-06 14:15:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-08-06 14:15:16,890 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-08-06 14:15:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:16,891 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-08-06 14:15:16,891 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) [2021-08-06 14:15:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-08-06 14:15:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:16,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:16,892 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:16,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:17,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 14:15:17,105 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash -578364466, now seen corresponding path program 36 times [2021-08-06 14:15:17,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:17,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545576259] [2021-08-06 14:15:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:17,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:17,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:17,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545576259] [2021-08-06 14:15:17,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545576259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:17,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984720046] [2021-08-06 14:15:17,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:17,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:17,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:17,173 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:17,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 14:15:17,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:15:17,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:17,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:17,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:17,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984720046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:17,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:17,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:17,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668740855] [2021-08-06 14:15:17,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:17,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:17,513 INFO L87 Difference]: Start difference. First operand 290 states and 860 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:17,588 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-08-06 14:15:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:17,589 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 [2021-08-06 14:15:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:17,590 INFO L225 Difference]: With dead ends: 402 [2021-08-06 14:15:17,590 INFO L226 Difference]: Without dead ends: 402 [2021-08-06 14:15:17,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:17,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-06 14:15:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-08-06 14:15:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-08-06 14:15:17,595 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-08-06 14:15:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:17,596 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-08-06 14:15:17,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-08-06 14:15:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:17,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:17,597 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:17,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:17,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 14:15:17,817 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:17,817 INFO L82 PathProgramCache]: Analyzing trace with hash 911040530, now seen corresponding path program 37 times [2021-08-06 14:15:17,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:17,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288818469] [2021-08-06 14:15:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:17,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:17,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:17,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288818469] [2021-08-06 14:15:17,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288818469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:17,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521781573] [2021-08-06 14:15:17,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:17,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:17,874 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:17,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 14:15:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:18,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:18,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:18,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521781573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:18,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:18,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:18,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175539362] [2021-08-06 14:15:18,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:18,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:18,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:18,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:18,239 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:18,323 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-08-06 14:15:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:18,323 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 [2021-08-06 14:15:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:18,325 INFO L225 Difference]: With dead ends: 379 [2021-08-06 14:15:18,325 INFO L226 Difference]: Without dead ends: 379 [2021-08-06 14:15:18,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:15:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-06 14:15:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-08-06 14:15:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-08-06 14:15:18,343 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-08-06 14:15:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:18,343 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-08-06 14:15:18,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-08-06 14:15:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:18,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:18,344 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:18,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:18,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-06 14:15:18,557 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:18,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:18,557 INFO L82 PathProgramCache]: Analyzing trace with hash -162044850, now seen corresponding path program 38 times [2021-08-06 14:15:18,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:18,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147685224] [2021-08-06 14:15:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:18,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:18,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:18,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147685224] [2021-08-06 14:15:18,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147685224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:18,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436923231] [2021-08-06 14:15:18,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:18,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:18,614 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:18,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 14:15:18,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:18,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:18,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:18,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:18,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436923231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:18,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:18,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:18,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356952140] [2021-08-06 14:15:18,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:18,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:18,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:18,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:18,957 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:19,074 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-08-06 14:15:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:15:19,075 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 [2021-08-06 14:15:19,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:19,076 INFO L225 Difference]: With dead ends: 381 [2021-08-06 14:15:19,076 INFO L226 Difference]: Without dead ends: 381 [2021-08-06 14:15:19,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:15:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-08-06 14:15:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-08-06 14:15:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-08-06 14:15:19,082 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-08-06 14:15:19,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:19,082 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-08-06 14:15:19,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:19,082 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-08-06 14:15:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:19,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:19,083 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:19,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:19,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 14:15:19,301 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:19,301 INFO L82 PathProgramCache]: Analyzing trace with hash 932046738, now seen corresponding path program 39 times [2021-08-06 14:15:19,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:19,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771690779] [2021-08-06 14:15:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:19,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:19,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:19,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771690779] [2021-08-06 14:15:19,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771690779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:19,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358749014] [2021-08-06 14:15:19,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:19,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:19,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:19,370 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:19,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 14:15:19,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:15:19,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:19,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:19,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:19,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358749014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:19,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:19,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:19,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367804707] [2021-08-06 14:15:19,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:19,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:19,732 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:19,887 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-08-06 14:15:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:15:19,888 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 [2021-08-06 14:15:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:19,889 INFO L225 Difference]: With dead ends: 438 [2021-08-06 14:15:19,889 INFO L226 Difference]: Without dead ends: 438 [2021-08-06 14:15:19,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:15:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-06 14:15:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-08-06 14:15:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-08-06 14:15:19,895 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-08-06 14:15:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:19,896 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-08-06 14:15:19,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-08-06 14:15:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:19,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:19,897 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:19,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:20,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 14:15:20,105 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1277077370, now seen corresponding path program 40 times [2021-08-06 14:15:20,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:20,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291814365] [2021-08-06 14:15:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:20,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:20,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:20,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291814365] [2021-08-06 14:15:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291814365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:20,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032387788] [2021-08-06 14:15:20,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:20,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:20,183 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:20,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 14:15:20,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:20,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:20,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:20,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032387788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:20,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:20,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:20,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021223824] [2021-08-06 14:15:20,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:20,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:20,561 INFO L87 Difference]: Start difference. First operand 297 states and 879 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) [2021-08-06 14:15:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:20,665 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-08-06 14:15:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:20,665 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 [2021-08-06 14:15:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:20,666 INFO L225 Difference]: With dead ends: 446 [2021-08-06 14:15:20,666 INFO L226 Difference]: Without dead ends: 444 [2021-08-06 14:15:20,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-06 14:15:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-08-06 14:15:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-08-06 14:15:20,673 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-08-06 14:15:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:20,674 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-08-06 14:15:20,674 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) [2021-08-06 14:15:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-08-06 14:15:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:20,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:20,675 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:20,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:20,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:20,895 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:20,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1161018070, now seen corresponding path program 41 times [2021-08-06 14:15:20,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:20,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290680773] [2021-08-06 14:15:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:20,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:20,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:20,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290680773] [2021-08-06 14:15:20,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290680773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:20,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916341419] [2021-08-06 14:15:20,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:20,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:20,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:20,955 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:20,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 14:15:21,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:15:21,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:21,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916341419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:21,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:21,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:21,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156909524] [2021-08-06 14:15:21,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:21,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:21,333 INFO L87 Difference]: Start difference. First operand 344 states and 1030 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) [2021-08-06 14:15:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:21,387 INFO L93 Difference]: Finished difference Result 431 states and 1124 transitions. [2021-08-06 14:15:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:15:21,387 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 [2021-08-06 14:15:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:21,389 INFO L225 Difference]: With dead ends: 431 [2021-08-06 14:15:21,389 INFO L226 Difference]: Without dead ends: 431 [2021-08-06 14:15:21,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-06 14:15:21,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 342. [2021-08-06 14:15:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-08-06 14:15:21,396 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-08-06 14:15:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:21,396 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-08-06 14:15:21,396 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) [2021-08-06 14:15:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-08-06 14:15:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:21,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:21,397 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:21,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:21,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:21,621 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1423335918, now seen corresponding path program 42 times [2021-08-06 14:15:21,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:21,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572544907] [2021-08-06 14:15:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:21,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:21,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:21,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572544907] [2021-08-06 14:15:21,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572544907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:21,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246603916] [2021-08-06 14:15:21,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:21,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:21,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:21,697 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:21,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 14:15:22,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:15:22,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:22,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:22,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246603916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:22,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:22,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:22,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548980631] [2021-08-06 14:15:22,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:22,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:22,132 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:22,197 INFO L93 Difference]: Finished difference Result 435 states and 1129 transitions. [2021-08-06 14:15:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:15:22,198 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 [2021-08-06 14:15:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:22,199 INFO L225 Difference]: With dead ends: 435 [2021-08-06 14:15:22,199 INFO L226 Difference]: Without dead ends: 435 [2021-08-06 14:15:22,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-06 14:15:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 338. [2021-08-06 14:15:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 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) [2021-08-06 14:15:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-08-06 14:15:22,205 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-08-06 14:15:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:22,205 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-08-06 14:15:22,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-08-06 14:15:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:22,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:22,206 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:22,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 14:15:22,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 14:15:22,413 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:22,413 INFO L82 PathProgramCache]: Analyzing trace with hash 66069078, now seen corresponding path program 43 times [2021-08-06 14:15:22,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:22,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150747838] [2021-08-06 14:15:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:22,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:22,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:22,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150747838] [2021-08-06 14:15:22,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150747838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:22,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398604951] [2021-08-06 14:15:22,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:22,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:22,487 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:22,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 14:15:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:22,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:22,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:22,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398604951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:22,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:22,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:22,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922108907] [2021-08-06 14:15:22,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:22,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:22,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:22,869 INFO L87 Difference]: Start difference. First operand 338 states and 1004 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:22,949 INFO L93 Difference]: Finished difference Result 409 states and 1090 transitions. [2021-08-06 14:15:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:15:22,950 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 [2021-08-06 14:15:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:22,951 INFO L225 Difference]: With dead ends: 409 [2021-08-06 14:15:22,951 INFO L226 Difference]: Without dead ends: 409 [2021-08-06 14:15:22,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:15:22,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-08-06 14:15:22,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 332. [2021-08-06 14:15:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-08-06 14:15:22,958 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-08-06 14:15:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:22,958 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-08-06 14:15:22,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-08-06 14:15:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:22,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:22,959 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:22,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 14:15:23,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 14:15:23,169 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1007016302, now seen corresponding path program 44 times [2021-08-06 14:15:23,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:23,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350395307] [2021-08-06 14:15:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:23,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:23,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:23,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350395307] [2021-08-06 14:15:23,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350395307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:23,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544592057] [2021-08-06 14:15:23,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:23,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:23,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:23,231 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:23,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 14:15:23,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:23,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:23,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:23,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544592057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:23,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:23,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:23,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53200660] [2021-08-06 14:15:23,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:23,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:23,615 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:23,714 INFO L93 Difference]: Finished difference Result 382 states and 1050 transitions. [2021-08-06 14:15:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:15:23,715 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 [2021-08-06 14:15:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:23,716 INFO L225 Difference]: With dead ends: 382 [2021-08-06 14:15:23,716 INFO L226 Difference]: Without dead ends: 382 [2021-08-06 14:15:23,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-08-06 14:15:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 325. [2021-08-06 14:15:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-08-06 14:15:23,723 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-08-06 14:15:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:23,723 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-08-06 14:15:23,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-08-06 14:15:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:23,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:23,724 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:23,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 14:15:23,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 14:15:23,937 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:23,937 INFO L82 PathProgramCache]: Analyzing trace with hash 87075286, now seen corresponding path program 45 times [2021-08-06 14:15:23,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:23,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111706827] [2021-08-06 14:15:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:23,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:24,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:24,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111706827] [2021-08-06 14:15:24,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111706827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:24,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123136728] [2021-08-06 14:15:24,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:24,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:24,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:24,003 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:24,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 14:15:24,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:15:24,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:24,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:24,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123136728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:24,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:24,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:24,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183488873] [2021-08-06 14:15:24,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:24,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:24,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:24,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:24,417 INFO L87 Difference]: Start difference. First operand 325 states and 962 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:24,539 INFO L93 Difference]: Finished difference Result 394 states and 1076 transitions. [2021-08-06 14:15:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:15:24,540 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 [2021-08-06 14:15:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:24,541 INFO L225 Difference]: With dead ends: 394 [2021-08-06 14:15:24,541 INFO L226 Difference]: Without dead ends: 394 [2021-08-06 14:15:24,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:15:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-06 14:15:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 320. [2021-08-06 14:15:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-08-06 14:15:24,548 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-08-06 14:15:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:24,548 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-08-06 14:15:24,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-08-06 14:15:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:15:24,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:24,549 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:24,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:24,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:24,772 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:24,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:24,773 INFO L82 PathProgramCache]: Analyzing trace with hash -355823854, now seen corresponding path program 46 times [2021-08-06 14:15:24,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:24,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702805447] [2021-08-06 14:15:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:24,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:24,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:24,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702805447] [2021-08-06 14:15:24,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702805447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:24,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919987354] [2021-08-06 14:15:24,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:24,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:24,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:24,851 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:24,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 14:15:25,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:25,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:25,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:25,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919987354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:25,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:25,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:15:25,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736735053] [2021-08-06 14:15:25,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:25,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:25,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:25,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:25,242 INFO L87 Difference]: Start difference. First operand 320 states and 946 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:25,401 INFO L93 Difference]: Finished difference Result 443 states and 1208 transitions. [2021-08-06 14:15:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:15:25,401 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 [2021-08-06 14:15:25,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:25,403 INFO L225 Difference]: With dead ends: 443 [2021-08-06 14:15:25,403 INFO L226 Difference]: Without dead ends: 443 [2021-08-06 14:15:25,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:15:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-06 14:15:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 317. [2021-08-06 14:15:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-08-06 14:15:25,408 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-08-06 14:15:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:25,409 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-08-06 14:15:25,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-08-06 14:15:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:25,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:25,410 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:25,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:25,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 14:15:25,634 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:25,635 INFO L82 PathProgramCache]: Analyzing trace with hash 79297781, now seen corresponding path program 47 times [2021-08-06 14:15:25,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:25,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107759073] [2021-08-06 14:15:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:25,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:25,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:25,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107759073] [2021-08-06 14:15:25,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107759073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:25,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997325147] [2021-08-06 14:15:25,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:25,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:25,694 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:25,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 14:15:26,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:15:26,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:26,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:15:26,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997325147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:26,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:26,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:26,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571455413] [2021-08-06 14:15:26,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:26,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:26,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:26,152 INFO L87 Difference]: Start difference. First operand 317 states and 946 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) [2021-08-06 14:15:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:26,198 INFO L93 Difference]: Finished difference Result 414 states and 1097 transitions. [2021-08-06 14:15:26,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:15:26,198 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 [2021-08-06 14:15:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:26,200 INFO L225 Difference]: With dead ends: 414 [2021-08-06 14:15:26,200 INFO L226 Difference]: Without dead ends: 414 [2021-08-06 14:15:26,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-06 14:15:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-08-06 14:15:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.0062111801242235) internal successors, (968), 322 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 968 transitions. [2021-08-06 14:15:26,206 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 968 transitions. Word has length 17 [2021-08-06 14:15:26,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:26,206 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 968 transitions. [2021-08-06 14:15:26,206 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) [2021-08-06 14:15:26,207 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 968 transitions. [2021-08-06 14:15:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:26,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:26,229 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:26,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:26,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:26,445 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:26,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:26,445 INFO L82 PathProgramCache]: Analyzing trace with hash 988221191, now seen corresponding path program 48 times [2021-08-06 14:15:26,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:26,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136168995] [2021-08-06 14:15:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:26,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:26,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:26,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136168995] [2021-08-06 14:15:26,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136168995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:26,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232300345] [2021-08-06 14:15:26,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:26,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:26,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:26,533 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:26,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 14:15:26,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:15:26,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:26,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:26,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232300345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:26,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:26,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:26,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85257620] [2021-08-06 14:15:26,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:26,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:27,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:27,000 INFO L87 Difference]: Start difference. First operand 323 states and 968 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) [2021-08-06 14:15:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:27,049 INFO L93 Difference]: Finished difference Result 417 states and 1096 transitions. [2021-08-06 14:15:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:27,050 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 [2021-08-06 14:15:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:27,051 INFO L225 Difference]: With dead ends: 417 [2021-08-06 14:15:27,051 INFO L226 Difference]: Without dead ends: 416 [2021-08-06 14:15:27,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-06 14:15:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 323. [2021-08-06 14:15:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.0031055900621118) internal successors, (967), 322 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 967 transitions. [2021-08-06 14:15:27,070 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 967 transitions. Word has length 17 [2021-08-06 14:15:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:27,070 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 967 transitions. [2021-08-06 14:15:27,070 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) [2021-08-06 14:15:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 967 transitions. [2021-08-06 14:15:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:27,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:27,071 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:27,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 14:15:27,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 14:15:27,272 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:27,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1843527845, now seen corresponding path program 49 times [2021-08-06 14:15:27,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:27,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128604812] [2021-08-06 14:15:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:27,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:27,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:27,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128604812] [2021-08-06 14:15:27,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128604812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:27,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449786206] [2021-08-06 14:15:27,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:27,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:27,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:27,388 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:27,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 14:15:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:27,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:27,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:27,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449786206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:27,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:27,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-08-06 14:15:27,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885931332] [2021-08-06 14:15:27,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:27,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:27,857 INFO L87 Difference]: Start difference. First operand 323 states and 967 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) [2021-08-06 14:15:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:27,991 INFO L93 Difference]: Finished difference Result 419 states and 1096 transitions. [2021-08-06 14:15:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:15:27,991 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 [2021-08-06 14:15:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:27,993 INFO L225 Difference]: With dead ends: 419 [2021-08-06 14:15:27,993 INFO L226 Difference]: Without dead ends: 417 [2021-08-06 14:15:27,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:15:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-06 14:15:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 323. [2021-08-06 14:15:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-08-06 14:15:28,027 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-08-06 14:15:28,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:28,027 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-08-06 14:15:28,027 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) [2021-08-06 14:15:28,027 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-08-06 14:15:28,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:28,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:28,028 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:28,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:28,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 14:15:28,229 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:28,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:28,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1706736953, now seen corresponding path program 50 times [2021-08-06 14:15:28,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:28,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587567090] [2021-08-06 14:15:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:28,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:28,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:28,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587567090] [2021-08-06 14:15:28,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587567090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:28,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171454344] [2021-08-06 14:15:28,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:28,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:28,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:28,320 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:28,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 14:15:28,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:28,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:28,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:28,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171454344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:28,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:28,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-06 14:15:28,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136673077] [2021-08-06 14:15:28,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:28,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:28,819 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:29,028 INFO L93 Difference]: Finished difference Result 424 states and 1101 transitions. [2021-08-06 14:15:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:15:29,028 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 [2021-08-06 14:15:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:29,030 INFO L225 Difference]: With dead ends: 424 [2021-08-06 14:15:29,030 INFO L226 Difference]: Without dead ends: 421 [2021-08-06 14:15:29,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:15:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-08-06 14:15:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 323. [2021-08-06 14:15:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9937888198757765) internal successors, (964), 322 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 964 transitions. [2021-08-06 14:15:29,037 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 964 transitions. Word has length 17 [2021-08-06 14:15:29,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:29,037 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 964 transitions. [2021-08-06 14:15:29,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 964 transitions. [2021-08-06 14:15:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:29,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:29,038 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:29,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:29,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:29,238 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:29,239 INFO L82 PathProgramCache]: Analyzing trace with hash -95795995, now seen corresponding path program 51 times [2021-08-06 14:15:29,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:29,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398544523] [2021-08-06 14:15:29,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:29,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:29,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:29,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398544523] [2021-08-06 14:15:29,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398544523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:29,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496476478] [2021-08-06 14:15:29,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:29,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:29,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:29,334 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:29,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 14:15:29,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:15:29,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:29,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:29,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496476478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:29,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:29,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:15:29,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586071140] [2021-08-06 14:15:29,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:29,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:29,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:29,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:29,870 INFO L87 Difference]: Start difference. First operand 323 states and 964 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:29,984 INFO L93 Difference]: Finished difference Result 367 states and 1051 transitions. [2021-08-06 14:15:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:15:29,985 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 [2021-08-06 14:15:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:29,986 INFO L225 Difference]: With dead ends: 367 [2021-08-06 14:15:29,986 INFO L226 Difference]: Without dead ends: 364 [2021-08-06 14:15:29,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:15:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-06 14:15:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-08-06 14:15:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-08-06 14:15:29,992 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-08-06 14:15:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:29,992 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-08-06 14:15:29,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-08-06 14:15:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:30,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:30,003 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:30,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:30,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 14:15:30,225 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1696233849, now seen corresponding path program 52 times [2021-08-06 14:15:30,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:30,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059416614] [2021-08-06 14:15:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:30,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:30,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:30,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059416614] [2021-08-06 14:15:30,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059416614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:30,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094214361] [2021-08-06 14:15:30,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:30,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:30,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:30,331 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:30,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 14:15:30,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:30,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:30,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:30,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:30,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094214361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:30,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:30,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-06 14:15:30,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124701243] [2021-08-06 14:15:30,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:30,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:30,850 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:30,997 INFO L93 Difference]: Finished difference Result 355 states and 1037 transitions. [2021-08-06 14:15:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:30,998 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 [2021-08-06 14:15:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:30,999 INFO L225 Difference]: With dead ends: 355 [2021-08-06 14:15:30,999 INFO L226 Difference]: Without dead ends: 351 [2021-08-06 14:15:30,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:15:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-06 14:15:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-08-06 14:15:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-08-06 14:15:31,005 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-08-06 14:15:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:31,005 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-08-06 14:15:31,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-08-06 14:15:31,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:31,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:31,006 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:31,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:31,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 14:15:31,234 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:31,234 INFO L82 PathProgramCache]: Analyzing trace with hash -765673671, now seen corresponding path program 53 times [2021-08-06 14:15:31,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:31,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665894833] [2021-08-06 14:15:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:31,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:31,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:31,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665894833] [2021-08-06 14:15:31,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665894833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:31,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871568861] [2021-08-06 14:15:31,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:31,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:31,316 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:31,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 14:15:31,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:15:31,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:31,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:31,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:31,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871568861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:31,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:31,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:31,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204622137] [2021-08-06 14:15:31,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:31,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:31,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:31,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:31,825 INFO L87 Difference]: Start difference. First operand 323 states and 962 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) [2021-08-06 14:15:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:31,904 INFO L93 Difference]: Finished difference Result 446 states and 1161 transitions. [2021-08-06 14:15:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:31,904 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 [2021-08-06 14:15:31,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:31,906 INFO L225 Difference]: With dead ends: 446 [2021-08-06 14:15:31,906 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 14:15:31,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 14:15:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 330. [2021-08-06 14:15:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0060790273556233) internal successors, (989), 329 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 989 transitions. [2021-08-06 14:15:31,912 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 989 transitions. Word has length 17 [2021-08-06 14:15:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:31,912 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 989 transitions. [2021-08-06 14:15:31,912 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) [2021-08-06 14:15:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 989 transitions. [2021-08-06 14:15:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:31,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:31,913 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:31,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:32,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:32,129 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash 143249739, now seen corresponding path program 54 times [2021-08-06 14:15:32,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:32,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793774357] [2021-08-06 14:15:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:32,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:32,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:32,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793774357] [2021-08-06 14:15:32,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793774357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:32,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496733948] [2021-08-06 14:15:32,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:32,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:32,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:32,231 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:32,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 14:15:32,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:15:32,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:32,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:15:32,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496733948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:32,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:32,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:32,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024498246] [2021-08-06 14:15:32,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:32,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:32,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:32,775 INFO L87 Difference]: Start difference. First operand 330 states and 989 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) [2021-08-06 14:15:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:32,823 INFO L93 Difference]: Finished difference Result 440 states and 1145 transitions. [2021-08-06 14:15:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:32,823 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 [2021-08-06 14:15:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:32,825 INFO L225 Difference]: With dead ends: 440 [2021-08-06 14:15:32,825 INFO L226 Difference]: Without dead ends: 439 [2021-08-06 14:15:32,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-06 14:15:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 330. [2021-08-06 14:15:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0030395136778116) internal successors, (988), 329 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 988 transitions. [2021-08-06 14:15:32,830 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 988 transitions. Word has length 17 [2021-08-06 14:15:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:32,831 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 988 transitions. [2021-08-06 14:15:32,831 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) [2021-08-06 14:15:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 988 transitions. [2021-08-06 14:15:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:32,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:32,832 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:32,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:33,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:33,044 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash 998556393, now seen corresponding path program 55 times [2021-08-06 14:15:33,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:33,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631082073] [2021-08-06 14:15:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:33,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:33,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:33,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631082073] [2021-08-06 14:15:33,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631082073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:33,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709133765] [2021-08-06 14:15:33,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:33,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:33,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:33,133 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:33,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 14:15:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:33,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:33,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709133765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:33,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:33,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-08-06 14:15:33,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710872881] [2021-08-06 14:15:33,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:33,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:33,701 INFO L87 Difference]: Start difference. First operand 330 states and 988 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) [2021-08-06 14:15:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:33,822 INFO L93 Difference]: Finished difference Result 442 states and 1145 transitions. [2021-08-06 14:15:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:15:33,822 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 [2021-08-06 14:15:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:33,824 INFO L225 Difference]: With dead ends: 442 [2021-08-06 14:15:33,824 INFO L226 Difference]: Without dead ends: 440 [2021-08-06 14:15:33,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:15:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-06 14:15:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 330. [2021-08-06 14:15:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-08-06 14:15:33,829 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 17 [2021-08-06 14:15:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:33,829 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-08-06 14:15:33,829 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) [2021-08-06 14:15:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-08-06 14:15:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:33,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:33,831 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:33,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:34,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:34,033 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1743258891, now seen corresponding path program 56 times [2021-08-06 14:15:34,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:34,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593082962] [2021-08-06 14:15:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:34,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:34,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:34,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593082962] [2021-08-06 14:15:34,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593082962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:34,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450676480] [2021-08-06 14:15:34,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:34,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:34,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:34,148 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:34,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 14:15:34,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:34,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:34,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:34,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450676480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:34,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:34,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-06 14:15:34,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353707126] [2021-08-06 14:15:34,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:34,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:34,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:34,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:34,697 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:34,829 INFO L93 Difference]: Finished difference Result 446 states and 1149 transitions. [2021-08-06 14:15:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:15:34,830 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 [2021-08-06 14:15:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:34,832 INFO L225 Difference]: With dead ends: 446 [2021-08-06 14:15:34,832 INFO L226 Difference]: Without dead ends: 443 [2021-08-06 14:15:34,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:15:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-06 14:15:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-08-06 14:15:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9939209726443767) internal successors, (985), 329 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 985 transitions. [2021-08-06 14:15:34,854 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 985 transitions. Word has length 17 [2021-08-06 14:15:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:34,854 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 985 transitions. [2021-08-06 14:15:34,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:34,854 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 985 transitions. [2021-08-06 14:15:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:34,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:34,855 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:34,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:35,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 14:15:35,081 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash -940767447, now seen corresponding path program 57 times [2021-08-06 14:15:35,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:35,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74832589] [2021-08-06 14:15:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:35,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:35,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:35,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74832589] [2021-08-06 14:15:35,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74832589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:35,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147233528] [2021-08-06 14:15:35,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:35,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:35,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:35,216 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:35,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 14:15:35,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:15:35,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:35,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:35,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:35,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147233528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:35,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:35,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:15:35,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827347887] [2021-08-06 14:15:35,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:35,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:35,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:35,812 INFO L87 Difference]: Start difference. First operand 330 states and 985 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:35,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:35,929 INFO L93 Difference]: Finished difference Result 387 states and 1091 transitions. [2021-08-06 14:15:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:15:35,930 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 [2021-08-06 14:15:35,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:35,941 INFO L225 Difference]: With dead ends: 387 [2021-08-06 14:15:35,942 INFO L226 Difference]: Without dead ends: 384 [2021-08-06 14:15:35,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:15:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-08-06 14:15:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 330. [2021-08-06 14:15:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2021-08-06 14:15:35,947 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 17 [2021-08-06 14:15:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:35,947 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2021-08-06 14:15:35,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2021-08-06 14:15:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:35,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:35,948 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:35,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:36,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-06 14:15:36,149 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:36,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1753761995, now seen corresponding path program 58 times [2021-08-06 14:15:36,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:36,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622591967] [2021-08-06 14:15:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:36,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:36,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:36,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622591967] [2021-08-06 14:15:36,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622591967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:36,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015889754] [2021-08-06 14:15:36,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:36,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:36,407 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:36,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 14:15:36,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:36,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:36,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:36,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:36,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015889754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:36,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:36,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-06 14:15:36,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923697950] [2021-08-06 14:15:36,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:36,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:36,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:36,960 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:37,091 INFO L93 Difference]: Finished difference Result 386 states and 1088 transitions. [2021-08-06 14:15:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:15:37,091 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 [2021-08-06 14:15:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:37,093 INFO L225 Difference]: With dead ends: 386 [2021-08-06 14:15:37,093 INFO L226 Difference]: Without dead ends: 382 [2021-08-06 14:15:37,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:15:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-08-06 14:15:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 330. [2021-08-06 14:15:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.987841945288754) internal successors, (983), 329 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 983 transitions. [2021-08-06 14:15:37,117 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 983 transitions. Word has length 17 [2021-08-06 14:15:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:37,117 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 983 transitions. [2021-08-06 14:15:37,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 983 transitions. [2021-08-06 14:15:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:37,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:37,118 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:37,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:37,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 14:15:37,338 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:37,338 INFO L82 PathProgramCache]: Analyzing trace with hash -615171223, now seen corresponding path program 59 times [2021-08-06 14:15:37,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:37,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008810056] [2021-08-06 14:15:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:37,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:37,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:37,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008810056] [2021-08-06 14:15:37,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008810056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:37,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715618283] [2021-08-06 14:15:37,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:37,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:37,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:37,444 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:37,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 14:15:37,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:15:37,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:37,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:37,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715618283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:37,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:37,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:15:37,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967038530] [2021-08-06 14:15:37,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:37,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:37,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:37,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:37,998 INFO L87 Difference]: Start difference. First operand 330 states and 983 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:38,093 INFO L93 Difference]: Finished difference Result 373 states and 1073 transitions. [2021-08-06 14:15:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:38,094 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 [2021-08-06 14:15:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:38,111 INFO L225 Difference]: With dead ends: 373 [2021-08-06 14:15:38,112 INFO L226 Difference]: Without dead ends: 368 [2021-08-06 14:15:38,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:15:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-06 14:15:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 330. [2021-08-06 14:15:38,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9848024316109423) internal successors, (982), 329 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 982 transitions. [2021-08-06 14:15:38,122 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 982 transitions. Word has length 17 [2021-08-06 14:15:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:38,123 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 982 transitions. [2021-08-06 14:15:38,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 982 transitions. [2021-08-06 14:15:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:38,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:38,124 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:38,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:38,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:38,349 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:38,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:38,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1189984907, now seen corresponding path program 60 times [2021-08-06 14:15:38,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:38,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806744476] [2021-08-06 14:15:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:38,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:38,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:38,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806744476] [2021-08-06 14:15:38,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806744476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:38,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389011229] [2021-08-06 14:15:38,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:38,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:38,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:38,438 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:38,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 14:15:38,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:15:38,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:38,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:39,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389011229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:39,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:39,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:15:39,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194652836] [2021-08-06 14:15:39,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:39,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:39,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:39,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:39,031 INFO L87 Difference]: Start difference. First operand 330 states and 982 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) [2021-08-06 14:15:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:39,103 INFO L93 Difference]: Finished difference Result 521 states and 1403 transitions. [2021-08-06 14:15:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:15:39,103 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 17 [2021-08-06 14:15:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:39,105 INFO L225 Difference]: With dead ends: 521 [2021-08-06 14:15:39,105 INFO L226 Difference]: Without dead ends: 521 [2021-08-06 14:15:39,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-06 14:15:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 386. [2021-08-06 14:15:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.1142857142857143) internal successors, (1199), 385 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1199 transitions. [2021-08-06 14:15:39,122 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1199 transitions. Word has length 17 [2021-08-06 14:15:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:39,122 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1199 transitions. [2021-08-06 14:15:39,122 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) [2021-08-06 14:15:39,122 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1199 transitions. [2021-08-06 14:15:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:39,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:39,123 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:39,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:39,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:39,340 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:39,340 INFO L82 PathProgramCache]: Analyzing trace with hash -281061497, now seen corresponding path program 61 times [2021-08-06 14:15:39,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:39,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305720149] [2021-08-06 14:15:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:39,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:39,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:39,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305720149] [2021-08-06 14:15:39,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305720149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:39,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688921200] [2021-08-06 14:15:39,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:39,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:39,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:39,441 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:39,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 14:15:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:39,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:39,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688921200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:39,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:39,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2021-08-06 14:15:39,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687898333] [2021-08-06 14:15:40,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:40,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:40,002 INFO L87 Difference]: Start difference. First operand 386 states and 1199 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) [2021-08-06 14:15:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:40,083 INFO L93 Difference]: Finished difference Result 507 states and 1373 transitions. [2021-08-06 14:15:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:40,083 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 17 [2021-08-06 14:15:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:40,084 INFO L225 Difference]: With dead ends: 507 [2021-08-06 14:15:40,084 INFO L226 Difference]: Without dead ends: 507 [2021-08-06 14:15:40,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:15:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-08-06 14:15:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 384. [2021-08-06 14:15:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.10443864229765) internal successors, (1189), 383 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1189 transitions. [2021-08-06 14:15:40,092 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1189 transitions. Word has length 17 [2021-08-06 14:15:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:40,092 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1189 transitions. [2021-08-06 14:15:40,092 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) [2021-08-06 14:15:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1189 transitions. [2021-08-06 14:15:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:40,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:40,093 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:40,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:40,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 14:15:40,315 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:40,315 INFO L82 PathProgramCache]: Analyzing trace with hash 574245157, now seen corresponding path program 62 times [2021-08-06 14:15:40,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:40,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909492759] [2021-08-06 14:15:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:40,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:40,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:40,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909492759] [2021-08-06 14:15:40,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909492759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:40,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705289878] [2021-08-06 14:15:40,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:40,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:40,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:40,449 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:40,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 14:15:41,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:41,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:41,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:15:41,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705289878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:41,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:41,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-08-06 14:15:41,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121353710] [2021-08-06 14:15:41,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:41,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:41,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:41,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:41,146 INFO L87 Difference]: Start difference. First operand 384 states and 1189 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) [2021-08-06 14:15:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:41,279 INFO L93 Difference]: Finished difference Result 498 states and 1363 transitions. [2021-08-06 14:15:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:41,280 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 [2021-08-06 14:15:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:41,281 INFO L225 Difference]: With dead ends: 498 [2021-08-06 14:15:41,281 INFO L226 Difference]: Without dead ends: 496 [2021-08-06 14:15:41,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:15:41,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-06 14:15:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 384. [2021-08-06 14:15:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-08-06 14:15:41,286 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-08-06 14:15:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:41,286 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-08-06 14:15:41,286 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) [2021-08-06 14:15:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-08-06 14:15:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:41,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:41,287 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:41,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:41,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 14:15:41,488 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:41,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1318947655, now seen corresponding path program 63 times [2021-08-06 14:15:41,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:41,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104949515] [2021-08-06 14:15:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:41,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:41,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:41,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104949515] [2021-08-06 14:15:41,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104949515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:41,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170241632] [2021-08-06 14:15:41,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:41,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:41,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:41,557 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:41,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 14:15:42,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:15:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:42,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170241632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:42,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:42,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:15:42,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500723719] [2021-08-06 14:15:42,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:42,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:42,137 INFO L87 Difference]: Start difference. First operand 384 states and 1187 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:42,263 INFO L93 Difference]: Finished difference Result 503 states and 1368 transitions. [2021-08-06 14:15:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:15:42,263 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 [2021-08-06 14:15:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:42,264 INFO L225 Difference]: With dead ends: 503 [2021-08-06 14:15:42,264 INFO L226 Difference]: Without dead ends: 500 [2021-08-06 14:15:42,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:15:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-08-06 14:15:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 390. [2021-08-06 14:15:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.107969151670951) internal successors, (1209), 389 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1209 transitions. [2021-08-06 14:15:42,270 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1209 transitions. Word has length 17 [2021-08-06 14:15:42,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:42,270 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1209 transitions. [2021-08-06 14:15:42,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1209 transitions. [2021-08-06 14:15:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:42,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:42,270 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:42,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:42,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:42,471 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:42,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1365078683, now seen corresponding path program 64 times [2021-08-06 14:15:42,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:42,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184604305] [2021-08-06 14:15:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:42,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:42,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:42,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184604305] [2021-08-06 14:15:42,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184604305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:42,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521138749] [2021-08-06 14:15:42,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:42,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:42,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:42,559 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:42,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 14:15:42,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:42,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:42,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:42,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:43,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521138749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:43,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:43,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-06 14:15:43,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892410814] [2021-08-06 14:15:43,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:43,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:43,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:43,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:43,079 INFO L87 Difference]: Start difference. First operand 390 states and 1209 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:43,174 INFO L93 Difference]: Finished difference Result 453 states and 1325 transitions. [2021-08-06 14:15:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:15:43,175 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 [2021-08-06 14:15:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:43,175 INFO L225 Difference]: With dead ends: 453 [2021-08-06 14:15:43,175 INFO L226 Difference]: Without dead ends: 450 [2021-08-06 14:15:43,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:15:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-06 14:15:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-08-06 14:15:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1053984575835476) internal successors, (1208), 389 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1208 transitions. [2021-08-06 14:15:43,180 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1208 transitions. Word has length 17 [2021-08-06 14:15:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:43,181 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1208 transitions. [2021-08-06 14:15:43,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1208 transitions. [2021-08-06 14:15:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:43,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:43,181 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:43,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:43,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 14:15:43,382 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1329450759, now seen corresponding path program 65 times [2021-08-06 14:15:43,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:43,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045076753] [2021-08-06 14:15:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:43,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:43,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:43,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045076753] [2021-08-06 14:15:43,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045076753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:43,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621987983] [2021-08-06 14:15:43,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:43,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:43,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:43,501 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:43,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 14:15:43,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:15:43,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:43,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:44,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621987983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:44,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:44,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:15:44,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103252724] [2021-08-06 14:15:44,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:44,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:44,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:44,033 INFO L87 Difference]: Start difference. First operand 390 states and 1208 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:44,122 INFO L93 Difference]: Finished difference Result 450 states and 1319 transitions. [2021-08-06 14:15:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:15:44,122 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 [2021-08-06 14:15:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:44,123 INFO L225 Difference]: With dead ends: 450 [2021-08-06 14:15:44,123 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 14:15:44,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:15:44,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 14:15:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-08-06 14:15:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 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) [2021-08-06 14:15:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-08-06 14:15:44,128 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-08-06 14:15:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:44,128 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-08-06 14:15:44,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-08-06 14:15:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:44,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:44,129 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:44,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 14:15:44,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 14:15:44,330 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1039482459, now seen corresponding path program 66 times [2021-08-06 14:15:44,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:44,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781762457] [2021-08-06 14:15:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:44,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:44,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:44,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781762457] [2021-08-06 14:15:44,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781762457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:44,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036720511] [2021-08-06 14:15:44,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:44,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:44,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:44,460 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:44,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 14:15:44,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:15:44,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:15:44,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:44,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036720511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:44,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:44,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:15:44,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151545682] [2021-08-06 14:15:44,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:44,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:44,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:44,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:44,979 INFO L87 Difference]: Start difference. First operand 390 states and 1207 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:45,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:45,073 INFO L93 Difference]: Finished difference Result 444 states and 1312 transitions. [2021-08-06 14:15:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:15:45,073 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 [2021-08-06 14:15:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:45,074 INFO L225 Difference]: With dead ends: 444 [2021-08-06 14:15:45,074 INFO L226 Difference]: Without dead ends: 439 [2021-08-06 14:15:45,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:15:45,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-06 14:15:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-08-06 14:15:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-08-06 14:15:45,079 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-08-06 14:15:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:45,079 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-08-06 14:15:45,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-08-06 14:15:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:15:45,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:45,080 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:45,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 14:15:45,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 14:15:45,280 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1461968185, now seen corresponding path program 67 times [2021-08-06 14:15:45,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:45,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169379434] [2021-08-06 14:15:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:45,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:45,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:45,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169379434] [2021-08-06 14:15:45,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169379434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:45,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086698811] [2021-08-06 14:15:45,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:45,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:45,353 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:45,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 14:15:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:15:45,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:45,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086698811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:45,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:45,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-06 14:15:45,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676861331] [2021-08-06 14:15:45,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:15:45,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:15:45,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:15:45,877 INFO L87 Difference]: Start difference. First operand 390 states and 1206 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:45,977 INFO L93 Difference]: Finished difference Result 435 states and 1300 transitions. [2021-08-06 14:15:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:15:45,978 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 [2021-08-06 14:15:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:45,979 INFO L225 Difference]: With dead ends: 435 [2021-08-06 14:15:45,979 INFO L226 Difference]: Without dead ends: 429 [2021-08-06 14:15:45,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:15:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-06 14:15:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-08-06 14:15:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-08-06 14:15:45,986 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-08-06 14:15:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:45,986 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-08-06 14:15:45,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-08-06 14:15:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:15:45,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:45,987 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:46,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:46,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-06 14:15:46,202 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:46,202 INFO L82 PathProgramCache]: Analyzing trace with hash -330098126, now seen corresponding path program 68 times [2021-08-06 14:15:46,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:46,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139483858] [2021-08-06 14:15:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:46,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:46,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:46,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139483858] [2021-08-06 14:15:46,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139483858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:46,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438678741] [2021-08-06 14:15:46,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:46,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:46,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:46,369 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:46,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 14:15:46,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:46,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:15:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:46,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438678741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:46,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:46,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:15:46,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371567601] [2021-08-06 14:15:46,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:15:46,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:46,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:15:46,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:46,963 INFO L87 Difference]: Start difference. First operand 390 states and 1205 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:47,052 INFO L93 Difference]: Finished difference Result 721 states and 2127 transitions. [2021-08-06 14:15:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:15:47,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:15:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:47,054 INFO L225 Difference]: With dead ends: 721 [2021-08-06 14:15:47,054 INFO L226 Difference]: Without dead ends: 721 [2021-08-06 14:15:47,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:15:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-08-06 14:15:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-08-06 14:15:47,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.046770601336303) internal successors, (1368), 449 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1368 transitions. [2021-08-06 14:15:47,061 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1368 transitions. Word has length 18 [2021-08-06 14:15:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:47,061 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1368 transitions. [2021-08-06 14:15:47,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1368 transitions. [2021-08-06 14:15:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:15:47,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:47,061 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:47,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:47,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:47,262 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash -69898281, now seen corresponding path program 69 times [2021-08-06 14:15:47,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:47,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173487622] [2021-08-06 14:15:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:47,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:47,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:47,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173487622] [2021-08-06 14:15:47,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173487622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:47,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797011941] [2021-08-06 14:15:47,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:47,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:47,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:47,445 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:47,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 14:15:47,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:15:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:15:47,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:48,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797011941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:48,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:48,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 14:15:48,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167345822] [2021-08-06 14:15:48,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:15:48,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:48,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:15:48,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:15:48,113 INFO L87 Difference]: Start difference. First operand 450 states and 1368 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:48,272 INFO L93 Difference]: Finished difference Result 819 states and 2403 transitions. [2021-08-06 14:15:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:15:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 19 [2021-08-06 14:15:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:48,274 INFO L225 Difference]: With dead ends: 819 [2021-08-06 14:15:48,274 INFO L226 Difference]: Without dead ends: 819 [2021-08-06 14:15:48,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:15:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-08-06 14:15:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-08-06 14:15:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0056603773584905) internal successors, (1593), 530 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1593 transitions. [2021-08-06 14:15:48,282 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1593 transitions. Word has length 19 [2021-08-06 14:15:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:48,282 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1593 transitions. [2021-08-06 14:15:48,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1593 transitions. [2021-08-06 14:15:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:15:48,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:48,283 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:48,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 14:15:48,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:48,484 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:48,484 INFO L82 PathProgramCache]: Analyzing trace with hash -593637678, now seen corresponding path program 70 times [2021-08-06 14:15:48,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:48,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978498837] [2021-08-06 14:15:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:48,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:48,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:48,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978498837] [2021-08-06 14:15:48,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978498837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:48,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967164186] [2021-08-06 14:15:48,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:48,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:48,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:48,705 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:48,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 14:15:49,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:49,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:15:49,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:49,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967164186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:49,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:49,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:15:49,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383276005] [2021-08-06 14:15:49,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:15:49,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:49,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:15:49,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:15:49,342 INFO L87 Difference]: Start difference. First operand 531 states and 1593 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:49,536 INFO L93 Difference]: Finished difference Result 928 states and 2708 transitions. [2021-08-06 14:15:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:15:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:49,538 INFO L225 Difference]: With dead ends: 928 [2021-08-06 14:15:49,538 INFO L226 Difference]: Without dead ends: 927 [2021-08-06 14:15:49,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:15:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-08-06 14:15:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-08-06 14:15:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9823717948717947) internal successors, (1861), 624 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1861 transitions. [2021-08-06 14:15:49,549 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1861 transitions. Word has length 20 [2021-08-06 14:15:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:49,550 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1861 transitions. [2021-08-06 14:15:49,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1861 transitions. [2021-08-06 14:15:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:15:49,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:49,557 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:49,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 14:15:49,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:49,779 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:49,780 INFO L82 PathProgramCache]: Analyzing trace with hash 350310199, now seen corresponding path program 71 times [2021-08-06 14:15:49,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:49,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908914237] [2021-08-06 14:15:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:49,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:49,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:49,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908914237] [2021-08-06 14:15:49,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908914237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:49,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121393845] [2021-08-06 14:15:49,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:49,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:49,909 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:49,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 14:15:50,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:15:50,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:50,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:15:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:51,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:15:51,016 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 [2021-08-06 14:16:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:00,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121393845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:00,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:00,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:16:00,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966376905] [2021-08-06 14:16:00,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:16:00,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:16:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:16:00,167 INFO L87 Difference]: Start difference. First operand 625 states and 1861 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:00,410 INFO L93 Difference]: Finished difference Result 848 states and 2362 transitions. [2021-08-06 14:16:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:16:00,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 14:16:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:00,413 INFO L225 Difference]: With dead ends: 848 [2021-08-06 14:16:00,413 INFO L226 Difference]: Without dead ends: 845 [2021-08-06 14:16:00,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:16:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-08-06 14:16:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-08-06 14:16:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0347222222222223) internal successors, (2185), 720 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2185 transitions. [2021-08-06 14:16:00,422 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2185 transitions. Word has length 21 [2021-08-06 14:16:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:00,422 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 2185 transitions. [2021-08-06 14:16:00,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2185 transitions. [2021-08-06 14:16:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:16:00,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:00,423 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:00,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 14:16:00,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-06 14:16:00,624 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:00,624 INFO L82 PathProgramCache]: Analyzing trace with hash -34996041, now seen corresponding path program 72 times [2021-08-06 14:16:00,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:00,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881873037] [2021-08-06 14:16:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:00,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:00,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:00,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881873037] [2021-08-06 14:16:00,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881873037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:00,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495065632] [2021-08-06 14:16:00,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:16:00,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:00,738 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:00,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 14:16:01,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:16:01,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:16:01,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:01,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:16:01,766 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 [2021-08-06 14:16:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:13,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495065632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:13,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:13,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:16:13,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070621618] [2021-08-06 14:16:13,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:16:13,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:16:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:16:13,876 INFO L87 Difference]: Start difference. First operand 721 states and 2185 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:16:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:14,155 INFO L93 Difference]: Finished difference Result 961 states and 2738 transitions. [2021-08-06 14:16:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:16:14,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:16:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:14,158 INFO L225 Difference]: With dead ends: 961 [2021-08-06 14:16:14,158 INFO L226 Difference]: Without dead ends: 958 [2021-08-06 14:16:14,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:16:14,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-08-06 14:16:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-08-06 14:16:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.103960396039604) internal successors, (2508), 808 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2508 transitions. [2021-08-06 14:16:14,173 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2508 transitions. Word has length 21 [2021-08-06 14:16:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:14,173 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 2508 transitions. [2021-08-06 14:16:14,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:16:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2508 transitions. [2021-08-06 14:16:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:16:14,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:14,175 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:14,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 14:16:14,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:14,399 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:14,399 INFO L82 PathProgramCache]: Analyzing trace with hash 381323575, now seen corresponding path program 73 times [2021-08-06 14:16:14,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:14,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24483999] [2021-08-06 14:16:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:14,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:14,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:14,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24483999] [2021-08-06 14:16:14,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24483999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:14,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278923112] [2021-08-06 14:16:14,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:16:14,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:14,536 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:14,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 14:16:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:15,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:16:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:15,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:16:15,709 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 [2021-08-06 14:16:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278923112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:27,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:27,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:16:27,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047190184] [2021-08-06 14:16:27,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:16:27,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:16:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:16:27,801 INFO L87 Difference]: Start difference. First operand 809 states and 2508 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:16:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:28,043 INFO L93 Difference]: Finished difference Result 1077 states and 3154 transitions. [2021-08-06 14:16:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:16:28,044 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:16:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:28,046 INFO L225 Difference]: With dead ends: 1077 [2021-08-06 14:16:28,046 INFO L226 Difference]: Without dead ends: 1074 [2021-08-06 14:16:28,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:16:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-08-06 14:16:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-08-06 14:16:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1805251641137855) internal successors, (2907), 914 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2907 transitions. [2021-08-06 14:16:28,063 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2907 transitions. Word has length 21 [2021-08-06 14:16:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:28,063 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2907 transitions. [2021-08-06 14:16:28,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:16:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2907 transitions. [2021-08-06 14:16:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:16:28,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:28,065 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:28,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 14:16:28,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:28,281 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash 402329783, now seen corresponding path program 74 times [2021-08-06 14:16:28,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:28,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856263367] [2021-08-06 14:16:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:28,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:28,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:28,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856263367] [2021-08-06 14:16:28,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856263367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:28,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951709907] [2021-08-06 14:16:28,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:16:28,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:28,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:28,400 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:28,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 14:16:28,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:16:28,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:28,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:16:28,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:29,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:16:29,520 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 [2021-08-06 14:16:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:41,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951709907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:41,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:41,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:16:41,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220602743] [2021-08-06 14:16:41,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:16:41,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:41,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:16:41,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:16:41,181 INFO L87 Difference]: Start difference. First operand 915 states and 2907 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:16:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:41,461 INFO L93 Difference]: Finished difference Result 1210 states and 3651 transitions. [2021-08-06 14:16:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:16:41,461 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:16:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:41,464 INFO L225 Difference]: With dead ends: 1210 [2021-08-06 14:16:41,465 INFO L226 Difference]: Without dead ends: 1207 [2021-08-06 14:16:41,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:16:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-08-06 14:16:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1042. [2021-08-06 14:16:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2593659942363113) internal successors, (3393), 1041 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3393 transitions. [2021-08-06 14:16:41,499 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3393 transitions. Word has length 21 [2021-08-06 14:16:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:41,499 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 3393 transitions. [2021-08-06 14:16:41,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:16:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3393 transitions. [2021-08-06 14:16:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:16:41,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:41,502 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:41,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 14:16:41,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 14:16:41,725 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:41,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:41,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1053522231, now seen corresponding path program 75 times [2021-08-06 14:16:41,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:41,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526881223] [2021-08-06 14:16:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:41,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:41,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:41,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526881223] [2021-08-06 14:16:41,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526881223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:41,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889451590] [2021-08-06 14:16:41,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:16:41,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:41,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:41,837 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:41,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 14:16:42,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:16:42,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:42,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:16:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:42,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:16:42,939 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 [2021-08-06 14:17:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:00,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889451590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:00,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:00,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:17:00,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20624559] [2021-08-06 14:17:00,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:17:00,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:00,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:17:00,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:00,508 INFO L87 Difference]: Start difference. First operand 1042 states and 3393 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:00,884 INFO L93 Difference]: Finished difference Result 1356 states and 4205 transitions. [2021-08-06 14:17:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:17:00,884 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:17:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:00,887 INFO L225 Difference]: With dead ends: 1356 [2021-08-06 14:17:00,887 INFO L226 Difference]: Without dead ends: 1353 [2021-08-06 14:17:00,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:00,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-08-06 14:17:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-08-06 14:17:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3246425567703954) internal successors, (3953), 1189 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3953 transitions. [2021-08-06 14:17:00,906 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3953 transitions. Word has length 21 [2021-08-06 14:17:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:00,907 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 3953 transitions. [2021-08-06 14:17:00,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3953 transitions. [2021-08-06 14:17:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:17:00,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:00,908 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:00,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 14:17:01,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 14:17:01,109 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:01,110 INFO L82 PathProgramCache]: Analyzing trace with hash -234348361, now seen corresponding path program 76 times [2021-08-06 14:17:01,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:01,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825344349] [2021-08-06 14:17:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:01,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:17:01,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:01,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825344349] [2021-08-06 14:17:01,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825344349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:01,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451149474] [2021-08-06 14:17:01,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:17:01,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:01,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:01,253 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:01,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 14:17:01,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:17:01,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:01,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:17:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:02,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:17:02,451 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 [2021-08-06 14:17:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:14,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451149474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:14,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:14,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:17:14,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41649124] [2021-08-06 14:17:14,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:17:14,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:17:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:14,072 INFO L87 Difference]: Start difference. First operand 1190 states and 3953 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:14,763 INFO L93 Difference]: Finished difference Result 1521 states and 4821 transitions. [2021-08-06 14:17:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:17:14,764 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:17:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:14,768 INFO L225 Difference]: With dead ends: 1521 [2021-08-06 14:17:14,768 INFO L226 Difference]: Without dead ends: 1518 [2021-08-06 14:17:14,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-08-06 14:17:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-08-06 14:17:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.378978534418949) internal successors, (4565), 1351 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4565 transitions. [2021-08-06 14:17:14,831 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4565 transitions. Word has length 21 [2021-08-06 14:17:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:14,832 INFO L470 AbstractCegarLoop]: Abstraction has 1352 states and 4565 transitions. [2021-08-06 14:17:14,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4565 transitions. [2021-08-06 14:17:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:17:14,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:14,839 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:14,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:15,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:15,040 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:15,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1503631049, now seen corresponding path program 77 times [2021-08-06 14:17:15,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:15,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069033726] [2021-08-06 14:17:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:15,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:15,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:15,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069033726] [2021-08-06 14:17:15,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069033726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:15,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235633951] [2021-08-06 14:17:15,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:17:15,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:15,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:15,163 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:15,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 14:17:15,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:17:15,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:15,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:17:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:16,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:17:16,412 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 [2021-08-06 14:17:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:28,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235633951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:28,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:28,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:17:28,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527159106] [2021-08-06 14:17:28,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:17:28,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:28,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:17:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:28,657 INFO L87 Difference]: Start difference. First operand 1352 states and 4565 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:29,015 INFO L93 Difference]: Finished difference Result 1650 states and 5282 transitions. [2021-08-06 14:17:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:17:29,016 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:17:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:29,020 INFO L225 Difference]: With dead ends: 1650 [2021-08-06 14:17:29,020 INFO L226 Difference]: Without dead ends: 1647 [2021-08-06 14:17:29,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-08-06 14:17:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-08-06 14:17:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.3962264150943398) internal successors, (5040), 1484 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5040 transitions. [2021-08-06 14:17:29,054 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5040 transitions. Word has length 21 [2021-08-06 14:17:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:29,055 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 5040 transitions. [2021-08-06 14:17:29,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5040 transitions. [2021-08-06 14:17:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:17:29,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:29,057 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:29,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:29,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:29,277 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2098278583, now seen corresponding path program 78 times [2021-08-06 14:17:29,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:29,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293916433] [2021-08-06 14:17:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:29,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:29,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:29,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293916433] [2021-08-06 14:17:29,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293916433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:29,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425218115] [2021-08-06 14:17:29,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:17:29,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:29,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:29,466 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:29,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 14:17:30,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:17:30,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:30,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:17:30,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:30,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:17:30,711 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 [2021-08-06 14:17:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:42,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425218115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:42,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:42,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:17:42,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197024064] [2021-08-06 14:17:42,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:17:42,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:17:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:42,088 INFO L87 Difference]: Start difference. First operand 1485 states and 5040 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:42,432 INFO L93 Difference]: Finished difference Result 1787 states and 5764 transitions. [2021-08-06 14:17:42,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:17:42,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:17:42,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:42,438 INFO L225 Difference]: With dead ends: 1787 [2021-08-06 14:17:42,438 INFO L226 Difference]: Without dead ends: 1784 [2021-08-06 14:17:42,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-08-06 14:17:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-08-06 14:17:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.4092592592592594) internal successors, (5523), 1620 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5523 transitions. [2021-08-06 14:17:42,476 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5523 transitions. Word has length 21 [2021-08-06 14:17:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:42,476 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 5523 transitions. [2021-08-06 14:17:42,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5523 transitions. [2021-08-06 14:17:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:17:42,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:42,480 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:42,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 14:17:42,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-06 14:17:42,697 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:42,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2088327479, now seen corresponding path program 79 times [2021-08-06 14:17:42,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:42,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403688282] [2021-08-06 14:17:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:42,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:42,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:42,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403688282] [2021-08-06 14:17:42,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403688282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:42,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042978374] [2021-08-06 14:17:42,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:17:42,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:42,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:42,816 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:42,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 14:17:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:17:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:44,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:17:44,092 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 [2021-08-06 14:17:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:56,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042978374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:56,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:56,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:17:56,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468715325] [2021-08-06 14:17:56,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:17:56,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:17:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:56,449 INFO L87 Difference]: Start difference. First operand 1621 states and 5523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:56,844 INFO L93 Difference]: Finished difference Result 1931 states and 6250 transitions. [2021-08-06 14:17:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:17:56,844 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:17:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:56,865 INFO L225 Difference]: With dead ends: 1931 [2021-08-06 14:17:56,866 INFO L226 Difference]: Without dead ends: 1928 [2021-08-06 14:17:56,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:17:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-06 14:17:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-08-06 14:17:56,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4116978989210676) internal successors, (6008), 1761 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6008 transitions. [2021-08-06 14:17:56,940 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6008 transitions. Word has length 21 [2021-08-06 14:17:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:56,941 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 6008 transitions. [2021-08-06 14:17:56,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:17:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6008 transitions. [2021-08-06 14:17:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:17:56,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:56,945 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:56,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:57,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:57,163 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:57,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1779843255, now seen corresponding path program 80 times [2021-08-06 14:17:57,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:57,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506778335] [2021-08-06 14:17:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:57,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:57,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:57,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506778335] [2021-08-06 14:17:57,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506778335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:57,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670562411] [2021-08-06 14:17:57,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:17:57,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:57,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:57,349 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:57,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 14:17:58,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:17:58,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:17:58,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:58,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:17:58,693 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 [2021-08-06 14:18:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:11,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670562411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:11,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:11,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:18:11,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037351278] [2021-08-06 14:18:11,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:18:11,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:18:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:18:11,561 INFO L87 Difference]: Start difference. First operand 1762 states and 6008 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:18:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:12,024 INFO L93 Difference]: Finished difference Result 2066 states and 6690 transitions. [2021-08-06 14:18:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:18:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:18:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:12,048 INFO L225 Difference]: With dead ends: 2066 [2021-08-06 14:18:12,048 INFO L226 Difference]: Without dead ends: 2063 [2021-08-06 14:18:12,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:18:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-08-06 14:18:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-08-06 14:18:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4082496033844527) internal successors, (6445), 1891 states have internal predecessors, (6445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6445 transitions. [2021-08-06 14:18:12,133 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6445 transitions. Word has length 21 [2021-08-06 14:18:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:12,133 INFO L470 AbstractCegarLoop]: Abstraction has 1892 states and 6445 transitions. [2021-08-06 14:18:12,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:18:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6445 transitions. [2021-08-06 14:18:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:18:12,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:12,137 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:12,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 14:18:12,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:12,354 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:12,354 INFO L82 PathProgramCache]: Analyzing trace with hash 806766903, now seen corresponding path program 81 times [2021-08-06 14:18:12,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:12,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396822329] [2021-08-06 14:18:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:12,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:12,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:12,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396822329] [2021-08-06 14:18:12,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396822329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:12,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757153332] [2021-08-06 14:18:12,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:18:12,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:12,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:12,486 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:12,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 14:18:13,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:18:13,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:13,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:18:13,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:13,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 14:18:13,957 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 [2021-08-06 14:18:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:28,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757153332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:28,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:28,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 14:18:28,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633430740] [2021-08-06 14:18:28,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 14:18:28,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 14:18:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:18:28,595 INFO L87 Difference]: Start difference. First operand 1892 states and 6445 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:18:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:28,975 INFO L93 Difference]: Finished difference Result 2152 states and 7012 transitions. [2021-08-06 14:18:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:18:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 [2021-08-06 14:18:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:28,980 INFO L225 Difference]: With dead ends: 2152 [2021-08-06 14:18:28,980 INFO L226 Difference]: Without dead ends: 2149 [2021-08-06 14:18:28,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:18:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-08-06 14:18:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-08-06 14:18:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.4074074074074074) internal successors, (6808), 1998 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6808 transitions. [2021-08-06 14:18:29,015 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6808 transitions. Word has length 21 [2021-08-06 14:18:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:29,015 INFO L470 AbstractCegarLoop]: Abstraction has 1999 states and 6808 transitions. [2021-08-06 14:18:29,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-08-06 14:18:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6808 transitions. [2021-08-06 14:18:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:29,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:29,019 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:29,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:29,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-06 14:18:29,241 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2024559836, now seen corresponding path program 82 times [2021-08-06 14:18:29,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:29,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496421399] [2021-08-06 14:18:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:29,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:29,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:29,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496421399] [2021-08-06 14:18:29,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496421399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:29,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951978951] [2021-08-06 14:18:29,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:18:29,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:29,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:29,377 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:29,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 14:18:30,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:18:30,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:30,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:30,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951978951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:30,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:30,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:18:30,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299673611] [2021-08-06 14:18:30,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:18:30,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:18:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:18:30,146 INFO L87 Difference]: Start difference. First operand 1999 states and 6808 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) [2021-08-06 14:18:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:30,566 INFO L93 Difference]: Finished difference Result 2328 states and 7345 transitions. [2021-08-06 14:18:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:18:30,567 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 [2021-08-06 14:18:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:30,573 INFO L225 Difference]: With dead ends: 2328 [2021-08-06 14:18:30,573 INFO L226 Difference]: Without dead ends: 2321 [2021-08-06 14:18:30,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:18:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-08-06 14:18:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 2029. [2021-08-06 14:18:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 3.4018737672583828) internal successors, (6899), 2028 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 6899 transitions. [2021-08-06 14:18:30,660 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 6899 transitions. Word has length 22 [2021-08-06 14:18:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:30,661 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 6899 transitions. [2021-08-06 14:18:30,661 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) [2021-08-06 14:18:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 6899 transitions. [2021-08-06 14:18:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:30,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:30,665 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:30,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:30,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:30,897 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash -452076686, now seen corresponding path program 83 times [2021-08-06 14:18:30,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:30,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979468280] [2021-08-06 14:18:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:30,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:31,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:31,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979468280] [2021-08-06 14:18:31,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979468280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:31,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325988782] [2021-08-06 14:18:31,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:18:31,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:31,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:31,050 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:31,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 14:18:31,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:18:31,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:31,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325988782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:31,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:31,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:18:31,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443475065] [2021-08-06 14:18:31,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:18:31,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:18:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:18:31,866 INFO L87 Difference]: Start difference. First operand 2029 states and 6899 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) [2021-08-06 14:18:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:32,137 INFO L93 Difference]: Finished difference Result 2213 states and 7105 transitions. [2021-08-06 14:18:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:18:32,137 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 [2021-08-06 14:18:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:32,148 INFO L225 Difference]: With dead ends: 2213 [2021-08-06 14:18:32,148 INFO L226 Difference]: Without dead ends: 2207 [2021-08-06 14:18:32,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:18:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-08-06 14:18:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1969. [2021-08-06 14:18:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3780487804878048) internal successors, (6648), 1968 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6648 transitions. [2021-08-06 14:18:32,186 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6648 transitions. Word has length 22 [2021-08-06 14:18:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:32,186 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 6648 transitions. [2021-08-06 14:18:32,186 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) [2021-08-06 14:18:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6648 transitions. [2021-08-06 14:18:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:32,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:32,190 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:32,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:32,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:32,403 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash 71540484, now seen corresponding path program 84 times [2021-08-06 14:18:32,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:32,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838583585] [2021-08-06 14:18:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:32,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:32,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:32,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838583585] [2021-08-06 14:18:32,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838583585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:32,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576023835] [2021-08-06 14:18:32,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:18:32,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:32,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:32,568 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:32,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 14:18:33,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:18:33,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:33,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:33,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:33,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576023835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:33,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:33,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:33,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83171453] [2021-08-06 14:18:33,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:33,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:33,401 INFO L87 Difference]: Start difference. First operand 1969 states and 6648 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) [2021-08-06 14:18:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:33,589 INFO L93 Difference]: Finished difference Result 2016 states and 6715 transitions. [2021-08-06 14:18:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:18:33,590 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 [2021-08-06 14:18:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:33,595 INFO L225 Difference]: With dead ends: 2016 [2021-08-06 14:18:33,596 INFO L226 Difference]: Without dead ends: 2015 [2021-08-06 14:18:33,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:18:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-08-06 14:18:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-08-06 14:18:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.375508130081301) internal successors, (6643), 1968 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6643 transitions. [2021-08-06 14:18:33,630 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6643 transitions. Word has length 22 [2021-08-06 14:18:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:33,630 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 6643 transitions. [2021-08-06 14:18:33,631 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) [2021-08-06 14:18:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6643 transitions. [2021-08-06 14:18:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:33,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:33,635 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:33,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 14:18:33,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 14:18:33,848 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:33,848 INFO L82 PathProgramCache]: Analyzing trace with hash 937624436, now seen corresponding path program 85 times [2021-08-06 14:18:33,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:33,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664983885] [2021-08-06 14:18:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:33,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:34,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:34,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664983885] [2021-08-06 14:18:34,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664983885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:34,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158034507] [2021-08-06 14:18:34,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:18:34,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:34,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:34,016 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:34,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 14:18:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:34,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:34,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158034507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:34,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:34,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:34,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307914962] [2021-08-06 14:18:34,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:34,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:34,915 INFO L87 Difference]: Start difference. First operand 1969 states and 6643 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) [2021-08-06 14:18:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:34,994 INFO L93 Difference]: Finished difference Result 2320 states and 7232 transitions. [2021-08-06 14:18:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:18:34,994 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 [2021-08-06 14:18:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:34,999 INFO L225 Difference]: With dead ends: 2320 [2021-08-06 14:18:34,999 INFO L226 Difference]: Without dead ends: 2320 [2021-08-06 14:18:34,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:18:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-08-06 14:18:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-08-06 14:18:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.366527632950991) internal successors, (6457), 1918 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6457 transitions. [2021-08-06 14:18:35,041 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6457 transitions. Word has length 22 [2021-08-06 14:18:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:35,041 INFO L470 AbstractCegarLoop]: Abstraction has 1919 states and 6457 transitions. [2021-08-06 14:18:35,041 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) [2021-08-06 14:18:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6457 transitions. [2021-08-06 14:18:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:35,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:35,045 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:35,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:35,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:35,269 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:35,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:35,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1084151388, now seen corresponding path program 86 times [2021-08-06 14:18:35,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:35,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734052919] [2021-08-06 14:18:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:35,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:35,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:35,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734052919] [2021-08-06 14:18:35,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734052919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:35,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132070579] [2021-08-06 14:18:35,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:18:35,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:35,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:35,395 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:35,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 14:18:36,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:18:36,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:36,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:36,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132070579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:36,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:36,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:36,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362160406] [2021-08-06 14:18:36,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:36,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:36,285 INFO L87 Difference]: Start difference. First operand 1919 states and 6457 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) [2021-08-06 14:18:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:36,528 INFO L93 Difference]: Finished difference Result 2212 states and 6901 transitions. [2021-08-06 14:18:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:18:36,528 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 [2021-08-06 14:18:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:36,534 INFO L225 Difference]: With dead ends: 2212 [2021-08-06 14:18:36,534 INFO L226 Difference]: Without dead ends: 2210 [2021-08-06 14:18:36,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:18:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-08-06 14:18:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1931. [2021-08-06 14:18:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.366321243523316) internal successors, (6497), 1930 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 6497 transitions. [2021-08-06 14:18:36,571 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 6497 transitions. Word has length 22 [2021-08-06 14:18:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:36,571 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 6497 transitions. [2021-08-06 14:18:36,571 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) [2021-08-06 14:18:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 6497 transitions. [2021-08-06 14:18:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:36,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:36,575 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:36,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 14:18:36,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:36,797 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:36,797 INFO L82 PathProgramCache]: Analyzing trace with hash -421063310, now seen corresponding path program 87 times [2021-08-06 14:18:36,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:36,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802993052] [2021-08-06 14:18:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:36,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:36,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:36,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802993052] [2021-08-06 14:18:36,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802993052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:36,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899383202] [2021-08-06 14:18:36,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:18:36,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:36,955 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:36,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 14:18:37,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:18:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:37,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899383202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:37,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:37,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:37,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117628004] [2021-08-06 14:18:37,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:37,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:37,840 INFO L87 Difference]: Start difference. First operand 1931 states and 6497 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) [2021-08-06 14:18:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:38,009 INFO L93 Difference]: Finished difference Result 2222 states and 6950 transitions. [2021-08-06 14:18:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:18:38,010 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 [2021-08-06 14:18:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:38,016 INFO L225 Difference]: With dead ends: 2222 [2021-08-06 14:18:38,016 INFO L226 Difference]: Without dead ends: 2222 [2021-08-06 14:18:38,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:18:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-08-06 14:18:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1928. [2021-08-06 14:18:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.342501297353399) internal successors, (6441), 1927 states have internal predecessors, (6441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6441 transitions. [2021-08-06 14:18:38,077 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6441 transitions. Word has length 22 [2021-08-06 14:18:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:38,077 INFO L470 AbstractCegarLoop]: Abstraction has 1928 states and 6441 transitions. [2021-08-06 14:18:38,077 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) [2021-08-06 14:18:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6441 transitions. [2021-08-06 14:18:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:38,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:38,081 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:38,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:38,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:38,305 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash 487860100, now seen corresponding path program 88 times [2021-08-06 14:18:38,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:38,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698610618] [2021-08-06 14:18:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:38,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:38,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:38,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698610618] [2021-08-06 14:18:38,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698610618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:38,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681273048] [2021-08-06 14:18:38,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:18:38,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:38,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:38,505 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:38,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 14:18:39,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:18:39,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:39,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:39,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:39,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681273048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:39,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:39,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:39,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449568810] [2021-08-06 14:18:39,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:39,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:39,520 INFO L87 Difference]: Start difference. First operand 1928 states and 6441 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) [2021-08-06 14:18:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:39,723 INFO L93 Difference]: Finished difference Result 2091 states and 6664 transitions. [2021-08-06 14:18:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:18:39,723 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 [2021-08-06 14:18:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:39,729 INFO L225 Difference]: With dead ends: 2091 [2021-08-06 14:18:39,730 INFO L226 Difference]: Without dead ends: 2089 [2021-08-06 14:18:39,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:18:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-08-06 14:18:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-08-06 14:18:39,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3437334743521947) internal successors, (6323), 1891 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6323 transitions. [2021-08-06 14:18:39,763 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6323 transitions. Word has length 22 [2021-08-06 14:18:39,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:39,763 INFO L470 AbstractCegarLoop]: Abstraction has 1892 states and 6323 transitions. [2021-08-06 14:18:39,763 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) [2021-08-06 14:18:39,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6323 transitions. [2021-08-06 14:18:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:39,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:39,766 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:39,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:39,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-06 14:18:39,989 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:39,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1353944052, now seen corresponding path program 89 times [2021-08-06 14:18:39,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:39,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379633567] [2021-08-06 14:18:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:39,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:40,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:40,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379633567] [2021-08-06 14:18:40,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379633567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:40,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68966820] [2021-08-06 14:18:40,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:18:40,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:40,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:40,171 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:40,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 14:18:40,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:18:40,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:40,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:40,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68966820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:40,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:40,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:40,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143964682] [2021-08-06 14:18:40,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:40,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:40,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:40,977 INFO L87 Difference]: Start difference. First operand 1892 states and 6323 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) [2021-08-06 14:18:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:41,054 INFO L93 Difference]: Finished difference Result 2273 states and 6967 transitions. [2021-08-06 14:18:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:18:41,055 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 [2021-08-06 14:18:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:41,059 INFO L225 Difference]: With dead ends: 2273 [2021-08-06 14:18:41,060 INFO L226 Difference]: Without dead ends: 2273 [2021-08-06 14:18:41,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:18:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-08-06 14:18:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-08-06 14:18:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3430079155672825) internal successors, (6335), 1895 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6335 transitions. [2021-08-06 14:18:41,100 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6335 transitions. Word has length 22 [2021-08-06 14:18:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:41,100 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 6335 transitions. [2021-08-06 14:18:41,100 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) [2021-08-06 14:18:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6335 transitions. [2021-08-06 14:18:41,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:41,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:41,104 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:41,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:41,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:41,317 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:41,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:41,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1343166754, now seen corresponding path program 90 times [2021-08-06 14:18:41,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:41,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076981398] [2021-08-06 14:18:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:41,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:41,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:41,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076981398] [2021-08-06 14:18:41,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076981398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:41,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309360573] [2021-08-06 14:18:41,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:18:41,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:41,491 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:41,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 14:18:42,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:18:42,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:42,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:42,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:42,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309360573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:42,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:42,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:18:42,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702075030] [2021-08-06 14:18:42,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:18:42,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:42,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:18:42,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:18:42,406 INFO L87 Difference]: Start difference. First operand 1896 states and 6335 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:42,641 INFO L93 Difference]: Finished difference Result 2019 states and 6514 transitions. [2021-08-06 14:18:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:18:42,641 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 [2021-08-06 14:18:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:42,645 INFO L225 Difference]: With dead ends: 2019 [2021-08-06 14:18:42,645 INFO L226 Difference]: Without dead ends: 2017 [2021-08-06 14:18:42,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:18:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-08-06 14:18:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-08-06 14:18:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3403693931398415) internal successors, (6330), 1895 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6330 transitions. [2021-08-06 14:18:42,682 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6330 transitions. Word has length 22 [2021-08-06 14:18:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:42,682 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 6330 transitions. [2021-08-06 14:18:42,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6330 transitions. [2021-08-06 14:18:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:42,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:42,686 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:42,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:42,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:42,893 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1230409936, now seen corresponding path program 91 times [2021-08-06 14:18:42,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:42,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601842222] [2021-08-06 14:18:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:42,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:43,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:43,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601842222] [2021-08-06 14:18:43,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601842222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:43,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385497653] [2021-08-06 14:18:43,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:18:43,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:43,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:43,093 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:43,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 14:18:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:43,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:43,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385497653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:43,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:43,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:18:43,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734382829] [2021-08-06 14:18:43,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:18:43,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:43,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:18:43,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:18:43,985 INFO L87 Difference]: Start difference. First operand 1896 states and 6330 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:44,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:44,110 INFO L93 Difference]: Finished difference Result 2414 states and 7318 transitions. [2021-08-06 14:18:44,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:18:44,111 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 [2021-08-06 14:18:44,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:44,116 INFO L225 Difference]: With dead ends: 2414 [2021-08-06 14:18:44,116 INFO L226 Difference]: Without dead ends: 2414 [2021-08-06 14:18:44,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:18:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-08-06 14:18:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-08-06 14:18:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3304395008138905) internal successors, (6138), 1843 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6138 transitions. [2021-08-06 14:18:44,159 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6138 transitions. Word has length 22 [2021-08-06 14:18:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:44,159 INFO L470 AbstractCegarLoop]: Abstraction has 1844 states and 6138 transitions. [2021-08-06 14:18:44,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6138 transitions. [2021-08-06 14:18:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:44,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:44,164 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:44,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:44,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:44,388 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:44,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1063145180, now seen corresponding path program 92 times [2021-08-06 14:18:44,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:44,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33670270] [2021-08-06 14:18:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:44,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:44,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:44,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33670270] [2021-08-06 14:18:44,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33670270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:44,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875473403] [2021-08-06 14:18:44,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:18:44,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:44,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:44,536 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:44,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 14:18:45,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:18:45,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:45,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:45,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:45,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875473403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:45,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:45,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:45,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054607771] [2021-08-06 14:18:45,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:45,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:45,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:45,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:45,383 INFO L87 Difference]: Start difference. First operand 1844 states and 6138 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) [2021-08-06 14:18:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:45,624 INFO L93 Difference]: Finished difference Result 2136 states and 6581 transitions. [2021-08-06 14:18:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:18:45,624 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 [2021-08-06 14:18:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:45,629 INFO L225 Difference]: With dead ends: 2136 [2021-08-06 14:18:45,629 INFO L226 Difference]: Without dead ends: 2134 [2021-08-06 14:18:45,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:18:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-08-06 14:18:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1858. [2021-08-06 14:18:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.329025309639203) internal successors, (6182), 1857 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6182 transitions. [2021-08-06 14:18:45,665 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6182 transitions. Word has length 22 [2021-08-06 14:18:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:45,666 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6182 transitions. [2021-08-06 14:18:45,666 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) [2021-08-06 14:18:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6182 transitions. [2021-08-06 14:18:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:45,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:45,670 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:45,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:45,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:45,889 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:45,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:45,889 INFO L82 PathProgramCache]: Analyzing trace with hash -400057102, now seen corresponding path program 93 times [2021-08-06 14:18:45,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:45,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847446975] [2021-08-06 14:18:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:45,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:46,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:46,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847446975] [2021-08-06 14:18:46,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847446975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:46,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078201207] [2021-08-06 14:18:46,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:18:46,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:46,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:46,067 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:46,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 14:18:46,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:18:46,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:46,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:46,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078201207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:46,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:46,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:46,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466567584] [2021-08-06 14:18:46,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:46,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:46,972 INFO L87 Difference]: Start difference. First operand 1858 states and 6182 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) [2021-08-06 14:18:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:47,132 INFO L93 Difference]: Finished difference Result 2136 states and 6601 transitions. [2021-08-06 14:18:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:18:47,132 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 [2021-08-06 14:18:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:47,136 INFO L225 Difference]: With dead ends: 2136 [2021-08-06 14:18:47,136 INFO L226 Difference]: Without dead ends: 2136 [2021-08-06 14:18:47,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:18:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-08-06 14:18:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1820. [2021-08-06 14:18:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.3062122045079714) internal successors, (6014), 1819 states have internal predecessors, (6014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6014 transitions. [2021-08-06 14:18:47,171 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6014 transitions. Word has length 22 [2021-08-06 14:18:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:47,171 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 6014 transitions. [2021-08-06 14:18:47,172 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) [2021-08-06 14:18:47,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6014 transitions. [2021-08-06 14:18:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:47,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:47,175 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:47,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:47,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 14:18:47,401 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash 508866308, now seen corresponding path program 94 times [2021-08-06 14:18:47,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:47,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977330476] [2021-08-06 14:18:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:47,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:47,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:47,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977330476] [2021-08-06 14:18:47,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977330476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:47,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418953976] [2021-08-06 14:18:47,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:18:47,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:47,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:47,593 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:47,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 14:18:48,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:18:48,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:48,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:48,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:48,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418953976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:48,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:48,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:48,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387267452] [2021-08-06 14:18:48,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:48,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:48,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:48,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:48,783 INFO L87 Difference]: Start difference. First operand 1820 states and 6014 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) [2021-08-06 14:18:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:48,974 INFO L93 Difference]: Finished difference Result 1994 states and 6256 transitions. [2021-08-06 14:18:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:18:48,975 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 [2021-08-06 14:18:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:48,978 INFO L225 Difference]: With dead ends: 1994 [2021-08-06 14:18:48,978 INFO L226 Difference]: Without dead ends: 1992 [2021-08-06 14:18:48,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:18:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-08-06 14:18:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-08-06 14:18:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.304083885209713) internal successors, (5987), 1812 states have internal predecessors, (5987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5987 transitions. [2021-08-06 14:18:49,002 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5987 transitions. Word has length 22 [2021-08-06 14:18:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:49,002 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 5987 transitions. [2021-08-06 14:18:49,002 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) [2021-08-06 14:18:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5987 transitions. [2021-08-06 14:18:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:49,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:49,004 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:49,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:49,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 14:18:49,205 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:49,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1374950260, now seen corresponding path program 95 times [2021-08-06 14:18:49,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:49,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018181944] [2021-08-06 14:18:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:49,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:49,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:49,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018181944] [2021-08-06 14:18:49,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018181944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:49,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539114966] [2021-08-06 14:18:49,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:18:49,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:49,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:49,458 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:49,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 14:18:50,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:18:50,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:50,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:50,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:50,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539114966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:50,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:50,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:50,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816893253] [2021-08-06 14:18:50,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:50,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:50,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:50,295 INFO L87 Difference]: Start difference. First operand 1813 states and 5987 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) [2021-08-06 14:18:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:50,368 INFO L93 Difference]: Finished difference Result 2201 states and 6647 transitions. [2021-08-06 14:18:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:18:50,369 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 [2021-08-06 14:18:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:50,372 INFO L225 Difference]: With dead ends: 2201 [2021-08-06 14:18:50,372 INFO L226 Difference]: Without dead ends: 2201 [2021-08-06 14:18:50,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:18:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-08-06 14:18:50,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-08-06 14:18:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.303581267217631) internal successors, (5996), 1815 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5996 transitions. [2021-08-06 14:18:50,399 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5996 transitions. Word has length 22 [2021-08-06 14:18:50,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:50,399 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 5996 transitions. [2021-08-06 14:18:50,399 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) [2021-08-06 14:18:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5996 transitions. [2021-08-06 14:18:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:50,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:50,402 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:50,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:50,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:50,603 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:50,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:50,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1364172962, now seen corresponding path program 96 times [2021-08-06 14:18:50,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:50,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003642174] [2021-08-06 14:18:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:50,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:50,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:50,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003642174] [2021-08-06 14:18:50,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003642174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:50,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273955088] [2021-08-06 14:18:50,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:18:50,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:50,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:50,775 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:50,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 14:18:51,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:18:51,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:51,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273955088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:51,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:51,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:18:51,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080584425] [2021-08-06 14:18:51,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:18:51,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:18:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:18:51,676 INFO L87 Difference]: Start difference. First operand 1816 states and 5996 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:51,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:51,871 INFO L93 Difference]: Finished difference Result 1990 states and 6241 transitions. [2021-08-06 14:18:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:18:51,872 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 [2021-08-06 14:18:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:51,876 INFO L225 Difference]: With dead ends: 1990 [2021-08-06 14:18:51,876 INFO L226 Difference]: Without dead ends: 1988 [2021-08-06 14:18:51,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:18:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-08-06 14:18:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-08-06 14:18:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.3008264462809915) internal successors, (5991), 1815 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5991 transitions. [2021-08-06 14:18:51,906 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5991 transitions. Word has length 22 [2021-08-06 14:18:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:51,906 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 5991 transitions. [2021-08-06 14:18:51,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5991 transitions. [2021-08-06 14:18:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:51,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:51,909 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:51,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 14:18:52,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:52,109 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:52,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:52,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1209403728, now seen corresponding path program 97 times [2021-08-06 14:18:52,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:52,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914749372] [2021-08-06 14:18:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:52,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:52,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:52,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914749372] [2021-08-06 14:18:52,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914749372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:52,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277898170] [2021-08-06 14:18:52,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:18:52,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:52,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:52,210 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:52,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 14:18:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:53,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277898170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:53,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:53,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:18:53,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549892296] [2021-08-06 14:18:53,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:18:53,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:53,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:18:53,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:18:53,059 INFO L87 Difference]: Start difference. First operand 1816 states and 5991 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:53,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:53,154 INFO L93 Difference]: Finished difference Result 2351 states and 7004 transitions. [2021-08-06 14:18:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:18:53,155 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 [2021-08-06 14:18:53,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:53,158 INFO L225 Difference]: With dead ends: 2351 [2021-08-06 14:18:53,159 INFO L226 Difference]: Without dead ends: 2351 [2021-08-06 14:18:53,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:18:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-08-06 14:18:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-08-06 14:18:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2870005627462016) internal successors, (5841), 1777 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5841 transitions. [2021-08-06 14:18:53,189 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5841 transitions. Word has length 22 [2021-08-06 14:18:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:53,189 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 5841 transitions. [2021-08-06 14:18:53,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5841 transitions. [2021-08-06 14:18:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:53,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:53,191 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:53,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:53,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 14:18:53,392 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2108875460, now seen corresponding path program 98 times [2021-08-06 14:18:53,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:53,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629922250] [2021-08-06 14:18:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:53,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:53,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:53,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629922250] [2021-08-06 14:18:53,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629922250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:53,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554961307] [2021-08-06 14:18:53,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:18:53,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:53,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:53,518 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:53,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 14:18:54,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:18:54,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:54,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:54,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:54,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554961307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:54,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:54,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:18:54,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454567870] [2021-08-06 14:18:54,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:18:54,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:54,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:18:54,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:18:54,471 INFO L87 Difference]: Start difference. First operand 1778 states and 5841 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:54,648 INFO L93 Difference]: Finished difference Result 1995 states and 6382 transitions. [2021-08-06 14:18:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:18:54,649 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 [2021-08-06 14:18:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:54,651 INFO L225 Difference]: With dead ends: 1995 [2021-08-06 14:18:54,652 INFO L226 Difference]: Without dead ends: 1992 [2021-08-06 14:18:54,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:18:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-08-06 14:18:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-08-06 14:18:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2863559797866366) internal successors, (5853), 1781 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5853 transitions. [2021-08-06 14:18:54,673 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5853 transitions. Word has length 22 [2021-08-06 14:18:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:54,673 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 5853 transitions. [2021-08-06 14:18:54,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5853 transitions. [2021-08-06 14:18:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:54,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:54,675 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:54,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 14:18:54,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:54,876 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:54,876 INFO L82 PathProgramCache]: Analyzing trace with hash 280001268, now seen corresponding path program 99 times [2021-08-06 14:18:54,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:54,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854234907] [2021-08-06 14:18:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:54,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:54,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:54,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854234907] [2021-08-06 14:18:54,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854234907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:54,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421193289] [2021-08-06 14:18:54,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:18:54,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:54,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:54,991 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:54,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 14:18:55,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:18:55,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:55,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:55,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421193289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:55,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:55,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:18:55,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027439114] [2021-08-06 14:18:55,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:18:55,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:55,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:18:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:18:55,869 INFO L87 Difference]: Start difference. First operand 1782 states and 5853 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:56,006 INFO L93 Difference]: Finished difference Result 3202 states and 10139 transitions. [2021-08-06 14:18:56,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:18:56,007 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 [2021-08-06 14:18:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:56,012 INFO L225 Difference]: With dead ends: 3202 [2021-08-06 14:18:56,012 INFO L226 Difference]: Without dead ends: 3202 [2021-08-06 14:18:56,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:18:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-08-06 14:18:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-08-06 14:18:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.4375993640699525) internal successors, (8649), 2516 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8649 transitions. [2021-08-06 14:18:56,049 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8649 transitions. Word has length 22 [2021-08-06 14:18:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:56,049 INFO L470 AbstractCegarLoop]: Abstraction has 2517 states and 8649 transitions. [2021-08-06 14:18:56,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8649 transitions. [2021-08-06 14:18:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:56,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:56,052 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:56,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 14:18:56,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 14:18:56,252 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:56,253 INFO L82 PathProgramCache]: Analyzing trace with hash -411952732, now seen corresponding path program 100 times [2021-08-06 14:18:56,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:56,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833803722] [2021-08-06 14:18:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:56,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:56,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:56,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833803722] [2021-08-06 14:18:56,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833803722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:56,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733665650] [2021-08-06 14:18:56,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:18:56,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:56,375 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:56,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 14:18:57,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:18:57,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:57,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:57,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733665650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:57,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:57,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:57,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780022726] [2021-08-06 14:18:57,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:57,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:57,300 INFO L87 Difference]: Start difference. First operand 2517 states and 8649 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) [2021-08-06 14:18:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:57,484 INFO L93 Difference]: Finished difference Result 2830 states and 9178 transitions. [2021-08-06 14:18:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:18:57,484 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 [2021-08-06 14:18:57,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:57,489 INFO L225 Difference]: With dead ends: 2830 [2021-08-06 14:18:57,489 INFO L226 Difference]: Without dead ends: 2828 [2021-08-06 14:18:57,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:18:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-08-06 14:18:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2556. [2021-08-06 14:18:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 3.4332681017612523) internal successors, (8772), 2555 states have internal predecessors, (8772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 8772 transitions. [2021-08-06 14:18:57,530 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 8772 transitions. Word has length 22 [2021-08-06 14:18:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:57,530 INFO L470 AbstractCegarLoop]: Abstraction has 2556 states and 8772 transitions. [2021-08-06 14:18:57,530 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) [2021-08-06 14:18:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 8772 transitions. [2021-08-06 14:18:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:57,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:57,533 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:57,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 14:18:57,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 14:18:57,734 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:57,734 INFO L82 PathProgramCache]: Analyzing trace with hash 251135346, now seen corresponding path program 101 times [2021-08-06 14:18:57,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:57,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425676293] [2021-08-06 14:18:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:57,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:57,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:57,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425676293] [2021-08-06 14:18:57,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425676293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:57,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327583706] [2021-08-06 14:18:57,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:18:57,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:57,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:57,834 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:57,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 14:18:58,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:18:58,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:58,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:18:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:58,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327583706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:58,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:58,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:18:58,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303587429] [2021-08-06 14:18:58,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:18:58,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:58,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:18:58,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:58,714 INFO L87 Difference]: Start difference. First operand 2556 states and 8772 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) [2021-08-06 14:18:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:58,860 INFO L93 Difference]: Finished difference Result 2824 states and 9108 transitions. [2021-08-06 14:18:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:18:58,861 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 [2021-08-06 14:18:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:58,867 INFO L225 Difference]: With dead ends: 2824 [2021-08-06 14:18:58,867 INFO L226 Difference]: Without dead ends: 2824 [2021-08-06 14:18:58,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:18:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-08-06 14:18:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2476. [2021-08-06 14:18:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-08-06 14:18:58,903 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-08-06 14:18:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:58,903 INFO L470 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-08-06 14:18:58,903 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) [2021-08-06 14:18:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-08-06 14:18:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:18:58,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:58,906 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:58,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 14:18:59,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-06 14:18:59,107 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:59,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1160058756, now seen corresponding path program 102 times [2021-08-06 14:18:59,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:59,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748852000] [2021-08-06 14:18:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:59,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:59,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:59,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748852000] [2021-08-06 14:18:59,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748852000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:59,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561829855] [2021-08-06 14:18:59,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:18:59,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:59,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:59,217 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:59,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 14:19:00,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:19:00,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:00,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:00,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561829855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:00,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:00,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:19:00,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493791630] [2021-08-06 14:19:00,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:19:00,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:19:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:19:00,192 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 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) [2021-08-06 14:19:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:00,377 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-08-06 14:19:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:19:00,377 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 [2021-08-06 14:19:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:00,383 INFO L225 Difference]: With dead ends: 2659 [2021-08-06 14:19:00,383 INFO L226 Difference]: Without dead ends: 2657 [2021-08-06 14:19:00,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:19:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-08-06 14:19:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-08-06 14:19:00,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-08-06 14:19:00,425 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-08-06 14:19:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:00,426 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-08-06 14:19:00,426 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) [2021-08-06 14:19:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-08-06 14:19:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:00,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:00,429 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:00,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 14:19:00,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:00,630 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:00,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2026142708, now seen corresponding path program 103 times [2021-08-06 14:19:00,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:00,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061151514] [2021-08-06 14:19:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:00,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:00,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:00,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061151514] [2021-08-06 14:19:00,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061151514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:00,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119551500] [2021-08-06 14:19:00,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:19:00,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:00,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:00,736 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:00,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 14:19:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:01,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:01,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:01,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119551500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:01,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:01,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:19:01,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201982553] [2021-08-06 14:19:01,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:19:01,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:01,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:19:01,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:19:01,639 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 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) [2021-08-06 14:19:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:01,716 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-08-06 14:19:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:19:01,716 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 [2021-08-06 14:19:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:01,720 INFO L225 Difference]: With dead ends: 2808 [2021-08-06 14:19:01,720 INFO L226 Difference]: Without dead ends: 2808 [2021-08-06 14:19:01,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-08-06 14:19:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-08-06 14:19:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-08-06 14:19:01,755 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-08-06 14:19:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:01,755 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-08-06 14:19:01,756 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) [2021-08-06 14:19:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-08-06 14:19:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:01,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:01,758 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:01,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:01,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:01,971 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:01,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:01,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2015365410, now seen corresponding path program 104 times [2021-08-06 14:19:01,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:01,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658260230] [2021-08-06 14:19:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:01,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:02,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:02,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658260230] [2021-08-06 14:19:02,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658260230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:02,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556371914] [2021-08-06 14:19:02,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:19:02,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:02,072 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:02,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 14:19:02,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:19:02,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:02,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:02,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556371914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:02,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:02,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:02,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696932145] [2021-08-06 14:19:02,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:02,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:02,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:02,996 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:03,202 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-08-06 14:19:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:19:03,202 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 [2021-08-06 14:19:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:03,206 INFO L225 Difference]: With dead ends: 2648 [2021-08-06 14:19:03,207 INFO L226 Difference]: Without dead ends: 2646 [2021-08-06 14:19:03,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:19:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-08-06 14:19:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-08-06 14:19:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-08-06 14:19:03,241 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-08-06 14:19:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:03,241 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-08-06 14:19:03,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-08-06 14:19:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:03,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:03,243 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:03,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 14:19:03,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 14:19:03,444 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:03,444 INFO L82 PathProgramCache]: Analyzing trace with hash -558211280, now seen corresponding path program 105 times [2021-08-06 14:19:03,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:03,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874740890] [2021-08-06 14:19:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:03,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:03,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:03,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874740890] [2021-08-06 14:19:03,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874740890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:03,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183485530] [2021-08-06 14:19:03,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:19:03,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:03,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:03,565 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:03,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 14:19:04,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:19:04,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:04,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183485530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:04,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:04,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:04,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854807082] [2021-08-06 14:19:04,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:04,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:04,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:04,504 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:04,603 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-08-06 14:19:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:19:04,603 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 [2021-08-06 14:19:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:04,608 INFO L225 Difference]: With dead ends: 2940 [2021-08-06 14:19:04,608 INFO L226 Difference]: Without dead ends: 2940 [2021-08-06 14:19:04,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:19:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-08-06 14:19:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-08-06 14:19:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-08-06 14:19:04,645 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-08-06 14:19:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:04,645 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-08-06 14:19:04,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:04,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-08-06 14:19:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:04,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:04,648 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:04,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 14:19:04,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:04,849 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:04,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1534899388, now seen corresponding path program 106 times [2021-08-06 14:19:04,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:04,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302771278] [2021-08-06 14:19:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:04,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:04,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:04,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302771278] [2021-08-06 14:19:04,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302771278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:04,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069442733] [2021-08-06 14:19:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:19:04,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:04,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:04,978 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:04,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 14:19:05,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:19:05,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:05,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069442733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:05,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:05,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:05,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913911234] [2021-08-06 14:19:05,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:05,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:05,926 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:06,122 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-08-06 14:19:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:19:06,122 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 [2021-08-06 14:19:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:06,126 INFO L225 Difference]: With dead ends: 2660 [2021-08-06 14:19:06,126 INFO L226 Difference]: Without dead ends: 2657 [2021-08-06 14:19:06,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:19:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-08-06 14:19:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-08-06 14:19:06,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-08-06 14:19:06,164 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-08-06 14:19:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:06,164 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-08-06 14:19:06,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-08-06 14:19:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:06,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:06,167 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:06,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 14:19:06,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:06,368 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:06,368 INFO L82 PathProgramCache]: Analyzing trace with hash 931193716, now seen corresponding path program 107 times [2021-08-06 14:19:06,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:06,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374143868] [2021-08-06 14:19:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:06,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:06,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:06,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374143868] [2021-08-06 14:19:06,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374143868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:06,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293874538] [2021-08-06 14:19:06,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:19:06,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:06,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:06,485 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:06,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 14:19:07,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:19:07,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:07,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:07,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293874538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:07,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:07,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:07,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717925268] [2021-08-06 14:19:07,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:07,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:07,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:07,429 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:07,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:07,542 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-08-06 14:19:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:19:07,542 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 [2021-08-06 14:19:07,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:07,549 INFO L225 Difference]: With dead ends: 4123 [2021-08-06 14:19:07,549 INFO L226 Difference]: Without dead ends: 4123 [2021-08-06 14:19:07,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:19:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-08-06 14:19:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-08-06 14:19:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-08-06 14:19:07,635 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-08-06 14:19:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:07,636 INFO L470 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-08-06 14:19:07,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-08-06 14:19:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:07,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:07,640 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:07,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:07,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:07,844 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:07,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:07,845 INFO L82 PathProgramCache]: Analyzing trace with hash 76041570, now seen corresponding path program 108 times [2021-08-06 14:19:07,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:07,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125198178] [2021-08-06 14:19:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:07,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:07,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:07,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125198178] [2021-08-06 14:19:07,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125198178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:07,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613289666] [2021-08-06 14:19:07,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:19:07,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:07,964 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:07,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 14:19:08,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:19:08,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:08,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613289666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:08,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:08,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:08,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957788335] [2021-08-06 14:19:08,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:08,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:08,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:08,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:08,910 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:09,109 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-08-06 14:19:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:19:09,110 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 [2021-08-06 14:19:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:09,115 INFO L225 Difference]: With dead ends: 3810 [2021-08-06 14:19:09,116 INFO L226 Difference]: Without dead ends: 3806 [2021-08-06 14:19:09,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:19:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-08-06 14:19:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-08-06 14:19:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-08-06 14:19:09,170 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-08-06 14:19:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:09,171 INFO L470 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-08-06 14:19:09,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-08-06 14:19:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:09,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:09,174 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:09,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 14:19:09,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 14:19:09,374 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:09,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:09,375 INFO L82 PathProgramCache]: Analyzing trace with hash -141891664, now seen corresponding path program 109 times [2021-08-06 14:19:09,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:09,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17557198] [2021-08-06 14:19:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:09,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:09,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:09,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17557198] [2021-08-06 14:19:09,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17557198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:09,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519065367] [2021-08-06 14:19:09,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:19:09,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:09,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:09,498 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:09,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 14:19:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:10,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:10,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519065367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:10,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:10,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:10,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429248986] [2021-08-06 14:19:10,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:10,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:10,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:10,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:10,453 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:10,642 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-08-06 14:19:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:19:10,643 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 [2021-08-06 14:19:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:10,653 INFO L225 Difference]: With dead ends: 5567 [2021-08-06 14:19:10,653 INFO L226 Difference]: Without dead ends: 5567 [2021-08-06 14:19:10,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:19:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-08-06 14:19:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-08-06 14:19:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-08-06 14:19:10,768 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-08-06 14:19:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:10,768 INFO L470 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-08-06 14:19:10,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-08-06 14:19:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:10,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:10,773 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:10,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 14:19:10,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 14:19:10,973 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1699823324, now seen corresponding path program 110 times [2021-08-06 14:19:10,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:10,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115671471] [2021-08-06 14:19:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:10,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:11,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:11,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115671471] [2021-08-06 14:19:11,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115671471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:11,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918081932] [2021-08-06 14:19:11,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:19:11,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:11,091 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:11,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 14:19:11,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:19:11,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:11,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:12,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918081932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:12,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:12,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:19:12,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32596465] [2021-08-06 14:19:12,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:19:12,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:19:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:19:12,048 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 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) [2021-08-06 14:19:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:12,240 INFO L93 Difference]: Finished difference Result 5230 states and 18222 transitions. [2021-08-06 14:19:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:19:12,241 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 [2021-08-06 14:19:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:12,250 INFO L225 Difference]: With dead ends: 5230 [2021-08-06 14:19:12,250 INFO L226 Difference]: Without dead ends: 5228 [2021-08-06 14:19:12,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:19:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-08-06 14:19:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 4960. [2021-08-06 14:19:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 3.584190360959871) internal successors, (17774), 4959 states have internal predecessors, (17774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 17774 transitions. [2021-08-06 14:19:12,346 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 17774 transitions. Word has length 22 [2021-08-06 14:19:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:12,346 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 17774 transitions. [2021-08-06 14:19:12,346 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) [2021-08-06 14:19:12,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 17774 transitions. [2021-08-06 14:19:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:12,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:12,352 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:12,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 14:19:12,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 14:19:12,554 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:12,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1036735246, now seen corresponding path program 111 times [2021-08-06 14:19:12,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:12,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388596551] [2021-08-06 14:19:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:12,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:12,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:12,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388596551] [2021-08-06 14:19:12,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388596551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:12,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334312940] [2021-08-06 14:19:12,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:19:12,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:12,652 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:12,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 14:19:13,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:19:13,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:13,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:19:13,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:13,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334312940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:13,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:13,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-08-06 14:19:13,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066847473] [2021-08-06 14:19:13,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 14:19:13,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 14:19:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:19:13,790 INFO L87 Difference]: Start difference. First operand 4960 states and 17774 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:15,057 INFO L93 Difference]: Finished difference Result 6422 states and 21501 transitions. [2021-08-06 14:19:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-06 14:19:15,057 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:19:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:15,070 INFO L225 Difference]: With dead ends: 6422 [2021-08-06 14:19:15,070 INFO L226 Difference]: Without dead ends: 6418 [2021-08-06 14:19:15,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2760 ImplicationChecksByTransitivity, 1028.5ms TimeCoverageRelationStatistics Valid=1147, Invalid=7595, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 14:19:15,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6418 states. [2021-08-06 14:19:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6418 to 5505. [2021-08-06 14:19:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 5504 states have (on average 3.484738372093023) internal successors, (19180), 5504 states have internal predecessors, (19180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 19180 transitions. [2021-08-06 14:19:15,182 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 19180 transitions. Word has length 22 [2021-08-06 14:19:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:15,183 INFO L470 AbstractCegarLoop]: Abstraction has 5505 states and 19180 transitions. [2021-08-06 14:19:15,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 19180 transitions. [2021-08-06 14:19:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:15,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:15,188 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:15,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 14:19:15,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 14:19:15,401 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash 738272116, now seen corresponding path program 112 times [2021-08-06 14:19:15,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:15,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4707015] [2021-08-06 14:19:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:15,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:15,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:15,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4707015] [2021-08-06 14:19:15,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4707015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:15,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726938670] [2021-08-06 14:19:15,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:19:15,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:15,497 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:15,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 14:19:16,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:19:16,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:16,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:16,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:16,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726938670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:16,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:16,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:19:16,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140977361] [2021-08-06 14:19:16,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:19:16,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:19:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:19:16,516 INFO L87 Difference]: Start difference. First operand 5505 states and 19180 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) [2021-08-06 14:19:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:16,608 INFO L93 Difference]: Finished difference Result 5965 states and 19849 transitions. [2021-08-06 14:19:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:19:16,609 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 [2021-08-06 14:19:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:16,620 INFO L225 Difference]: With dead ends: 5965 [2021-08-06 14:19:16,620 INFO L226 Difference]: Without dead ends: 5965 [2021-08-06 14:19:16,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2021-08-06 14:19:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 5516. [2021-08-06 14:19:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 3.469628286491387) internal successors, (19135), 5515 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 19135 transitions. [2021-08-06 14:19:16,742 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 19135 transitions. Word has length 22 [2021-08-06 14:19:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:16,742 INFO L470 AbstractCegarLoop]: Abstraction has 5516 states and 19135 transitions. [2021-08-06 14:19:16,742 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) [2021-08-06 14:19:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 19135 transitions. [2021-08-06 14:19:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:16,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:16,747 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:16,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 14:19:16,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:16,948 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:16,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1846081872, now seen corresponding path program 113 times [2021-08-06 14:19:16,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:16,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795319561] [2021-08-06 14:19:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:16,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:17,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:17,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795319561] [2021-08-06 14:19:17,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795319561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:17,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183452459] [2021-08-06 14:19:17,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:19:17,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:17,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:17,045 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:17,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 14:19:17,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:19:17,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:17,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:17,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:18,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183452459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:18,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:18,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:18,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108120156] [2021-08-06 14:19:18,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:18,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:18,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:18,028 INFO L87 Difference]: Start difference. First operand 5516 states and 19135 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:18,171 INFO L93 Difference]: Finished difference Result 6093 states and 20114 transitions. [2021-08-06 14:19:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:19:18,172 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 [2021-08-06 14:19:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:18,182 INFO L225 Difference]: With dead ends: 6093 [2021-08-06 14:19:18,182 INFO L226 Difference]: Without dead ends: 6093 [2021-08-06 14:19:18,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:19:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6093 states. [2021-08-06 14:19:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6093 to 5328. [2021-08-06 14:19:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 5327 states have (on average 3.456354420874789) internal successors, (18412), 5327 states have internal predecessors, (18412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 18412 transitions. [2021-08-06 14:19:18,280 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 18412 transitions. Word has length 22 [2021-08-06 14:19:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:18,281 INFO L470 AbstractCegarLoop]: Abstraction has 5328 states and 18412 transitions. [2021-08-06 14:19:18,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:18,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 18412 transitions. [2021-08-06 14:19:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:18,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:18,286 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:18,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:18,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:18,509 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash -356676876, now seen corresponding path program 114 times [2021-08-06 14:19:18,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:18,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281838717] [2021-08-06 14:19:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:18,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:18,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:18,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281838717] [2021-08-06 14:19:18,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281838717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:18,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965606933] [2021-08-06 14:19:18,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:19:18,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:18,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:18,604 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:18,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 14:19:19,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:19:19,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:19,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:19,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965606933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:19,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:19,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:19,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950917288] [2021-08-06 14:19:19,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:19,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:19,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:19,603 INFO L87 Difference]: Start difference. First operand 5328 states and 18412 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:19,745 INFO L93 Difference]: Finished difference Result 9312 states and 32126 transitions. [2021-08-06 14:19:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:19:19,745 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 [2021-08-06 14:19:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:19,766 INFO L225 Difference]: With dead ends: 9312 [2021-08-06 14:19:19,766 INFO L226 Difference]: Without dead ends: 9312 [2021-08-06 14:19:19,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:19:19,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9312 states. [2021-08-06 14:19:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9312 to 8595. [2021-08-06 14:19:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 3.5828484989527576) internal successors, (30791), 8594 states have internal predecessors, (30791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 30791 transitions. [2021-08-06 14:19:19,959 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 30791 transitions. Word has length 22 [2021-08-06 14:19:19,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:19,959 INFO L470 AbstractCegarLoop]: Abstraction has 8595 states and 30791 transitions. [2021-08-06 14:19:19,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 30791 transitions. [2021-08-06 14:19:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:19,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:19,964 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:19,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:20,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 14:19:20,165 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1429762256, now seen corresponding path program 115 times [2021-08-06 14:19:20,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:20,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519505023] [2021-08-06 14:19:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:20,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:20,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:20,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519505023] [2021-08-06 14:19:20,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519505023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:20,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556839402] [2021-08-06 14:19:20,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:19:20,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:20,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:20,275 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:20,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 14:19:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:21,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:21,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556839402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:21,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:21,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:21,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538876929] [2021-08-06 14:19:21,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:21,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:21,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:21,430 INFO L87 Difference]: Start difference. First operand 8595 states and 30791 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:21,624 INFO L93 Difference]: Finished difference Result 12018 states and 42312 transitions. [2021-08-06 14:19:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:19:21,625 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 [2021-08-06 14:19:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:21,657 INFO L225 Difference]: With dead ends: 12018 [2021-08-06 14:19:21,657 INFO L226 Difference]: Without dead ends: 12018 [2021-08-06 14:19:21,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:19:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12018 states. [2021-08-06 14:19:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12018 to 11262. [2021-08-06 14:19:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11262 states, 11261 states have (on average 3.630583429535565) internal successors, (40884), 11261 states have internal predecessors, (40884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11262 states to 11262 states and 40884 transitions. [2021-08-06 14:19:21,951 INFO L78 Accepts]: Start accepts. Automaton has 11262 states and 40884 transitions. Word has length 22 [2021-08-06 14:19:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:21,952 INFO L470 AbstractCegarLoop]: Abstraction has 11262 states and 40884 transitions. [2021-08-06 14:19:21,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 11262 states and 40884 transitions. [2021-08-06 14:19:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:21,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:21,959 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:21,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:22,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:22,185 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:22,185 INFO L82 PathProgramCache]: Analyzing trace with hash -335670668, now seen corresponding path program 116 times [2021-08-06 14:19:22,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:22,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400851567] [2021-08-06 14:19:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:22,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:22,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:22,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400851567] [2021-08-06 14:19:22,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400851567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:22,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767080117] [2021-08-06 14:19:22,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:19:22,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:22,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:22,304 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:22,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 14:19:23,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:19:23,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:23,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767080117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:23,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:23,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:19:23,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669122754] [2021-08-06 14:19:23,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:23,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:23,541 INFO L87 Difference]: Start difference. First operand 11262 states and 40884 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:23,869 INFO L93 Difference]: Finished difference Result 14897 states and 52797 transitions. [2021-08-06 14:19:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:19:23,869 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 [2021-08-06 14:19:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:23,920 INFO L225 Difference]: With dead ends: 14897 [2021-08-06 14:19:23,920 INFO L226 Difference]: Without dead ends: 14897 [2021-08-06 14:19:23,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:19:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14897 states. [2021-08-06 14:19:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14897 to 13777. [2021-08-06 14:19:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 3.657665505226481) internal successors, (50388), 13776 states have internal predecessors, (50388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 50388 transitions. [2021-08-06 14:19:24,353 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 50388 transitions. Word has length 22 [2021-08-06 14:19:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:24,353 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 50388 transitions. [2021-08-06 14:19:24,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 50388 transitions. [2021-08-06 14:19:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:24,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:24,378 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:24,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:24,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:24,601 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:24,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1325861284, now seen corresponding path program 117 times [2021-08-06 14:19:24,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:24,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182729807] [2021-08-06 14:19:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:24,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:24,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:24,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182729807] [2021-08-06 14:19:24,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182729807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:24,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863630447] [2021-08-06 14:19:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:19:24,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:24,704 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:24,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 14:19:25,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:19:25,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:25,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:25,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863630447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:25,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:25,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:19:25,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817463789] [2021-08-06 14:19:25,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:19:25,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:19:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:19:25,972 INFO L87 Difference]: Start difference. First operand 13777 states and 50388 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) [2021-08-06 14:19:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:26,215 INFO L93 Difference]: Finished difference Result 14797 states and 53395 transitions. [2021-08-06 14:19:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:19:26,215 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 [2021-08-06 14:19:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:26,257 INFO L225 Difference]: With dead ends: 14797 [2021-08-06 14:19:26,257 INFO L226 Difference]: Without dead ends: 14795 [2021-08-06 14:19:26,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:19:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14795 states. [2021-08-06 14:19:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14795 to 14462. [2021-08-06 14:19:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14462 states, 14461 states have (on average 3.6439388700643107) internal successors, (52695), 14461 states have internal predecessors, (52695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14462 states to 14462 states and 52695 transitions. [2021-08-06 14:19:26,635 INFO L78 Accepts]: Start accepts. Automaton has 14462 states and 52695 transitions. Word has length 22 [2021-08-06 14:19:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:26,635 INFO L470 AbstractCegarLoop]: Abstraction has 14462 states and 52695 transitions. [2021-08-06 14:19:26,635 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) [2021-08-06 14:19:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 14462 states and 52695 transitions. [2021-08-06 14:19:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:26,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:26,670 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:26,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:26,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:26,889 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash -531010572, now seen corresponding path program 118 times [2021-08-06 14:19:26,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:26,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684286106] [2021-08-06 14:19:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:26,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:26,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:26,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684286106] [2021-08-06 14:19:26,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684286106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:26,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417574488] [2021-08-06 14:19:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:19:26,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:27,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:27,012 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:27,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 14:19:28,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:19:28,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:28,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417574488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:28,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:28,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:19:28,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147273524] [2021-08-06 14:19:28,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:19:28,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:19:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:19:28,265 INFO L87 Difference]: Start difference. First operand 14462 states and 52695 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) [2021-08-06 14:19:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:28,421 INFO L93 Difference]: Finished difference Result 14786 states and 52723 transitions. [2021-08-06 14:19:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:19:28,421 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 [2021-08-06 14:19:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:28,483 INFO L225 Difference]: With dead ends: 14786 [2021-08-06 14:19:28,483 INFO L226 Difference]: Without dead ends: 14786 [2021-08-06 14:19:28,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14786 states. [2021-08-06 14:19:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14786 to 14158. [2021-08-06 14:19:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14158 states, 14157 states have (on average 3.6305008123189944) internal successors, (51397), 14157 states have internal predecessors, (51397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14158 states to 14158 states and 51397 transitions. [2021-08-06 14:19:28,921 INFO L78 Accepts]: Start accepts. Automaton has 14158 states and 51397 transitions. Word has length 22 [2021-08-06 14:19:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:28,921 INFO L470 AbstractCegarLoop]: Abstraction has 14158 states and 51397 transitions. [2021-08-06 14:19:28,921 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) [2021-08-06 14:19:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14158 states and 51397 transitions. [2021-08-06 14:19:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:28,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:28,929 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:28,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:29,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:29,153 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1179602736, now seen corresponding path program 119 times [2021-08-06 14:19:29,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:29,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091696122] [2021-08-06 14:19:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:29,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:29,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:29,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091696122] [2021-08-06 14:19:29,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091696122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:29,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757579878] [2021-08-06 14:19:29,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:19:29,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:29,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:29,319 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:29,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 14:19:30,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:19:30,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:30,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:30,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757579878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:30,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:30,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:19:30,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387876008] [2021-08-06 14:19:30,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:30,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:30,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:30,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:30,641 INFO L87 Difference]: Start difference. First operand 14158 states and 51397 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:30,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:30,823 INFO L93 Difference]: Finished difference Result 15147 states and 53586 transitions. [2021-08-06 14:19:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:19:30,823 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 [2021-08-06 14:19:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:30,874 INFO L225 Difference]: With dead ends: 15147 [2021-08-06 14:19:30,874 INFO L226 Difference]: Without dead ends: 15147 [2021-08-06 14:19:30,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:19:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15147 states. [2021-08-06 14:19:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15147 to 13944. [2021-08-06 14:19:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13944 states, 13943 states have (on average 3.6136412536756795) internal successors, (50385), 13943 states have internal predecessors, (50385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13944 states to 13944 states and 50385 transitions. [2021-08-06 14:19:31,304 INFO L78 Accepts]: Start accepts. Automaton has 13944 states and 50385 transitions. Word has length 22 [2021-08-06 14:19:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:31,304 INFO L470 AbstractCegarLoop]: Abstraction has 13944 states and 50385 transitions. [2021-08-06 14:19:31,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 13944 states and 50385 transitions. [2021-08-06 14:19:31,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:31,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:31,314 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:31,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:31,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 14:19:31,537 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1625959564, now seen corresponding path program 120 times [2021-08-06 14:19:31,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:31,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556992303] [2021-08-06 14:19:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:31,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:31,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:31,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556992303] [2021-08-06 14:19:31,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556992303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:31,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761616960] [2021-08-06 14:19:31,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:19:31,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:31,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:31,650 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:31,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 14:19:32,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:19:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:32,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:32,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:32,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761616960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:32,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:32,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:19:32,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550820081] [2021-08-06 14:19:32,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:32,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:32,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:32,917 INFO L87 Difference]: Start difference. First operand 13944 states and 50385 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:33,167 INFO L93 Difference]: Finished difference Result 24461 states and 88972 transitions. [2021-08-06 14:19:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:19:33,168 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 [2021-08-06 14:19:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:33,262 INFO L225 Difference]: With dead ends: 24461 [2021-08-06 14:19:33,262 INFO L226 Difference]: Without dead ends: 24461 [2021-08-06 14:19:33,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:19:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24461 states. [2021-08-06 14:19:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24461 to 23801. [2021-08-06 14:19:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23801 states, 23800 states have (on average 3.685378151260504) internal successors, (87712), 23800 states have internal predecessors, (87712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23801 states to 23801 states and 87712 transitions. [2021-08-06 14:19:34,060 INFO L78 Accepts]: Start accepts. Automaton has 23801 states and 87712 transitions. Word has length 22 [2021-08-06 14:19:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:34,060 INFO L470 AbstractCegarLoop]: Abstraction has 23801 states and 87712 transitions. [2021-08-06 14:19:34,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 23801 states and 87712 transitions. [2021-08-06 14:19:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:34,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:34,069 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:34,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:34,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 14:19:34,289 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:34,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1595922352, now seen corresponding path program 121 times [2021-08-06 14:19:34,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:34,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664507995] [2021-08-06 14:19:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:34,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:34,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:34,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664507995] [2021-08-06 14:19:34,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664507995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:34,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565224810] [2021-08-06 14:19:34,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:19:34,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:34,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:34,407 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:34,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 14:19:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:35,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:35,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:35,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565224810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:35,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:35,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:19:35,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969914022] [2021-08-06 14:19:35,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:35,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:35,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:35,777 INFO L87 Difference]: Start difference. First operand 23801 states and 87712 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:36,091 INFO L93 Difference]: Finished difference Result 29931 states and 109808 transitions. [2021-08-06 14:19:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:19:36,092 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 [2021-08-06 14:19:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:36,216 INFO L225 Difference]: With dead ends: 29931 [2021-08-06 14:19:36,216 INFO L226 Difference]: Without dead ends: 29931 [2021-08-06 14:19:36,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:19:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29931 states. [2021-08-06 14:19:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29931 to 29420. [2021-08-06 14:19:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29420 states, 29419 states have (on average 3.704578673646283) internal successors, (108985), 29419 states have internal predecessors, (108985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29420 states to 29420 states and 108985 transitions. [2021-08-06 14:19:37,487 INFO L78 Accepts]: Start accepts. Automaton has 29420 states and 108985 transitions. Word has length 22 [2021-08-06 14:19:37,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:37,487 INFO L470 AbstractCegarLoop]: Abstraction has 29420 states and 108985 transitions. [2021-08-06 14:19:37,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 29420 states and 108985 transitions. [2021-08-06 14:19:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:37,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:37,497 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:37,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:37,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:37,725 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1604953356, now seen corresponding path program 122 times [2021-08-06 14:19:37,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:37,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990760967] [2021-08-06 14:19:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:37,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:38,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:38,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990760967] [2021-08-06 14:19:38,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990760967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:38,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951556983] [2021-08-06 14:19:38,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:19:38,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:38,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:38,125 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:38,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 14:19:39,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:19:39,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:39,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:39,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:39,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951556983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:39,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:39,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:19:39,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407372405] [2021-08-06 14:19:39,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:39,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:39,415 INFO L87 Difference]: Start difference. First operand 29420 states and 108985 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:39,863 INFO L93 Difference]: Finished difference Result 32137 states and 117885 transitions. [2021-08-06 14:19:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:19:39,863 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 [2021-08-06 14:19:39,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:40,013 INFO L225 Difference]: With dead ends: 32137 [2021-08-06 14:19:40,013 INFO L226 Difference]: Without dead ends: 32137 [2021-08-06 14:19:40,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:19:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32137 states. [2021-08-06 14:19:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32137 to 31599. [2021-08-06 14:19:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31599 states, 31598 states have (on average 3.7039053104626873) internal successors, (117036), 31598 states have internal predecessors, (117036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31599 states to 31599 states and 117036 transitions. [2021-08-06 14:19:41,226 INFO L78 Accepts]: Start accepts. Automaton has 31599 states and 117036 transitions. Word has length 22 [2021-08-06 14:19:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:41,226 INFO L470 AbstractCegarLoop]: Abstraction has 31599 states and 117036 transitions. [2021-08-06 14:19:41,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:41,226 INFO L276 IsEmpty]: Start isEmpty. Operand 31599 states and 117036 transitions. [2021-08-06 14:19:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:41,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:41,234 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:41,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:41,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 14:19:41,436 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:41,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2047852496, now seen corresponding path program 123 times [2021-08-06 14:19:41,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:41,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445448060] [2021-08-06 14:19:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:41,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:41,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:41,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445448060] [2021-08-06 14:19:41,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445448060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:41,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950825560] [2021-08-06 14:19:41,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:19:41,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:41,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:41,782 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:41,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 14:19:42,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:19:42,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:42,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:43,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950825560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:43,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:43,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:19:43,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691665749] [2021-08-06 14:19:43,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:19:43,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:43,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:19:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:43,009 INFO L87 Difference]: Start difference. First operand 31599 states and 117036 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:43,534 INFO L93 Difference]: Finished difference Result 33773 states and 123595 transitions. [2021-08-06 14:19:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:19:43,534 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 [2021-08-06 14:19:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:43,776 INFO L225 Difference]: With dead ends: 33773 [2021-08-06 14:19:43,776 INFO L226 Difference]: Without dead ends: 33773 [2021-08-06 14:19:43,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:19:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33773 states. [2021-08-06 14:19:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33773 to 32987. [2021-08-06 14:19:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32987 states, 32986 states have (on average 3.7019341538834656) internal successors, (122112), 32986 states have internal predecessors, (122112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32987 states to 32987 states and 122112 transitions. [2021-08-06 14:19:44,692 INFO L78 Accepts]: Start accepts. Automaton has 32987 states and 122112 transitions. Word has length 22 [2021-08-06 14:19:44,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:44,692 INFO L470 AbstractCegarLoop]: Abstraction has 32987 states and 122112 transitions. [2021-08-06 14:19:44,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 32987 states and 122112 transitions. [2021-08-06 14:19:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:44,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:44,700 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:44,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 14:19:44,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 14:19:44,903 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:44,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1731940364, now seen corresponding path program 124 times [2021-08-06 14:19:44,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:44,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114145596] [2021-08-06 14:19:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:44,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:19:45,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:45,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114145596] [2021-08-06 14:19:45,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114145596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:45,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515642663] [2021-08-06 14:19:45,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:19:45,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:45,405 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:45,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 14:19:46,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:19:46,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:46,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:46,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:19:46,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515642663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:46,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:46,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:19:46,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209746234] [2021-08-06 14:19:46,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:19:46,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:19:46,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:19:46,915 INFO L87 Difference]: Start difference. First operand 32987 states and 122112 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:47,436 INFO L93 Difference]: Finished difference Result 37724 states and 139194 transitions. [2021-08-06 14:19:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:19:47,437 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 22 [2021-08-06 14:19:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:47,599 INFO L225 Difference]: With dead ends: 37724 [2021-08-06 14:19:47,600 INFO L226 Difference]: Without dead ends: 37720 [2021-08-06 14:19:47,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:19:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37720 states. [2021-08-06 14:19:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37720 to 37452. [2021-08-06 14:19:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37452 states, 37451 states have (on average 3.707671357240127) internal successors, (138856), 37451 states have internal predecessors, (138856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37452 states to 37452 states and 138856 transitions. [2021-08-06 14:19:49,239 INFO L78 Accepts]: Start accepts. Automaton has 37452 states and 138856 transitions. Word has length 22 [2021-08-06 14:19:49,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:49,240 INFO L470 AbstractCegarLoop]: Abstraction has 37452 states and 138856 transitions. [2021-08-06 14:19:49,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 37452 states and 138856 transitions. [2021-08-06 14:19:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:49,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:49,249 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:49,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 14:19:49,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 14:19:49,454 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:49,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1700926988, now seen corresponding path program 125 times [2021-08-06 14:19:49,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:49,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384498127] [2021-08-06 14:19:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:49,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:19:49,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:49,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384498127] [2021-08-06 14:19:49,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384498127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:49,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374101376] [2021-08-06 14:19:49,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:19:49,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:49,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:49,633 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:49,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 14:19:51,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:19:51,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:51,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:19:51,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374101376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:51,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:51,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 14:19:51,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742559380] [2021-08-06 14:19:51,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:19:51,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:19:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:19:51,294 INFO L87 Difference]: Start difference. First operand 37452 states and 138856 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:51,822 INFO L93 Difference]: Finished difference Result 39652 states and 145615 transitions. [2021-08-06 14:19:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:19:51,822 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 22 [2021-08-06 14:19:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:51,991 INFO L225 Difference]: With dead ends: 39652 [2021-08-06 14:19:51,991 INFO L226 Difference]: Without dead ends: 39652 [2021-08-06 14:19:51,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:19:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39652 states. [2021-08-06 14:19:53,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39652 to 38970. [2021-08-06 14:19:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38970 states, 38969 states have (on average 3.7050476019400036) internal successors, (144382), 38969 states have internal predecessors, (144382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38970 states to 38970 states and 144382 transitions. [2021-08-06 14:19:53,606 INFO L78 Accepts]: Start accepts. Automaton has 38970 states and 144382 transitions. Word has length 22 [2021-08-06 14:19:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:53,606 INFO L470 AbstractCegarLoop]: Abstraction has 38970 states and 144382 transitions. [2021-08-06 14:19:53,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 38970 states and 144382 transitions. [2021-08-06 14:19:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:53,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:53,619 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:53,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:53,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 14:19:53,836 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:53,837 INFO L82 PathProgramCache]: Analyzing trace with hash -606835400, now seen corresponding path program 126 times [2021-08-06 14:19:53,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:53,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573931616] [2021-08-06 14:19:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:53,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:53,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:53,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573931616] [2021-08-06 14:19:53,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573931616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:53,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880723846] [2021-08-06 14:19:53,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:19:53,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:53,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:53,938 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:53,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 14:19:55,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:19:55,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:55,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:19:55,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880723846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:55,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:55,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 14:19:55,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766850140] [2021-08-06 14:19:55,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:19:55,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:19:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:19:55,240 INFO L87 Difference]: Start difference. First operand 38970 states and 144382 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:55,737 INFO L93 Difference]: Finished difference Result 48804 states and 179378 transitions. [2021-08-06 14:19:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:19:55,738 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 [2021-08-06 14:19:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:55,900 INFO L225 Difference]: With dead ends: 48804 [2021-08-06 14:19:55,900 INFO L226 Difference]: Without dead ends: 48804 [2021-08-06 14:19:55,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:19:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48804 states. [2021-08-06 14:19:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48804 to 47244. [2021-08-06 14:19:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47244 states, 47243 states have (on average 3.7153864064517497) internal successors, (175526), 47243 states have internal predecessors, (175526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47244 states to 47244 states and 175526 transitions. [2021-08-06 14:19:57,542 INFO L78 Accepts]: Start accepts. Automaton has 47244 states and 175526 transitions. Word has length 22 [2021-08-06 14:19:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:57,542 INFO L470 AbstractCegarLoop]: Abstraction has 47244 states and 175526 transitions. [2021-08-06 14:19:57,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 47244 states and 175526 transitions. [2021-08-06 14:19:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:19:57,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:57,556 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:57,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:57,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:57,757 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:57,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1679920780, now seen corresponding path program 127 times [2021-08-06 14:19:57,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:57,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267086703] [2021-08-06 14:19:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:57,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:57,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:57,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267086703] [2021-08-06 14:19:57,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267086703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:57,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166620904] [2021-08-06 14:19:57,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:19:57,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:57,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:57,847 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:57,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 14:19:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:19:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:19:59,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166620904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:59,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:59,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 14:19:59,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543789462] [2021-08-06 14:19:59,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:19:59,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:59,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:19:59,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:19:59,071 INFO L87 Difference]: Start difference. First operand 47244 states and 175526 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:59,666 INFO L93 Difference]: Finished difference Result 50459 states and 186193 transitions. [2021-08-06 14:19:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:19:59,675 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 [2021-08-06 14:19:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:59,863 INFO L225 Difference]: With dead ends: 50459 [2021-08-06 14:19:59,864 INFO L226 Difference]: Without dead ends: 50459 [2021-08-06 14:19:59,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:19:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50459 states. [2021-08-06 14:20:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50459 to 49796. [2021-08-06 14:20:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49796 states, 49795 states have (on average 3.7161361582488204) internal successors, (185045), 49795 states have internal predecessors, (185045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49796 states to 49796 states and 185045 transitions. [2021-08-06 14:20:01,422 INFO L78 Accepts]: Start accepts. Automaton has 49796 states and 185045 transitions. Word has length 22 [2021-08-06 14:20:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:01,422 INFO L470 AbstractCegarLoop]: Abstraction has 49796 states and 185045 transitions. [2021-08-06 14:20:01,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 49796 states and 185045 transitions. [2021-08-06 14:20:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:01,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:01,432 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:01,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:01,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:01,633 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:01,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:01,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1049734540, now seen corresponding path program 128 times [2021-08-06 14:20:01,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:01,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64069633] [2021-08-06 14:20:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:01,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:01,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:01,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64069633] [2021-08-06 14:20:01,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64069633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:01,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975794577] [2021-08-06 14:20:01,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:20:01,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:01,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:01,995 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:01,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 14:20:03,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:20:03,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:03,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:20:03,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975794577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:03,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:03,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:20:03,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214154043] [2021-08-06 14:20:03,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:20:03,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:20:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:20:03,209 INFO L87 Difference]: Start difference. First operand 49796 states and 185045 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) [2021-08-06 14:20:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:03,668 INFO L93 Difference]: Finished difference Result 56416 states and 206887 transitions. [2021-08-06 14:20:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:20:03,669 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 [2021-08-06 14:20:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:03,899 INFO L225 Difference]: With dead ends: 56416 [2021-08-06 14:20:03,899 INFO L226 Difference]: Without dead ends: 56416 [2021-08-06 14:20:03,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:20:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56416 states. [2021-08-06 14:20:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56416 to 46910. [2021-08-06 14:20:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46910 states, 46909 states have (on average 3.703297874608284) internal successors, (173718), 46909 states have internal predecessors, (173718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46910 states to 46910 states and 173718 transitions. [2021-08-06 14:20:05,714 INFO L78 Accepts]: Start accepts. Automaton has 46910 states and 173718 transitions. Word has length 22 [2021-08-06 14:20:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:05,715 INFO L470 AbstractCegarLoop]: Abstraction has 46910 states and 173718 transitions. [2021-08-06 14:20:05,715 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) [2021-08-06 14:20:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 46910 states and 173718 transitions. [2021-08-06 14:20:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:05,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:05,725 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:05,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 14:20:05,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-06 14:20:05,925 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2122819920, now seen corresponding path program 129 times [2021-08-06 14:20:05,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:05,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337338336] [2021-08-06 14:20:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:05,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:06,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:06,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337338336] [2021-08-06 14:20:06,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337338336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:06,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238464735] [2021-08-06 14:20:06,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:20:06,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:06,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:06,042 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:06,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 14:20:07,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:20:07,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:20:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238464735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:07,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:07,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:20:07,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360239445] [2021-08-06 14:20:07,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:20:07,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:20:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:20:07,432 INFO L87 Difference]: Start difference. First operand 46910 states and 173718 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) [2021-08-06 14:20:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:08,052 INFO L93 Difference]: Finished difference Result 54126 states and 199337 transitions. [2021-08-06 14:20:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:20:08,053 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 [2021-08-06 14:20:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:08,304 INFO L225 Difference]: With dead ends: 54126 [2021-08-06 14:20:08,304 INFO L226 Difference]: Without dead ends: 54126 [2021-08-06 14:20:08,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:20:08,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54126 states. [2021-08-06 14:20:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54126 to 50918. [2021-08-06 14:20:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50918 states, 50917 states have (on average 3.7099397057957066) internal successors, (188899), 50917 states have internal predecessors, (188899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50918 states to 50918 states and 188899 transitions. [2021-08-06 14:20:10,313 INFO L78 Accepts]: Start accepts. Automaton has 50918 states and 188899 transitions. Word has length 22 [2021-08-06 14:20:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:10,313 INFO L470 AbstractCegarLoop]: Abstraction has 50918 states and 188899 transitions. [2021-08-06 14:20:10,313 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) [2021-08-06 14:20:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 50918 states and 188899 transitions. [2021-08-06 14:20:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:10,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:10,325 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:10,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:10,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:10,526 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:10,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:10,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1028728332, now seen corresponding path program 130 times [2021-08-06 14:20:10,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:10,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957418065] [2021-08-06 14:20:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:10,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:10,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:10,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957418065] [2021-08-06 14:20:10,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957418065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:10,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583020238] [2021-08-06 14:20:10,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:20:10,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:10,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:10,642 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:10,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 14:20:11,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:20:11,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:11,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:20:11,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583020238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:11,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:11,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:20:11,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933675669] [2021-08-06 14:20:11,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:20:11,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:11,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:20:11,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:20:11,979 INFO L87 Difference]: Start difference. First operand 50918 states and 188899 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) [2021-08-06 14:20:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:12,516 INFO L93 Difference]: Finished difference Result 52755 states and 194320 transitions. [2021-08-06 14:20:12,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:20:12,517 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 [2021-08-06 14:20:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:12,895 INFO L225 Difference]: With dead ends: 52755 [2021-08-06 14:20:12,896 INFO L226 Difference]: Without dead ends: 52755 [2021-08-06 14:20:12,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:20:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52755 states. [2021-08-06 14:20:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52755 to 52056. [2021-08-06 14:20:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52056 states, 52055 states have (on average 3.710364038036692) internal successors, (193143), 52055 states have internal predecessors, (193143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52056 states to 52056 states and 193143 transitions. [2021-08-06 14:20:14,509 INFO L78 Accepts]: Start accepts. Automaton has 52056 states and 193143 transitions. Word has length 22 [2021-08-06 14:20:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:14,510 INFO L470 AbstractCegarLoop]: Abstraction has 52056 states and 193143 transitions. [2021-08-06 14:20:14,510 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) [2021-08-06 14:20:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 52056 states and 193143 transitions. [2021-08-06 14:20:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:14,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:14,523 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:14,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:14,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:14,724 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:14,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1894705992, now seen corresponding path program 131 times [2021-08-06 14:20:14,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:14,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646501206] [2021-08-06 14:20:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:14,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:14,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:14,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646501206] [2021-08-06 14:20:14,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646501206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:14,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599895] [2021-08-06 14:20:14,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:20:14,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:14,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:14,828 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:14,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 14:20:16,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:20:16,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:16,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:16,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:16,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:16,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:20:16,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090374675] [2021-08-06 14:20:16,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:20:16,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:16,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:20:16,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:20:16,278 INFO L87 Difference]: Start difference. First operand 52056 states and 193143 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:16,828 INFO L93 Difference]: Finished difference Result 55237 states and 201943 transitions. [2021-08-06 14:20:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:20:16,829 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 [2021-08-06 14:20:16,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:17,037 INFO L225 Difference]: With dead ends: 55237 [2021-08-06 14:20:17,037 INFO L226 Difference]: Without dead ends: 55237 [2021-08-06 14:20:17,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:20:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55237 states. [2021-08-06 14:20:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55237 to 20600. [2021-08-06 14:20:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20600 states, 20599 states have (on average 3.5929899509684935) internal successors, (74012), 20599 states have internal predecessors, (74012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20600 states to 20600 states and 74012 transitions. [2021-08-06 14:20:18,267 INFO L78 Accepts]: Start accepts. Automaton has 20600 states and 74012 transitions. Word has length 22 [2021-08-06 14:20:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:18,267 INFO L470 AbstractCegarLoop]: Abstraction has 20600 states and 74012 transitions. [2021-08-06 14:20:18,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 20600 states and 74012 transitions. [2021-08-06 14:20:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:18,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:18,275 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:18,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-06 14:20:18,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 14:20:18,476 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:18,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:18,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1327175924, now seen corresponding path program 132 times [2021-08-06 14:20:18,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:18,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142599612] [2021-08-06 14:20:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:18,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:18,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:18,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142599612] [2021-08-06 14:20:18,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142599612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:18,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82718676] [2021-08-06 14:20:18,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:20:18,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:18,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:18,582 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:18,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 14:20:19,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:20:19,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:19,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:19,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82718676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:19,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:19,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:20:19,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362646825] [2021-08-06 14:20:19,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:20:19,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:20:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:20:19,849 INFO L87 Difference]: Start difference. First operand 20600 states and 74012 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:20,119 INFO L93 Difference]: Finished difference Result 29132 states and 104215 transitions. [2021-08-06 14:20:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:20:20,120 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 [2021-08-06 14:20:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:20,204 INFO L225 Difference]: With dead ends: 29132 [2021-08-06 14:20:20,204 INFO L226 Difference]: Without dead ends: 29132 [2021-08-06 14:20:20,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:20:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29132 states. [2021-08-06 14:20:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29132 to 20371. [2021-08-06 14:20:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20371 states, 20370 states have (on average 3.595434462444772) internal successors, (73239), 20370 states have internal predecessors, (73239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20371 states to 20371 states and 73239 transitions. [2021-08-06 14:20:20,820 INFO L78 Accepts]: Start accepts. Automaton has 20371 states and 73239 transitions. Word has length 22 [2021-08-06 14:20:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:20,820 INFO L470 AbstractCegarLoop]: Abstraction has 20371 states and 73239 transitions. [2021-08-06 14:20:20,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 20371 states and 73239 transitions. [2021-08-06 14:20:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:20,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:20,828 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:20,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:21,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 14:20:21,028 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1873699784, now seen corresponding path program 133 times [2021-08-06 14:20:21,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:21,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656931656] [2021-08-06 14:20:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:21,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:21,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:21,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656931656] [2021-08-06 14:20:21,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656931656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:21,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497394319] [2021-08-06 14:20:21,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:20:21,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:21,145 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:21,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 14:20:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:22,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:22,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:22,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497394319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:22,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:22,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:20:22,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217630402] [2021-08-06 14:20:22,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:20:22,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:22,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:20:22,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:20:22,397 INFO L87 Difference]: Start difference. First operand 20371 states and 73239 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:22,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:22,745 INFO L93 Difference]: Finished difference Result 22358 states and 79249 transitions. [2021-08-06 14:20:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:20:22,746 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 [2021-08-06 14:20:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:22,810 INFO L225 Difference]: With dead ends: 22358 [2021-08-06 14:20:22,810 INFO L226 Difference]: Without dead ends: 22358 [2021-08-06 14:20:22,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:20:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22358 states. [2021-08-06 14:20:23,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22358 to 20431. [2021-08-06 14:20:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20431 states, 20430 states have (on average 3.599216837983358) internal successors, (73532), 20430 states have internal predecessors, (73532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20431 states to 20431 states and 73532 transitions. [2021-08-06 14:20:23,301 INFO L78 Accepts]: Start accepts. Automaton has 20431 states and 73532 transitions. Word has length 22 [2021-08-06 14:20:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:23,301 INFO L470 AbstractCegarLoop]: Abstraction has 20431 states and 73532 transitions. [2021-08-06 14:20:23,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 20431 states and 73532 transitions. [2021-08-06 14:20:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:23,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:23,309 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:23,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 14:20:23,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 14:20:23,510 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:23,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1978368372, now seen corresponding path program 134 times [2021-08-06 14:20:23,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:23,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140642023] [2021-08-06 14:20:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:23,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:23,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:23,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140642023] [2021-08-06 14:20:23,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140642023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:23,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516086619] [2021-08-06 14:20:23,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:20:23,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:23,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:23,748 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:23,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 14:20:24,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:20:24,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:24,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:24,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:25,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516086619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:25,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:25,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:20:25,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14546916] [2021-08-06 14:20:25,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:20:25,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:20:25,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:20:25,191 INFO L87 Difference]: Start difference. First operand 20431 states and 73532 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:25,673 INFO L93 Difference]: Finished difference Result 21558 states and 76202 transitions. [2021-08-06 14:20:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:20:25,673 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 [2021-08-06 14:20:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:25,755 INFO L225 Difference]: With dead ends: 21558 [2021-08-06 14:20:25,755 INFO L226 Difference]: Without dead ends: 21558 [2021-08-06 14:20:25,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:20:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21558 states. [2021-08-06 14:20:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21558 to 20275. [2021-08-06 14:20:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20275 states, 20274 states have (on average 3.600473512873631) internal successors, (72996), 20274 states have internal predecessors, (72996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20275 states to 20275 states and 72996 transitions. [2021-08-06 14:20:26,512 INFO L78 Accepts]: Start accepts. Automaton has 20275 states and 72996 transitions. Word has length 22 [2021-08-06 14:20:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:26,513 INFO L470 AbstractCegarLoop]: Abstraction has 20275 states and 72996 transitions. [2021-08-06 14:20:26,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:26,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20275 states and 72996 transitions. [2021-08-06 14:20:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:26,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:26,521 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:26,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:26,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:26,740 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash 632803620, now seen corresponding path program 135 times [2021-08-06 14:20:26,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:26,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573250311] [2021-08-06 14:20:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:26,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:26,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:26,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573250311] [2021-08-06 14:20:26,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573250311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:26,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708159340] [2021-08-06 14:20:26,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:20:26,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:26,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:26,856 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:26,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 14:20:28,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:20:28,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:28,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:28,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:20:28,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708159340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:28,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:28,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:20:28,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562657784] [2021-08-06 14:20:28,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:20:28,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:28,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:20:28,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:20:28,231 INFO L87 Difference]: Start difference. First operand 20275 states and 72996 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) [2021-08-06 14:20:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:28,547 INFO L93 Difference]: Finished difference Result 20612 states and 73456 transitions. [2021-08-06 14:20:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:20:28,547 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 [2021-08-06 14:20:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:28,633 INFO L225 Difference]: With dead ends: 20612 [2021-08-06 14:20:28,633 INFO L226 Difference]: Without dead ends: 20608 [2021-08-06 14:20:28,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:20:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20608 states. [2021-08-06 14:20:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20608 to 18758. [2021-08-06 14:20:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18758 states, 18757 states have (on average 3.5879405022125073) internal successors, (67299), 18757 states have internal predecessors, (67299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18758 states to 18758 states and 67299 transitions. [2021-08-06 14:20:29,424 INFO L78 Accepts]: Start accepts. Automaton has 18758 states and 67299 transitions. Word has length 22 [2021-08-06 14:20:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:29,424 INFO L470 AbstractCegarLoop]: Abstraction has 18758 states and 67299 transitions. [2021-08-06 14:20:29,424 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) [2021-08-06 14:20:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 18758 states and 67299 transitions. [2021-08-06 14:20:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:29,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:29,434 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:29,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:29,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 14:20:29,638 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1224068236, now seen corresponding path program 136 times [2021-08-06 14:20:29,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:29,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451455369] [2021-08-06 14:20:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:29,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:29,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:29,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451455369] [2021-08-06 14:20:29,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451455369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:29,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145494602] [2021-08-06 14:20:29,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:20:29,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:29,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:29,751 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:29,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 14:20:31,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:20:31,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:31,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:31,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145494602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:31,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:31,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:20:31,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818540857] [2021-08-06 14:20:31,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:20:31,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:31,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:20:31,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:20:31,193 INFO L87 Difference]: Start difference. First operand 18758 states and 67299 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) [2021-08-06 14:20:31,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:31,483 INFO L93 Difference]: Finished difference Result 19253 states and 67905 transitions. [2021-08-06 14:20:31,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:20:31,484 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 [2021-08-06 14:20:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:31,555 INFO L225 Difference]: With dead ends: 19253 [2021-08-06 14:20:31,555 INFO L226 Difference]: Without dead ends: 19253 [2021-08-06 14:20:31,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:20:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-08-06 14:20:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 18728. [2021-08-06 14:20:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18728 states, 18727 states have (on average 3.5730763069365086) internal successors, (66913), 18727 states have internal predecessors, (66913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18728 states to 18728 states and 66913 transitions. [2021-08-06 14:20:32,101 INFO L78 Accepts]: Start accepts. Automaton has 18728 states and 66913 transitions. Word has length 22 [2021-08-06 14:20:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:32,101 INFO L470 AbstractCegarLoop]: Abstraction has 18728 states and 66913 transitions. [2021-08-06 14:20:32,101 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) [2021-08-06 14:20:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 18728 states and 66913 transitions. [2021-08-06 14:20:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:32,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:32,111 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:32,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:32,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 14:20:32,335 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:32,335 INFO L82 PathProgramCache]: Analyzing trace with hash 486545072, now seen corresponding path program 137 times [2021-08-06 14:20:32,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:32,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174989609] [2021-08-06 14:20:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:32,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:20:32,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:32,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174989609] [2021-08-06 14:20:32,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174989609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:32,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665171630] [2021-08-06 14:20:32,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:20:32,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:32,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:32,666 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:32,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 14:20:33,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:20:33,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:33,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:33,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:20:34,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665171630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:34,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:34,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:20:34,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492724864] [2021-08-06 14:20:34,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:20:34,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:20:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:20:34,033 INFO L87 Difference]: Start difference. First operand 18728 states and 66913 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:34,196 INFO L93 Difference]: Finished difference Result 19033 states and 66955 transitions. [2021-08-06 14:20:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:20:34,196 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 [2021-08-06 14:20:34,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:34,249 INFO L225 Difference]: With dead ends: 19033 [2021-08-06 14:20:34,249 INFO L226 Difference]: Without dead ends: 19033 [2021-08-06 14:20:34,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:20:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19033 states. [2021-08-06 14:20:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19033 to 18118. [2021-08-06 14:20:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18118 states, 18117 states have (on average 3.5738808853562953) internal successors, (64748), 18117 states have internal predecessors, (64748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18118 states to 18118 states and 64748 transitions. [2021-08-06 14:20:34,843 INFO L78 Accepts]: Start accepts. Automaton has 18118 states and 64748 transitions. Word has length 22 [2021-08-06 14:20:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:34,843 INFO L470 AbstractCegarLoop]: Abstraction has 18118 states and 64748 transitions. [2021-08-06 14:20:34,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 18118 states and 64748 transitions. [2021-08-06 14:20:34,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:34,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:34,850 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:34,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:35,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:35,057 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1975950068, now seen corresponding path program 138 times [2021-08-06 14:20:35,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:35,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766305] [2021-08-06 14:20:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:35,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:35,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:35,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766305] [2021-08-06 14:20:35,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:35,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733588796] [2021-08-06 14:20:35,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:20:35,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:35,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:35,158 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:35,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 14:20:36,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:20:36,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:36,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:36,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:36,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733588796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:36,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:36,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:20:36,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953780144] [2021-08-06 14:20:36,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:20:36,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:36,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:20:36,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:20:36,468 INFO L87 Difference]: Start difference. First operand 18118 states and 64748 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) [2021-08-06 14:20:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:36,657 INFO L93 Difference]: Finished difference Result 19213 states and 67361 transitions. [2021-08-06 14:20:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:20:36,658 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 [2021-08-06 14:20:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:36,707 INFO L225 Difference]: With dead ends: 19213 [2021-08-06 14:20:36,708 INFO L226 Difference]: Without dead ends: 19213 [2021-08-06 14:20:36,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:20:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19213 states. [2021-08-06 14:20:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19213 to 18166. [2021-08-06 14:20:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18166 states, 18165 states have (on average 3.565923479218277) internal successors, (64775), 18165 states have internal predecessors, (64775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18166 states to 18166 states and 64775 transitions. [2021-08-06 14:20:37,183 INFO L78 Accepts]: Start accepts. Automaton has 18166 states and 64775 transitions. Word has length 22 [2021-08-06 14:20:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:37,183 INFO L470 AbstractCegarLoop]: Abstraction has 18166 states and 64775 transitions. [2021-08-06 14:20:37,183 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) [2021-08-06 14:20:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 18166 states and 64775 transitions. [2021-08-06 14:20:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:37,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:37,190 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:37,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-06 14:20:37,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:37,390 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash 902864688, now seen corresponding path program 139 times [2021-08-06 14:20:37,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:37,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325465841] [2021-08-06 14:20:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:37,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:37,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:37,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325465841] [2021-08-06 14:20:37,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325465841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:37,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293210024] [2021-08-06 14:20:37,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:20:37,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:37,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:37,498 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:37,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 14:20:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:38,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:38,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293210024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:38,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:38,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:20:38,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748856868] [2021-08-06 14:20:38,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:20:38,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:20:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:20:38,784 INFO L87 Difference]: Start difference. First operand 18166 states and 64775 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) [2021-08-06 14:20:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:39,013 INFO L93 Difference]: Finished difference Result 24240 states and 85821 transitions. [2021-08-06 14:20:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:20:39,013 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 [2021-08-06 14:20:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:39,097 INFO L225 Difference]: With dead ends: 24240 [2021-08-06 14:20:39,098 INFO L226 Difference]: Without dead ends: 24240 [2021-08-06 14:20:39,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:20:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24240 states. [2021-08-06 14:20:39,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24240 to 19393. [2021-08-06 14:20:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19393 states, 19392 states have (on average 3.5691006600660065) internal successors, (69212), 19392 states have internal predecessors, (69212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19393 states to 19393 states and 69212 transitions. [2021-08-06 14:20:39,706 INFO L78 Accepts]: Start accepts. Automaton has 19393 states and 69212 transitions. Word has length 22 [2021-08-06 14:20:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:39,707 INFO L470 AbstractCegarLoop]: Abstraction has 19393 states and 69212 transitions. [2021-08-06 14:20:39,707 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) [2021-08-06 14:20:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 19393 states and 69212 transitions. [2021-08-06 14:20:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:39,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:39,714 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:39,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:39,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:39,915 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1996956276, now seen corresponding path program 140 times [2021-08-06 14:20:39,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:39,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905250366] [2021-08-06 14:20:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:39,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:40,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:40,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905250366] [2021-08-06 14:20:40,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905250366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:40,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364063399] [2021-08-06 14:20:40,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:20:40,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:40,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:40,039 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:40,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 14:20:41,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:20:41,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:41,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:41,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364063399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:41,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:41,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:20:41,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476487929] [2021-08-06 14:20:41,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:20:41,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:20:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:20:41,515 INFO L87 Difference]: Start difference. First operand 19393 states and 69212 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) [2021-08-06 14:20:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:41,768 INFO L93 Difference]: Finished difference Result 21468 states and 75693 transitions. [2021-08-06 14:20:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:20:41,769 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 [2021-08-06 14:20:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:41,834 INFO L225 Difference]: With dead ends: 21468 [2021-08-06 14:20:41,834 INFO L226 Difference]: Without dead ends: 21468 [2021-08-06 14:20:41,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:20:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21468 states. [2021-08-06 14:20:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21468 to 20238. [2021-08-06 14:20:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20238 states, 20237 states have (on average 3.5724168602065522) internal successors, (72295), 20237 states have internal predecessors, (72295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20238 states to 20238 states and 72295 transitions. [2021-08-06 14:20:42,516 INFO L78 Accepts]: Start accepts. Automaton has 20238 states and 72295 transitions. Word has length 22 [2021-08-06 14:20:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:42,516 INFO L470 AbstractCegarLoop]: Abstraction has 20238 states and 72295 transitions. [2021-08-06 14:20:42,517 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) [2021-08-06 14:20:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 20238 states and 72295 transitions. [2021-08-06 14:20:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:42,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:42,523 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:42,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-06 14:20:42,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:42,724 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:42,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1554057136, now seen corresponding path program 141 times [2021-08-06 14:20:42,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:42,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809828091] [2021-08-06 14:20:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:42,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:42,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:42,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809828091] [2021-08-06 14:20:42,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809828091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:42,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530988404] [2021-08-06 14:20:42,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:20:42,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:42,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:42,850 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:42,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 14:20:44,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:20:44,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:44,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:44,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530988404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:44,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:44,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:20:44,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723727776] [2021-08-06 14:20:44,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:20:44,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:44,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:20:44,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:20:44,172 INFO L87 Difference]: Start difference. First operand 20238 states and 72295 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) [2021-08-06 14:20:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:44,542 INFO L93 Difference]: Finished difference Result 21341 states and 75134 transitions. [2021-08-06 14:20:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:20:44,543 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 [2021-08-06 14:20:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:44,593 INFO L225 Difference]: With dead ends: 21341 [2021-08-06 14:20:44,593 INFO L226 Difference]: Without dead ends: 21341 [2021-08-06 14:20:44,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:20:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21341 states. [2021-08-06 14:20:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21341 to 20408. [2021-08-06 14:20:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20408 states, 20407 states have (on average 3.5723526240995738) internal successors, (72901), 20407 states have internal predecessors, (72901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20408 states to 20408 states and 72901 transitions. [2021-08-06 14:20:45,030 INFO L78 Accepts]: Start accepts. Automaton has 20408 states and 72901 transitions. Word has length 22 [2021-08-06 14:20:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:45,030 INFO L470 AbstractCegarLoop]: Abstraction has 20408 states and 72901 transitions. [2021-08-06 14:20:45,030 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) [2021-08-06 14:20:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 20408 states and 72901 transitions. [2021-08-06 14:20:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:45,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:45,037 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:45,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-06 14:20:45,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 14:20:45,240 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:45,240 INFO L82 PathProgramCache]: Analyzing trace with hash 709085684, now seen corresponding path program 142 times [2021-08-06 14:20:45,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:45,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627267840] [2021-08-06 14:20:45,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:45,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:45,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:45,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627267840] [2021-08-06 14:20:45,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627267840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:45,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312974469] [2021-08-06 14:20:45,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:20:45,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:45,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:45,445 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:45,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 14:20:46,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:20:46,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:46,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:46,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312974469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:46,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:46,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:20:46,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110889281] [2021-08-06 14:20:46,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:20:46,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:20:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:20:46,835 INFO L87 Difference]: Start difference. First operand 20408 states and 72901 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) [2021-08-06 14:20:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:47,354 INFO L93 Difference]: Finished difference Result 22052 states and 77256 transitions. [2021-08-06 14:20:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:20:47,355 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 [2021-08-06 14:20:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:47,434 INFO L225 Difference]: With dead ends: 22052 [2021-08-06 14:20:47,435 INFO L226 Difference]: Without dead ends: 22052 [2021-08-06 14:20:47,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:20:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22052 states. [2021-08-06 14:20:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22052 to 21220. [2021-08-06 14:20:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21220 states, 21219 states have (on average 3.5682642914369196) internal successors, (75715), 21219 states have internal predecessors, (75715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21220 states to 21220 states and 75715 transitions. [2021-08-06 14:20:48,183 INFO L78 Accepts]: Start accepts. Automaton has 21220 states and 75715 transitions. Word has length 22 [2021-08-06 14:20:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:48,183 INFO L470 AbstractCegarLoop]: Abstraction has 21220 states and 75715 transitions. [2021-08-06 14:20:48,183 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) [2021-08-06 14:20:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 21220 states and 75715 transitions. [2021-08-06 14:20:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:48,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:48,191 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:48,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:48,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 14:20:48,393 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:48,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:48,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1473145040, now seen corresponding path program 143 times [2021-08-06 14:20:48,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:48,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019211067] [2021-08-06 14:20:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:48,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:20:48,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:48,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019211067] [2021-08-06 14:20:48,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019211067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:48,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916256602] [2021-08-06 14:20:48,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:20:48,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:48,487 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:48,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 14:20:49,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:20:49,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:49,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:20:50,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916256602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:50,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:50,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 14:20:50,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616265675] [2021-08-06 14:20:50,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:20:50,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:20:50,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:20:50,080 INFO L87 Difference]: Start difference. First operand 21220 states and 75715 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:50,450 INFO L93 Difference]: Finished difference Result 25865 states and 91963 transitions. [2021-08-06 14:20:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:20:50,450 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 22 [2021-08-06 14:20:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:50,560 INFO L225 Difference]: With dead ends: 25865 [2021-08-06 14:20:50,560 INFO L226 Difference]: Without dead ends: 25861 [2021-08-06 14:20:50,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:20:50,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25861 states. [2021-08-06 14:20:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25861 to 24108. [2021-08-06 14:20:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24108 states, 24107 states have (on average 3.577052308458124) internal successors, (86232), 24107 states have internal predecessors, (86232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24108 states to 24108 states and 86232 transitions. [2021-08-06 14:20:51,399 INFO L78 Accepts]: Start accepts. Automaton has 24108 states and 86232 transitions. Word has length 22 [2021-08-06 14:20:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:51,400 INFO L470 AbstractCegarLoop]: Abstraction has 24108 states and 86232 transitions. [2021-08-06 14:20:51,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 24108 states and 86232 transitions. [2021-08-06 14:20:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:51,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:51,411 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:51,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:51,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 14:20:51,633 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1421125456, now seen corresponding path program 144 times [2021-08-06 14:20:51,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:51,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572359083] [2021-08-06 14:20:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:51,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:20:51,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:51,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572359083] [2021-08-06 14:20:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572359083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:51,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884237415] [2021-08-06 14:20:51,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:20:51,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:51,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:51,941 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:51,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 14:20:53,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:20:53,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:20:53,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884237415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:53,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:53,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 14:20:53,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545002960] [2021-08-06 14:20:53,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:20:53,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:53,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:20:53,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:20:53,418 INFO L87 Difference]: Start difference. First operand 24108 states and 86232 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:53,702 INFO L93 Difference]: Finished difference Result 27586 states and 97099 transitions. [2021-08-06 14:20:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:20:53,703 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 [2021-08-06 14:20:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:53,817 INFO L225 Difference]: With dead ends: 27586 [2021-08-06 14:20:53,817 INFO L226 Difference]: Without dead ends: 27586 [2021-08-06 14:20:53,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:20:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27586 states. [2021-08-06 14:20:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27586 to 26628. [2021-08-06 14:20:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26628 states, 26627 states have (on average 3.5738536072407707) internal successors, (95161), 26627 states have internal predecessors, (95161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26628 states to 26628 states and 95161 transitions. [2021-08-06 14:20:54,722 INFO L78 Accepts]: Start accepts. Automaton has 26628 states and 95161 transitions. Word has length 22 [2021-08-06 14:20:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:54,722 INFO L470 AbstractCegarLoop]: Abstraction has 26628 states and 95161 transitions. [2021-08-06 14:20:54,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 26628 states and 95161 transitions. [2021-08-06 14:20:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:54,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:54,733 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:54,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:54,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:54,960 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:54,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1864024596, now seen corresponding path program 145 times [2021-08-06 14:20:54,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:54,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714695256] [2021-08-06 14:20:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:54,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:55,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:55,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714695256] [2021-08-06 14:20:55,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714695256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:55,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514467688] [2021-08-06 14:20:55,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:20:55,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:55,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:55,064 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:55,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 14:20:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:56,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:56,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:20:56,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514467688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:56,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:56,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:20:56,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848975079] [2021-08-06 14:20:56,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:20:56,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:20:56,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:20:56,518 INFO L87 Difference]: Start difference. First operand 26628 states and 95161 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) [2021-08-06 14:20:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:20:56,939 INFO L93 Difference]: Finished difference Result 29739 states and 104277 transitions. [2021-08-06 14:20:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:20:56,940 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 [2021-08-06 14:20:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:20:57,067 INFO L225 Difference]: With dead ends: 29739 [2021-08-06 14:20:57,067 INFO L226 Difference]: Without dead ends: 29739 [2021-08-06 14:20:57,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:20:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29739 states. [2021-08-06 14:20:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29739 to 25750. [2021-08-06 14:20:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25750 states, 25749 states have (on average 3.569109479979805) internal successors, (91901), 25749 states have internal predecessors, (91901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:20:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25750 states to 25750 states and 91901 transitions. [2021-08-06 14:20:57,864 INFO L78 Accepts]: Start accepts. Automaton has 25750 states and 91901 transitions. Word has length 22 [2021-08-06 14:20:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:20:57,864 INFO L470 AbstractCegarLoop]: Abstraction has 25750 states and 91901 transitions. [2021-08-06 14:20:57,864 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) [2021-08-06 14:20:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 25750 states and 91901 transitions. [2021-08-06 14:20:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:20:57,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:20:57,873 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:20:57,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-06 14:20:58,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:58,074 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:20:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:20:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash -769933008, now seen corresponding path program 146 times [2021-08-06 14:20:58,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:20:58,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330272919] [2021-08-06 14:20:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:20:58,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:20:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:20:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:20:58,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:20:58,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330272919] [2021-08-06 14:20:58,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330272919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:58,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440236358] [2021-08-06 14:20:58,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:20:58,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:20:58,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:20:58,181 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:20:58,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 14:20:59,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:20:59,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:20:59,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:20:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:20:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:20:59,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440236358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:20:59,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:20:59,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:20:59,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596648993] [2021-08-06 14:20:59,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:20:59,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:20:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:20:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:20:59,760 INFO L87 Difference]: Start difference. First operand 25750 states and 91901 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) [2021-08-06 14:21:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:00,143 INFO L93 Difference]: Finished difference Result 29235 states and 102840 transitions. [2021-08-06 14:21:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:21:00,144 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 [2021-08-06 14:21:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:00,233 INFO L225 Difference]: With dead ends: 29235 [2021-08-06 14:21:00,234 INFO L226 Difference]: Without dead ends: 29235 [2021-08-06 14:21:00,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:21:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29235 states. [2021-08-06 14:21:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29235 to 28361. [2021-08-06 14:21:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28361 states, 28360 states have (on average 3.5681241184767276) internal successors, (101192), 28360 states have internal predecessors, (101192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28361 states to 28361 states and 101192 transitions. [2021-08-06 14:21:01,014 INFO L78 Accepts]: Start accepts. Automaton has 28361 states and 101192 transitions. Word has length 22 [2021-08-06 14:21:01,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:01,014 INFO L470 AbstractCegarLoop]: Abstraction has 28361 states and 101192 transitions. [2021-08-06 14:21:01,015 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) [2021-08-06 14:21:01,015 INFO L276 IsEmpty]: Start isEmpty. Operand 28361 states and 101192 transitions. [2021-08-06 14:21:01,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:01,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:01,025 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:01,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-06 14:21:01,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-06 14:21:01,226 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:01,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:01,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1585971248, now seen corresponding path program 147 times [2021-08-06 14:21:01,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:01,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019620090] [2021-08-06 14:21:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:01,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:01,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:01,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019620090] [2021-08-06 14:21:01,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019620090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:01,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122297207] [2021-08-06 14:21:01,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:21:01,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:01,329 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:01,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 14:21:02,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:21:02,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:02,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:02,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:02,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122297207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:02,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:02,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:21:02,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243598735] [2021-08-06 14:21:02,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:21:02,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:02,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:21:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:21:02,709 INFO L87 Difference]: Start difference. First operand 28361 states and 101192 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:03,019 INFO L93 Difference]: Finished difference Result 31605 states and 110626 transitions. [2021-08-06 14:21:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:21:03,020 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 [2021-08-06 14:21:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:03,112 INFO L225 Difference]: With dead ends: 31605 [2021-08-06 14:21:03,112 INFO L226 Difference]: Without dead ends: 31605 [2021-08-06 14:21:03,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:21:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31605 states. [2021-08-06 14:21:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31605 to 23380. [2021-08-06 14:21:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23380 states, 23379 states have (on average 3.5418965738483252) internal successors, (82806), 23379 states have internal predecessors, (82806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23380 states to 23380 states and 82806 transitions. [2021-08-06 14:21:03,894 INFO L78 Accepts]: Start accepts. Automaton has 23380 states and 82806 transitions. Word has length 22 [2021-08-06 14:21:03,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:03,894 INFO L470 AbstractCegarLoop]: Abstraction has 23380 states and 82806 transitions. [2021-08-06 14:21:03,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 23380 states and 82806 transitions. [2021-08-06 14:21:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:03,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:03,904 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:03,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-06 14:21:04,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:04,105 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1614904460, now seen corresponding path program 148 times [2021-08-06 14:21:04,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:04,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295024231] [2021-08-06 14:21:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:04,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:04,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:04,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295024231] [2021-08-06 14:21:04,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295024231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:04,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919796717] [2021-08-06 14:21:04,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:21:04,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:04,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:04,209 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:04,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 14:21:05,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:21:05,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:05,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:05,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:05,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919796717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:05,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:05,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:21:05,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262620355] [2021-08-06 14:21:05,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:21:05,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:05,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:21:05,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:21:05,557 INFO L87 Difference]: Start difference. First operand 23380 states and 82806 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:05,867 INFO L93 Difference]: Finished difference Result 27007 states and 94318 transitions. [2021-08-06 14:21:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:21:05,868 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 [2021-08-06 14:21:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:05,945 INFO L225 Difference]: With dead ends: 27007 [2021-08-06 14:21:05,945 INFO L226 Difference]: Without dead ends: 27007 [2021-08-06 14:21:05,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:21:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27007 states. [2021-08-06 14:21:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27007 to 23526. [2021-08-06 14:21:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23526 states, 23525 states have (on average 3.5427842720510094) internal successors, (83344), 23525 states have internal predecessors, (83344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23526 states to 23526 states and 83344 transitions. [2021-08-06 14:21:06,670 INFO L78 Accepts]: Start accepts. Automaton has 23526 states and 83344 transitions. Word has length 22 [2021-08-06 14:21:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:06,671 INFO L470 AbstractCegarLoop]: Abstraction has 23526 states and 83344 transitions. [2021-08-06 14:21:06,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 23526 states and 83344 transitions. [2021-08-06 14:21:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:06,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:06,683 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:06,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-06 14:21:06,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:06,909 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2057803600, now seen corresponding path program 149 times [2021-08-06 14:21:06,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:06,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812505010] [2021-08-06 14:21:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:06,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:07,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:07,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812505010] [2021-08-06 14:21:07,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812505010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:07,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337241281] [2021-08-06 14:21:07,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:21:07,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:07,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:07,036 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:07,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 14:21:08,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:21:08,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:08,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:08,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337241281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:08,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:08,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:21:08,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434317275] [2021-08-06 14:21:08,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:21:08,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:21:08,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:21:08,612 INFO L87 Difference]: Start difference. First operand 23526 states and 83344 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:09,058 INFO L93 Difference]: Finished difference Result 25764 states and 89832 transitions. [2021-08-06 14:21:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:21:09,069 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 [2021-08-06 14:21:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:09,167 INFO L225 Difference]: With dead ends: 25764 [2021-08-06 14:21:09,168 INFO L226 Difference]: Without dead ends: 25764 [2021-08-06 14:21:09,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:21:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25764 states. [2021-08-06 14:21:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25764 to 24974. [2021-08-06 14:21:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24974 states, 24973 states have (on average 3.5417050414447604) internal successors, (88447), 24973 states have internal predecessors, (88447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24974 states to 24974 states and 88447 transitions. [2021-08-06 14:21:10,100 INFO L78 Accepts]: Start accepts. Automaton has 24974 states and 88447 transitions. Word has length 22 [2021-08-06 14:21:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:10,100 INFO L470 AbstractCegarLoop]: Abstraction has 24974 states and 88447 transitions. [2021-08-06 14:21:10,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 24974 states and 88447 transitions. [2021-08-06 14:21:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:10,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:10,111 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:10,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-06 14:21:10,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:10,337 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:10,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:10,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1161660012, now seen corresponding path program 150 times [2021-08-06 14:21:10,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:10,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553847977] [2021-08-06 14:21:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:10,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:10,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:10,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553847977] [2021-08-06 14:21:10,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553847977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:10,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477498266] [2021-08-06 14:21:10,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:21:10,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:10,645 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:10,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 14:21:12,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:21:12,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:12,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:12,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:12,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477498266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:12,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:12,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:21:12,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658471692] [2021-08-06 14:21:12,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:21:12,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:21:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:21:12,164 INFO L87 Difference]: Start difference. First operand 24974 states and 88447 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) [2021-08-06 14:21:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:12,495 INFO L93 Difference]: Finished difference Result 26571 states and 92565 transitions. [2021-08-06 14:21:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:21:12,495 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 [2021-08-06 14:21:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:12,603 INFO L225 Difference]: With dead ends: 26571 [2021-08-06 14:21:12,603 INFO L226 Difference]: Without dead ends: 26571 [2021-08-06 14:21:12,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:21:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26571 states. [2021-08-06 14:21:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26571 to 18946. [2021-08-06 14:21:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18946 states, 18945 states have (on average 3.5239904988123514) internal successors, (66762), 18945 states have internal predecessors, (66762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18946 states to 18946 states and 66762 transitions. [2021-08-06 14:21:13,329 INFO L78 Accepts]: Start accepts. Automaton has 18946 states and 66762 transitions. Word has length 22 [2021-08-06 14:21:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:13,330 INFO L470 AbstractCegarLoop]: Abstraction has 18946 states and 66762 transitions. [2021-08-06 14:21:13,330 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) [2021-08-06 14:21:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 18946 states and 66762 transitions. [2021-08-06 14:21:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:13,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:13,341 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:13,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-06 14:21:13,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:13,542 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:13,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2039215696, now seen corresponding path program 151 times [2021-08-06 14:21:13,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:13,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958981265] [2021-08-06 14:21:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:13,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:13,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:13,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958981265] [2021-08-06 14:21:13,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958981265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:13,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200531046] [2021-08-06 14:21:13,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:21:13,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:13,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:13,666 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:13,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 14:21:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:15,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:15,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200531046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:15,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:15,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:21:15,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013191527] [2021-08-06 14:21:15,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:21:15,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:15,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:21:15,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:21:15,193 INFO L87 Difference]: Start difference. First operand 18946 states and 66762 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) [2021-08-06 14:21:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:15,461 INFO L93 Difference]: Finished difference Result 22849 states and 79385 transitions. [2021-08-06 14:21:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:21:15,461 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 [2021-08-06 14:21:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:15,626 INFO L225 Difference]: With dead ends: 22849 [2021-08-06 14:21:15,626 INFO L226 Difference]: Without dead ends: 22849 [2021-08-06 14:21:15,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:21:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22849 states. [2021-08-06 14:21:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22849 to 18538. [2021-08-06 14:21:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18538 states, 18537 states have (on average 3.5261369153584723) internal successors, (65364), 18537 states have internal predecessors, (65364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18538 states to 18538 states and 65364 transitions. [2021-08-06 14:21:16,050 INFO L78 Accepts]: Start accepts. Automaton has 18538 states and 65364 transitions. Word has length 22 [2021-08-06 14:21:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:16,050 INFO L470 AbstractCegarLoop]: Abstraction has 18538 states and 65364 transitions. [2021-08-06 14:21:16,050 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) [2021-08-06 14:21:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 18538 states and 65364 transitions. [2021-08-06 14:21:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:16,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:16,058 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:16,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-06 14:21:16,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:16,259 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:16,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1812852460, now seen corresponding path program 152 times [2021-08-06 14:21:16,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:16,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540500040] [2021-08-06 14:21:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:16,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:16,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:16,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540500040] [2021-08-06 14:21:16,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540500040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:16,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549157892] [2021-08-06 14:21:16,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:21:16,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:16,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:16,375 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:16,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 14:21:17,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:21:17,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:17,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:17,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:17,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549157892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:17,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:17,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:21:17,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127538417] [2021-08-06 14:21:17,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:21:17,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:21:17,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:21:17,783 INFO L87 Difference]: Start difference. First operand 18538 states and 65364 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) [2021-08-06 14:21:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:18,160 INFO L93 Difference]: Finished difference Result 19998 states and 69265 transitions. [2021-08-06 14:21:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:21:18,160 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 [2021-08-06 14:21:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:18,216 INFO L225 Difference]: With dead ends: 19998 [2021-08-06 14:21:18,217 INFO L226 Difference]: Without dead ends: 19998 [2021-08-06 14:21:18,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:21:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19998 states. [2021-08-06 14:21:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19998 to 18073. [2021-08-06 14:21:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18073 states, 18072 states have (on average 3.5291611332447985) internal successors, (63779), 18072 states have internal predecessors, (63779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18073 states to 18073 states and 63779 transitions. [2021-08-06 14:21:18,654 INFO L78 Accepts]: Start accepts. Automaton has 18073 states and 63779 transitions. Word has length 22 [2021-08-06 14:21:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:18,654 INFO L470 AbstractCegarLoop]: Abstraction has 18073 states and 63779 transitions. [2021-08-06 14:21:18,654 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) [2021-08-06 14:21:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 18073 states and 63779 transitions. [2021-08-06 14:21:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:18,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:18,662 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:18,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-06 14:21:18,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-06 14:21:18,862 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash 967881008, now seen corresponding path program 153 times [2021-08-06 14:21:18,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:18,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386253643] [2021-08-06 14:21:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:18,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:18,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:18,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386253643] [2021-08-06 14:21:18,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386253643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:18,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631730923] [2021-08-06 14:21:18,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:21:18,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:18,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:18,978 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:18,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 14:21:20,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:21:20,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:20,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:20,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631730923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:20,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:20,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:21:20,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300651191] [2021-08-06 14:21:20,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:21:20,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:20,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:21:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:21:20,394 INFO L87 Difference]: Start difference. First operand 18073 states and 63779 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) [2021-08-06 14:21:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:20,903 INFO L93 Difference]: Finished difference Result 19320 states and 66635 transitions. [2021-08-06 14:21:20,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:21:20,903 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 [2021-08-06 14:21:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:20,956 INFO L225 Difference]: With dead ends: 19320 [2021-08-06 14:21:20,956 INFO L226 Difference]: Without dead ends: 19320 [2021-08-06 14:21:20,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:21:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19320 states. [2021-08-06 14:21:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19320 to 17988. [2021-08-06 14:21:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17988 states, 17987 states have (on average 3.5308834158003) internal successors, (63510), 17987 states have internal predecessors, (63510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17988 states to 17988 states and 63510 transitions. [2021-08-06 14:21:21,384 INFO L78 Accepts]: Start accepts. Automaton has 17988 states and 63510 transitions. Word has length 22 [2021-08-06 14:21:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:21,384 INFO L470 AbstractCegarLoop]: Abstraction has 17988 states and 63510 transitions. [2021-08-06 14:21:21,384 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) [2021-08-06 14:21:21,384 INFO L276 IsEmpty]: Start isEmpty. Operand 17988 states and 63510 transitions. [2021-08-06 14:21:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:21,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:21,392 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:21,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-06 14:21:21,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:21,593 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash 622852516, now seen corresponding path program 154 times [2021-08-06 14:21:21,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:21,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675472790] [2021-08-06 14:21:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:21,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:21,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:21,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675472790] [2021-08-06 14:21:21,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675472790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:21,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073009075] [2021-08-06 14:21:21,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:21:21,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:21,702 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:21,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 14:21:23,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:21:23,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:21:23,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073009075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:23,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:23,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:21:23,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118933800] [2021-08-06 14:21:23,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:21:23,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:23,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:21:23,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:21:23,131 INFO L87 Difference]: Start difference. First operand 17988 states and 63510 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) [2021-08-06 14:21:23,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:23,387 INFO L93 Difference]: Finished difference Result 18308 states and 63939 transitions. [2021-08-06 14:21:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:21:23,388 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 [2021-08-06 14:21:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:23,437 INFO L225 Difference]: With dead ends: 18308 [2021-08-06 14:21:23,437 INFO L226 Difference]: Without dead ends: 18304 [2021-08-06 14:21:23,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:21:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-08-06 14:21:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 17528. [2021-08-06 14:21:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17528 states, 17527 states have (on average 3.5298682033434132) internal successors, (61868), 17527 states have internal predecessors, (61868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17528 states to 17528 states and 61868 transitions. [2021-08-06 14:21:23,936 INFO L78 Accepts]: Start accepts. Automaton has 17528 states and 61868 transitions. Word has length 22 [2021-08-06 14:21:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:23,936 INFO L470 AbstractCegarLoop]: Abstraction has 17528 states and 61868 transitions. [2021-08-06 14:21:23,936 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) [2021-08-06 14:21:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 17528 states and 61868 transitions. [2021-08-06 14:21:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:23,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:23,944 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:23,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-06 14:21:24,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 14:21:24,144 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:24,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1234019340, now seen corresponding path program 155 times [2021-08-06 14:21:24,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:24,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98939001] [2021-08-06 14:21:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:24,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:24,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:24,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98939001] [2021-08-06 14:21:24,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98939001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:24,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034046367] [2021-08-06 14:21:24,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:21:24,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:24,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:24,252 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:24,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 14:21:25,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:21:25,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:25,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:25,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034046367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:25,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:25,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:21:25,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753324180] [2021-08-06 14:21:25,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:21:25,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:25,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:21:25,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:21:25,772 INFO L87 Difference]: Start difference. First operand 17528 states and 61868 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) [2021-08-06 14:21:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:25,939 INFO L93 Difference]: Finished difference Result 17977 states and 62614 transitions. [2021-08-06 14:21:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:21:25,940 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 [2021-08-06 14:21:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:25,991 INFO L225 Difference]: With dead ends: 17977 [2021-08-06 14:21:25,992 INFO L226 Difference]: Without dead ends: 17977 [2021-08-06 14:21:25,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:21:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17977 states. [2021-08-06 14:21:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17977 to 17545. [2021-08-06 14:21:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.528043775649795) internal successors, (61896), 17544 states have internal predecessors, (61896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 61896 transitions. [2021-08-06 14:21:26,404 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 61896 transitions. Word has length 22 [2021-08-06 14:21:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:26,404 INFO L470 AbstractCegarLoop]: Abstraction has 17545 states and 61896 transitions. [2021-08-06 14:21:26,404 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) [2021-08-06 14:21:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 61896 transitions. [2021-08-06 14:21:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:26,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:26,411 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:26,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-06 14:21:26,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 14:21:26,612 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:26,612 INFO L82 PathProgramCache]: Analyzing trace with hash 476593968, now seen corresponding path program 156 times [2021-08-06 14:21:26,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:26,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893022176] [2021-08-06 14:21:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:26,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:26,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:26,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893022176] [2021-08-06 14:21:26,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893022176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:26,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223682768] [2021-08-06 14:21:26,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:21:26,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:26,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:26,807 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:26,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 14:21:28,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:21:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:28,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:28,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:28,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223682768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:28,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:28,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:21:28,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084301529] [2021-08-06 14:21:28,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:21:28,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:28,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:21:28,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:21:28,429 INFO L87 Difference]: Start difference. First operand 17545 states and 61896 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:28,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:28,604 INFO L93 Difference]: Finished difference Result 18028 states and 62675 transitions. [2021-08-06 14:21:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:21:28,604 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 [2021-08-06 14:21:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:28,651 INFO L225 Difference]: With dead ends: 18028 [2021-08-06 14:21:28,651 INFO L226 Difference]: Without dead ends: 18028 [2021-08-06 14:21:28,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:21:28,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2021-08-06 14:21:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 17514. [2021-08-06 14:21:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17514 states, 17513 states have (on average 3.5241820362016787) internal successors, (61719), 17513 states have internal predecessors, (61719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17514 states to 17514 states and 61719 transitions. [2021-08-06 14:21:29,116 INFO L78 Accepts]: Start accepts. Automaton has 17514 states and 61719 transitions. Word has length 22 [2021-08-06 14:21:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:29,116 INFO L470 AbstractCegarLoop]: Abstraction has 17514 states and 61719 transitions. [2021-08-06 14:21:29,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 17514 states and 61719 transitions. [2021-08-06 14:21:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:29,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:29,123 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:29,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-06 14:21:29,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-06 14:21:29,324 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:29,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:29,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1965998964, now seen corresponding path program 157 times [2021-08-06 14:21:29,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:29,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835887925] [2021-08-06 14:21:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:29,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:21:29,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:29,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835887925] [2021-08-06 14:21:29,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835887925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:29,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803710744] [2021-08-06 14:21:29,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:21:29,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:29,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:29,422 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:29,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 14:21:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:30,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:21:30,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803710744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:30,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:30,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:21:30,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451595250] [2021-08-06 14:21:30,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:21:30,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:21:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:21:30,965 INFO L87 Difference]: Start difference. First operand 17514 states and 61719 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:31,233 INFO L93 Difference]: Finished difference Result 26489 states and 92103 transitions. [2021-08-06 14:21:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:21:31,234 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 [2021-08-06 14:21:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:31,352 INFO L225 Difference]: With dead ends: 26489 [2021-08-06 14:21:31,352 INFO L226 Difference]: Without dead ends: 26489 [2021-08-06 14:21:31,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:21:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26489 states. [2021-08-06 14:21:31,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26489 to 25880. [2021-08-06 14:21:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25880 states, 25879 states have (on average 3.5140461377951233) internal successors, (90940), 25879 states have internal predecessors, (90940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25880 states to 25880 states and 90940 transitions. [2021-08-06 14:21:32,132 INFO L78 Accepts]: Start accepts. Automaton has 25880 states and 90940 transitions. Word has length 22 [2021-08-06 14:21:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:32,132 INFO L470 AbstractCegarLoop]: Abstraction has 25880 states and 90940 transitions. [2021-08-06 14:21:32,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:32,133 INFO L276 IsEmpty]: Start isEmpty. Operand 25880 states and 90940 transitions. [2021-08-06 14:21:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:32,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:32,143 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:32,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 14:21:32,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:32,357 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:32,357 INFO L82 PathProgramCache]: Analyzing trace with hash 892913584, now seen corresponding path program 158 times [2021-08-06 14:21:32,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:32,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078753403] [2021-08-06 14:21:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:32,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:32,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:32,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078753403] [2021-08-06 14:21:32,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078753403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:32,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861677620] [2021-08-06 14:21:32,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:21:32,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:32,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:32,477 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:32,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 14:21:33,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:21:33,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:33,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:34,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861677620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:34,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:34,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:21:34,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538895957] [2021-08-06 14:21:34,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:21:34,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:21:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:21:34,074 INFO L87 Difference]: Start difference. First operand 25880 states and 90940 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) [2021-08-06 14:21:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:34,344 INFO L93 Difference]: Finished difference Result 26812 states and 92943 transitions. [2021-08-06 14:21:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:21:34,344 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 [2021-08-06 14:21:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:34,450 INFO L225 Difference]: With dead ends: 26812 [2021-08-06 14:21:34,450 INFO L226 Difference]: Without dead ends: 26812 [2021-08-06 14:21:34,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:21:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26812 states. [2021-08-06 14:21:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26812 to 25924. [2021-08-06 14:21:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25924 states, 25923 states have (on average 3.5124406897349845) internal successors, (91053), 25923 states have internal predecessors, (91053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25924 states to 25924 states and 91053 transitions. [2021-08-06 14:21:35,297 INFO L78 Accepts]: Start accepts. Automaton has 25924 states and 91053 transitions. Word has length 22 [2021-08-06 14:21:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:35,297 INFO L470 AbstractCegarLoop]: Abstraction has 25924 states and 91053 transitions. [2021-08-06 14:21:35,297 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) [2021-08-06 14:21:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 25924 states and 91053 transitions. [2021-08-06 14:21:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:35,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:35,307 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:35,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-06 14:21:35,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:35,533 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:35,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1987005172, now seen corresponding path program 159 times [2021-08-06 14:21:35,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:35,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174320756] [2021-08-06 14:21:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:35,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:35,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:35,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174320756] [2021-08-06 14:21:35,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174320756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:35,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067467645] [2021-08-06 14:21:35,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:21:35,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:35,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:35,670 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:35,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 14:21:37,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:21:37,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:37,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:37,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067467645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:37,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:37,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:21:37,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214929051] [2021-08-06 14:21:37,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:21:37,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:37,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:21:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:21:37,360 INFO L87 Difference]: Start difference. First operand 25924 states and 91053 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) [2021-08-06 14:21:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:37,684 INFO L93 Difference]: Finished difference Result 28899 states and 100425 transitions. [2021-08-06 14:21:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:21:37,684 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 [2021-08-06 14:21:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:37,782 INFO L225 Difference]: With dead ends: 28899 [2021-08-06 14:21:37,782 INFO L226 Difference]: Without dead ends: 28899 [2021-08-06 14:21:37,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:21:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28899 states. [2021-08-06 14:21:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28899 to 28461. [2021-08-06 14:21:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28461 states, 28460 states have (on average 3.503513703443429) internal successors, (99710), 28460 states have internal predecessors, (99710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28461 states to 28461 states and 99710 transitions. [2021-08-06 14:21:38,735 INFO L78 Accepts]: Start accepts. Automaton has 28461 states and 99710 transitions. Word has length 22 [2021-08-06 14:21:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:38,735 INFO L470 AbstractCegarLoop]: Abstraction has 28461 states and 99710 transitions. [2021-08-06 14:21:38,735 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) [2021-08-06 14:21:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 28461 states and 99710 transitions. [2021-08-06 14:21:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:38,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:38,747 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:38,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-06 14:21:38,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:38,973 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:38,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1544106032, now seen corresponding path program 160 times [2021-08-06 14:21:38,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:38,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064137972] [2021-08-06 14:21:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:38,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:39,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:39,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064137972] [2021-08-06 14:21:39,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064137972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:39,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758361840] [2021-08-06 14:21:39,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:21:39,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:39,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:39,115 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:39,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-06 14:21:40,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:21:40,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:40,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758361840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:40,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:40,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:21:40,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593259420] [2021-08-06 14:21:40,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:21:40,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:21:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:21:40,714 INFO L87 Difference]: Start difference. First operand 28461 states and 99710 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) [2021-08-06 14:21:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:41,056 INFO L93 Difference]: Finished difference Result 29845 states and 103526 transitions. [2021-08-06 14:21:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:21:41,057 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 [2021-08-06 14:21:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:41,159 INFO L225 Difference]: With dead ends: 29845 [2021-08-06 14:21:41,159 INFO L226 Difference]: Without dead ends: 29845 [2021-08-06 14:21:41,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:21:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29845 states. [2021-08-06 14:21:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29845 to 29445. [2021-08-06 14:21:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29445 states, 29444 states have (on average 3.4953470995788614) internal successors, (102917), 29444 states have internal predecessors, (102917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29445 states to 29445 states and 102917 transitions. [2021-08-06 14:21:41,845 INFO L78 Accepts]: Start accepts. Automaton has 29445 states and 102917 transitions. Word has length 22 [2021-08-06 14:21:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:41,846 INFO L470 AbstractCegarLoop]: Abstraction has 29445 states and 102917 transitions. [2021-08-06 14:21:41,846 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) [2021-08-06 14:21:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 29445 states and 102917 transitions. [2021-08-06 14:21:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:41,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:41,855 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:41,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-06 14:21:42,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:42,056 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:42,056 INFO L82 PathProgramCache]: Analyzing trace with hash 699134580, now seen corresponding path program 161 times [2021-08-06 14:21:42,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:42,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847476864] [2021-08-06 14:21:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:42,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:42,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:42,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847476864] [2021-08-06 14:21:42,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847476864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:42,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88423928] [2021-08-06 14:21:42,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:21:42,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:42,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:42,167 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:42,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-06 14:21:43,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:21:43,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:43,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:43,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:43,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88423928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:43,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:43,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:21:43,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435629134] [2021-08-06 14:21:43,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:21:43,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:43,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:21:43,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:21:43,692 INFO L87 Difference]: Start difference. First operand 29445 states and 102917 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) [2021-08-06 14:21:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:44,228 INFO L93 Difference]: Finished difference Result 30326 states and 104844 transitions. [2021-08-06 14:21:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:21:44,229 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 [2021-08-06 14:21:44,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:44,323 INFO L225 Difference]: With dead ends: 30326 [2021-08-06 14:21:44,323 INFO L226 Difference]: Without dead ends: 30326 [2021-08-06 14:21:44,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:21:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30326 states. [2021-08-06 14:21:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30326 to 29748. [2021-08-06 14:21:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29748 states, 29747 states have (on average 3.4920832352842304) internal successors, (103879), 29747 states have internal predecessors, (103879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29748 states to 29748 states and 103879 transitions. [2021-08-06 14:21:45,094 INFO L78 Accepts]: Start accepts. Automaton has 29748 states and 103879 transitions. Word has length 22 [2021-08-06 14:21:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:45,094 INFO L470 AbstractCegarLoop]: Abstraction has 29748 states and 103879 transitions. [2021-08-06 14:21:45,094 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) [2021-08-06 14:21:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 29748 states and 103879 transitions. [2021-08-06 14:21:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:45,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:45,105 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:45,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-08-06 14:21:45,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:45,305 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:45,306 INFO L82 PathProgramCache]: Analyzing trace with hash 274823344, now seen corresponding path program 162 times [2021-08-06 14:21:45,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:45,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2385463] [2021-08-06 14:21:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:45,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:45,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:45,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2385463] [2021-08-06 14:21:45,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2385463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:45,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654893627] [2021-08-06 14:21:45,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:21:45,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:45,445 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:45,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-06 14:21:46,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:21:46,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:47,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654893627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:47,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:47,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:21:47,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871160915] [2021-08-06 14:21:47,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:21:47,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:47,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:21:47,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:21:47,003 INFO L87 Difference]: Start difference. First operand 29748 states and 103879 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) [2021-08-06 14:21:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:47,647 INFO L93 Difference]: Finished difference Result 30822 states and 106235 transitions. [2021-08-06 14:21:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 14:21:47,648 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 [2021-08-06 14:21:47,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:47,741 INFO L225 Difference]: With dead ends: 30822 [2021-08-06 14:21:47,741 INFO L226 Difference]: Without dead ends: 30822 [2021-08-06 14:21:47,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 14:21:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30822 states. [2021-08-06 14:21:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30822 to 29952. [2021-08-06 14:21:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29952 states, 29951 states have (on average 3.489265800807986) internal successors, (104507), 29951 states have internal predecessors, (104507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29952 states to 29952 states and 104507 transitions. [2021-08-06 14:21:48,505 INFO L78 Accepts]: Start accepts. Automaton has 29952 states and 104507 transitions. Word has length 22 [2021-08-06 14:21:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:48,505 INFO L470 AbstractCegarLoop]: Abstraction has 29952 states and 104507 transitions. [2021-08-06 14:21:48,505 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) [2021-08-06 14:21:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 29952 states and 104507 transitions. [2021-08-06 14:21:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:48,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:48,515 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:48,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-06 14:21:48,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:48,716 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:48,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2040424588, now seen corresponding path program 163 times [2021-08-06 14:21:48,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:48,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47647531] [2021-08-06 14:21:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:48,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:21:48,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:48,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47647531] [2021-08-06 14:21:48,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47647531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:48,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332784030] [2021-08-06 14:21:48,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:21:48,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:48,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:48,805 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:48,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-06 14:21:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:21:50,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332784030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:50,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:50,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 14:21:50,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553077771] [2021-08-06 14:21:50,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:21:50,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:21:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:21:50,344 INFO L87 Difference]: Start difference. First operand 29952 states and 104507 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:50,730 INFO L93 Difference]: Finished difference Result 31445 states and 109140 transitions. [2021-08-06 14:21:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:21:50,730 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 [2021-08-06 14:21:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:50,830 INFO L225 Difference]: With dead ends: 31445 [2021-08-06 14:21:50,830 INFO L226 Difference]: Without dead ends: 31441 [2021-08-06 14:21:50,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:21:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31441 states. [2021-08-06 14:21:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31441 to 28651. [2021-08-06 14:21:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28651 states, 28650 states have (on average 3.4791623036649213) internal successors, (99678), 28650 states have internal predecessors, (99678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28651 states to 28651 states and 99678 transitions. [2021-08-06 14:21:51,664 INFO L78 Accepts]: Start accepts. Automaton has 28651 states and 99678 transitions. Word has length 22 [2021-08-06 14:21:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:51,664 INFO L470 AbstractCegarLoop]: Abstraction has 28651 states and 99678 transitions. [2021-08-06 14:21:51,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 28651 states and 99678 transitions. [2021-08-06 14:21:51,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:51,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:51,674 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:51,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-06 14:21:51,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-06 14:21:51,875 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:51,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1337212556, now seen corresponding path program 164 times [2021-08-06 14:21:51,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:51,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622299857] [2021-08-06 14:21:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:51,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:52,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:52,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622299857] [2021-08-06 14:21:52,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622299857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:52,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831420685] [2021-08-06 14:21:52,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:21:52,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:52,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:52,135 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:52,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-06 14:21:53,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:21:53,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:53,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:53,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:21:53,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831420685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:53,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:53,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:21:53,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100174667] [2021-08-06 14:21:53,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:21:53,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:21:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:21:53,641 INFO L87 Difference]: Start difference. First operand 28651 states and 99678 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) [2021-08-06 14:21:54,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:54,069 INFO L93 Difference]: Finished difference Result 35164 states and 120154 transitions. [2021-08-06 14:21:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:21:54,070 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 [2021-08-06 14:21:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:54,193 INFO L225 Difference]: With dead ends: 35164 [2021-08-06 14:21:54,193 INFO L226 Difference]: Without dead ends: 35164 [2021-08-06 14:21:54,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:21:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35164 states. [2021-08-06 14:21:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35164 to 33612. [2021-08-06 14:21:55,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33612 states, 33611 states have (on average 3.466632947546934) internal successors, (116517), 33611 states have internal predecessors, (116517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33612 states to 33612 states and 116517 transitions. [2021-08-06 14:21:55,352 INFO L78 Accepts]: Start accepts. Automaton has 33612 states and 116517 transitions. Word has length 22 [2021-08-06 14:21:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:55,353 INFO L470 AbstractCegarLoop]: Abstraction has 33612 states and 116517 transitions. [2021-08-06 14:21:55,353 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) [2021-08-06 14:21:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 33612 states and 116517 transitions. [2021-08-06 14:21:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:55,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:55,539 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:55,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-06 14:21:55,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-06 14:21:55,749 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2112783288, now seen corresponding path program 165 times [2021-08-06 14:21:55,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:55,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12971273] [2021-08-06 14:21:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:55,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:55,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:55,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12971273] [2021-08-06 14:21:55,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12971273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:55,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296489270] [2021-08-06 14:21:55,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:21:55,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:55,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:55,868 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:55,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-06 14:21:57,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:21:57,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:21:57,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:21:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:21:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:57,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296489270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:57,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:21:57,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:21:57,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206713878] [2021-08-06 14:21:57,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:21:57,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:21:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:21:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:21:57,558 INFO L87 Difference]: Start difference. First operand 33612 states and 116517 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:21:57,973 INFO L93 Difference]: Finished difference Result 40631 states and 138420 transitions. [2021-08-06 14:21:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:21:57,985 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 [2021-08-06 14:21:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:21:58,119 INFO L225 Difference]: With dead ends: 40631 [2021-08-06 14:21:58,119 INFO L226 Difference]: Without dead ends: 40631 [2021-08-06 14:21:58,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:21:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40631 states. [2021-08-06 14:21:58,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40631 to 29715. [2021-08-06 14:21:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29715 states, 29714 states have (on average 3.459547687958538) internal successors, (102797), 29714 states have internal predecessors, (102797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29715 states to 29715 states and 102797 transitions. [2021-08-06 14:21:59,070 INFO L78 Accepts]: Start accepts. Automaton has 29715 states and 102797 transitions. Word has length 22 [2021-08-06 14:21:59,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:21:59,070 INFO L470 AbstractCegarLoop]: Abstraction has 29715 states and 102797 transitions. [2021-08-06 14:21:59,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:21:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 29715 states and 102797 transitions. [2021-08-06 14:21:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:21:59,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:21:59,084 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:21:59,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-06 14:21:59,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-06 14:21:59,289 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:21:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:21:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1669884148, now seen corresponding path program 166 times [2021-08-06 14:21:59,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:21:59,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884145216] [2021-08-06 14:21:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:21:59,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:21:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:21:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:21:59,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:21:59,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884145216] [2021-08-06 14:21:59,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884145216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:21:59,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797702152] [2021-08-06 14:21:59,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:21:59,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:21:59,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:21:59,397 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:21:59,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-06 14:22:00,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:22:00,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:00,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:00,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797702152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:00,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:00,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:22:00,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262913840] [2021-08-06 14:22:00,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:22:00,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:00,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:22:00,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:22:00,951 INFO L87 Difference]: Start difference. First operand 29715 states and 102797 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:01,588 INFO L93 Difference]: Finished difference Result 35158 states and 119935 transitions. [2021-08-06 14:22:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:22:01,589 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 [2021-08-06 14:22:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:01,730 INFO L225 Difference]: With dead ends: 35158 [2021-08-06 14:22:01,730 INFO L226 Difference]: Without dead ends: 35158 [2021-08-06 14:22:01,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:22:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35158 states. [2021-08-06 14:22:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35158 to 33753. [2021-08-06 14:22:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33753 states, 33752 states have (on average 3.4589357667693768) internal successors, (116746), 33752 states have internal predecessors, (116746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33753 states to 33753 states and 116746 transitions. [2021-08-06 14:22:02,720 INFO L78 Accepts]: Start accepts. Automaton has 33753 states and 116746 transitions. Word has length 22 [2021-08-06 14:22:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:02,721 INFO L470 AbstractCegarLoop]: Abstraction has 33753 states and 116746 transitions. [2021-08-06 14:22:02,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 33753 states and 116746 transitions. [2021-08-06 14:22:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:02,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:02,734 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:02,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:02,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-06 14:22:02,957 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1688472052, now seen corresponding path program 167 times [2021-08-06 14:22:02,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:02,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616245846] [2021-08-06 14:22:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:02,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:03,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:03,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616245846] [2021-08-06 14:22:03,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616245846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:03,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914541184] [2021-08-06 14:22:03,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:22:03,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:03,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:03,072 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:03,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-06 14:22:04,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:22:04,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:04,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:04,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:04,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914541184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:04,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:04,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:04,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819984097] [2021-08-06 14:22:04,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:04,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:04,903 INFO L87 Difference]: Start difference. First operand 33753 states and 116746 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) [2021-08-06 14:22:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:05,537 INFO L93 Difference]: Finished difference Result 36557 states and 124534 transitions. [2021-08-06 14:22:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:22:05,537 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 [2021-08-06 14:22:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:05,685 INFO L225 Difference]: With dead ends: 36557 [2021-08-06 14:22:05,685 INFO L226 Difference]: Without dead ends: 36557 [2021-08-06 14:22:05,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:22:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36557 states. [2021-08-06 14:22:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36557 to 27161. [2021-08-06 14:22:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27161 states, 27160 states have (on average 3.4494845360824744) internal successors, (93688), 27160 states have internal predecessors, (93688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27161 states to 27161 states and 93688 transitions. [2021-08-06 14:22:06,618 INFO L78 Accepts]: Start accepts. Automaton has 27161 states and 93688 transitions. Word has length 22 [2021-08-06 14:22:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:06,618 INFO L470 AbstractCegarLoop]: Abstraction has 27161 states and 93688 transitions. [2021-08-06 14:22:06,618 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) [2021-08-06 14:22:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 27161 states and 93688 transitions. [2021-08-06 14:22:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:06,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:06,629 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:06,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:06,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:06,830 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:06,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:06,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1245572912, now seen corresponding path program 168 times [2021-08-06 14:22:06,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:06,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572385128] [2021-08-06 14:22:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:06,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:06,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:06,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572385128] [2021-08-06 14:22:06,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572385128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:06,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877844635] [2021-08-06 14:22:06,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:22:06,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:06,949 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:06,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-06 14:22:08,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:22:08,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:08,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877844635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:08,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:08,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:08,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783957196] [2021-08-06 14:22:08,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:08,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:08,559 INFO L87 Difference]: Start difference. First operand 27161 states and 93688 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) [2021-08-06 14:22:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:09,018 INFO L93 Difference]: Finished difference Result 32382 states and 110135 transitions. [2021-08-06 14:22:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:22:09,018 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 [2021-08-06 14:22:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:09,116 INFO L225 Difference]: With dead ends: 32382 [2021-08-06 14:22:09,116 INFO L226 Difference]: Without dead ends: 32382 [2021-08-06 14:22:09,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:22:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32382 states. [2021-08-06 14:22:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32382 to 25105. [2021-08-06 14:22:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25105 states, 25104 states have (on average 3.4525971956660295) internal successors, (86674), 25104 states have internal predecessors, (86674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25105 states to 25105 states and 86674 transitions. [2021-08-06 14:22:09,875 INFO L78 Accepts]: Start accepts. Automaton has 25105 states and 86674 transitions. Word has length 22 [2021-08-06 14:22:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:09,875 INFO L470 AbstractCegarLoop]: Abstraction has 25105 states and 86674 transitions. [2021-08-06 14:22:09,875 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) [2021-08-06 14:22:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 25105 states and 86674 transitions. [2021-08-06 14:22:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:09,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:09,885 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:09,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-06 14:22:10,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:10,086 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:10,086 INFO L82 PathProgramCache]: Analyzing trace with hash 400601460, now seen corresponding path program 169 times [2021-08-06 14:22:10,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:10,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374239002] [2021-08-06 14:22:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:10,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:10,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:10,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374239002] [2021-08-06 14:22:10,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374239002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:10,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299513164] [2021-08-06 14:22:10,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:22:10,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:10,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:10,197 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:10,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-06 14:22:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:11,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:11,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299513164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:11,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:11,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:11,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841601652] [2021-08-06 14:22:11,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:11,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:11,800 INFO L87 Difference]: Start difference. First operand 25105 states and 86674 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) [2021-08-06 14:22:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:12,349 INFO L93 Difference]: Finished difference Result 28252 states and 95729 transitions. [2021-08-06 14:22:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:22:12,350 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 [2021-08-06 14:22:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:12,435 INFO L225 Difference]: With dead ends: 28252 [2021-08-06 14:22:12,436 INFO L226 Difference]: Without dead ends: 28252 [2021-08-06 14:22:12,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=642, Invalid=1250, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:22:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-08-06 14:22:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 25259. [2021-08-06 14:22:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25259 states, 25258 states have (on average 3.4541927310159157) internal successors, (87246), 25258 states have internal predecessors, (87246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25259 states to 25259 states and 87246 transitions. [2021-08-06 14:22:13,067 INFO L78 Accepts]: Start accepts. Automaton has 25259 states and 87246 transitions. Word has length 22 [2021-08-06 14:22:13,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:13,067 INFO L470 AbstractCegarLoop]: Abstraction has 25259 states and 87246 transitions. [2021-08-06 14:22:13,067 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) [2021-08-06 14:22:13,067 INFO L276 IsEmpty]: Start isEmpty. Operand 25259 states and 87246 transitions. [2021-08-06 14:22:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:13,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:13,078 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:13,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-08-06 14:22:13,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:13,278 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:13,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:13,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1419725624, now seen corresponding path program 170 times [2021-08-06 14:22:13,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:13,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082284265] [2021-08-06 14:22:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:13,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:13,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:13,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082284265] [2021-08-06 14:22:13,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082284265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:13,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573643707] [2021-08-06 14:22:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:22:13,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:13,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:13,399 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:13,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-06 14:22:14,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:22:14,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:14,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:14,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:15,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573643707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:15,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:15,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:15,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105289689] [2021-08-06 14:22:15,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:15,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:15,014 INFO L87 Difference]: Start difference. First operand 25259 states and 87246 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) [2021-08-06 14:22:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:15,398 INFO L93 Difference]: Finished difference Result 27456 states and 93560 transitions. [2021-08-06 14:22:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:22:15,398 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 [2021-08-06 14:22:15,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:15,485 INFO L225 Difference]: With dead ends: 27456 [2021-08-06 14:22:15,485 INFO L226 Difference]: Without dead ends: 27456 [2021-08-06 14:22:15,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:22:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27456 states. [2021-08-06 14:22:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27456 to 24504. [2021-08-06 14:22:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24504 states, 24503 states have (on average 3.4595355670734196) internal successors, (84769), 24503 states have internal predecessors, (84769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24504 states to 24504 states and 84769 transitions. [2021-08-06 14:22:16,182 INFO L78 Accepts]: Start accepts. Automaton has 24504 states and 84769 transitions. Word has length 22 [2021-08-06 14:22:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:16,182 INFO L470 AbstractCegarLoop]: Abstraction has 24504 states and 84769 transitions. [2021-08-06 14:22:16,182 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) [2021-08-06 14:22:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 24504 states and 84769 transitions. [2021-08-06 14:22:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:16,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:16,192 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:16,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-08-06 14:22:16,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:16,392 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 976826484, now seen corresponding path program 171 times [2021-08-06 14:22:16,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:16,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695245110] [2021-08-06 14:22:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:16,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:16,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:16,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695245110] [2021-08-06 14:22:16,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695245110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:16,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931194010] [2021-08-06 14:22:16,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:22:16,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:16,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:16,496 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:16,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-06 14:22:17,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:22:17,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:18,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931194010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:18,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:18,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:18,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148152958] [2021-08-06 14:22:18,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:18,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:18,098 INFO L87 Difference]: Start difference. First operand 24504 states and 84769 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) [2021-08-06 14:22:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:18,390 INFO L93 Difference]: Finished difference Result 25923 states and 88710 transitions. [2021-08-06 14:22:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:22:18,390 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 [2021-08-06 14:22:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:18,469 INFO L225 Difference]: With dead ends: 25923 [2021-08-06 14:22:18,469 INFO L226 Difference]: Without dead ends: 25923 [2021-08-06 14:22:18,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:22:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25923 states. [2021-08-06 14:22:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25923 to 24906. [2021-08-06 14:22:19,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24906 states, 24905 states have (on average 3.4593856655290103) internal successors, (86156), 24905 states have internal predecessors, (86156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24906 states to 24906 states and 86156 transitions. [2021-08-06 14:22:19,115 INFO L78 Accepts]: Start accepts. Automaton has 24906 states and 86156 transitions. Word has length 22 [2021-08-06 14:22:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:19,115 INFO L470 AbstractCegarLoop]: Abstraction has 24906 states and 86156 transitions. [2021-08-06 14:22:19,115 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) [2021-08-06 14:22:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 24906 states and 86156 transitions. [2021-08-06 14:22:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:19,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:19,125 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:19,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:19,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:19,326 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:19,326 INFO L82 PathProgramCache]: Analyzing trace with hash 131855032, now seen corresponding path program 172 times [2021-08-06 14:22:19,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:19,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563402911] [2021-08-06 14:22:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:19,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:19,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:19,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563402911] [2021-08-06 14:22:19,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563402911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:19,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257116562] [2021-08-06 14:22:19,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:22:19,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:19,449 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:19,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-06 14:22:20,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:22:20,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:20,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:21,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257116562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:21,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:21,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:21,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88936037] [2021-08-06 14:22:21,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:21,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:21,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:21,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:21,133 INFO L87 Difference]: Start difference. First operand 24906 states and 86156 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) [2021-08-06 14:22:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:21,558 INFO L93 Difference]: Finished difference Result 25726 states and 87889 transitions. [2021-08-06 14:22:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:22:21,558 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 [2021-08-06 14:22:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:21,646 INFO L225 Difference]: With dead ends: 25726 [2021-08-06 14:22:21,646 INFO L226 Difference]: Without dead ends: 25726 [2021-08-06 14:22:21,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:22:21,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25726 states. [2021-08-06 14:22:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25726 to 24929. [2021-08-06 14:22:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24929 states, 24928 states have (on average 3.459403080872914) internal successors, (86236), 24928 states have internal predecessors, (86236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24929 states to 24929 states and 86236 transitions. [2021-08-06 14:22:22,369 INFO L78 Accepts]: Start accepts. Automaton has 24929 states and 86236 transitions. Word has length 22 [2021-08-06 14:22:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:22,369 INFO L470 AbstractCegarLoop]: Abstraction has 24929 states and 86236 transitions. [2021-08-06 14:22:22,369 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) [2021-08-06 14:22:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand 24929 states and 86236 transitions. [2021-08-06 14:22:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:22,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:22,379 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:22,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:22,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:22,580 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash -292456204, now seen corresponding path program 173 times [2021-08-06 14:22:22,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:22,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470416037] [2021-08-06 14:22:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:22,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:22,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:22,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470416037] [2021-08-06 14:22:22,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470416037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:22,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009419993] [2021-08-06 14:22:22,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:22:22,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:22,692 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:22,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-06 14:22:24,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:22:24,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:24,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:24,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:24,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009419993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:24,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:24,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:24,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268222644] [2021-08-06 14:22:24,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:24,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:24,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:24,327 INFO L87 Difference]: Start difference. First operand 24929 states and 86236 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) [2021-08-06 14:22:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:24,871 INFO L93 Difference]: Finished difference Result 25947 states and 88381 transitions. [2021-08-06 14:22:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 14:22:24,871 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 [2021-08-06 14:22:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:24,951 INFO L225 Difference]: With dead ends: 25947 [2021-08-06 14:22:24,951 INFO L226 Difference]: Without dead ends: 25947 [2021-08-06 14:22:24,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 14:22:24,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25947 states. [2021-08-06 14:22:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25947 to 24915. [2021-08-06 14:22:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24915 states, 24914 states have (on average 3.459741510797142) internal successors, (86196), 24914 states have internal predecessors, (86196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24915 states to 24915 states and 86196 transitions. [2021-08-06 14:22:25,550 INFO L78 Accepts]: Start accepts. Automaton has 24915 states and 86196 transitions. Word has length 22 [2021-08-06 14:22:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:25,550 INFO L470 AbstractCegarLoop]: Abstraction has 24915 states and 86196 transitions. [2021-08-06 14:22:25,551 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) [2021-08-06 14:22:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 24915 states and 86196 transitions. [2021-08-06 14:22:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:25,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:25,560 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:25,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-08-06 14:22:25,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-08-06 14:22:25,761 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash 314368292, now seen corresponding path program 174 times [2021-08-06 14:22:25,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:25,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131700113] [2021-08-06 14:22:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:25,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:25,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:25,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131700113] [2021-08-06 14:22:25,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131700113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:25,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640840739] [2021-08-06 14:22:25,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:22:25,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:25,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:25,880 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:25,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-06 14:22:27,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:22:27,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:27,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:27,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:22:27,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640840739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:27,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:27,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:22:27,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795443186] [2021-08-06 14:22:27,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:22:27,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:27,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:22:27,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:22:27,475 INFO L87 Difference]: Start difference. First operand 24915 states and 86196 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) [2021-08-06 14:22:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:27,794 INFO L93 Difference]: Finished difference Result 25321 states and 86916 transitions. [2021-08-06 14:22:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:22:27,794 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 [2021-08-06 14:22:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:27,990 INFO L225 Difference]: With dead ends: 25321 [2021-08-06 14:22:27,990 INFO L226 Difference]: Without dead ends: 25317 [2021-08-06 14:22:27,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:22:28,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25317 states. [2021-08-06 14:22:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25317 to 25018. [2021-08-06 14:22:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25018 states, 25017 states have (on average 3.4590078746452413) internal successors, (86534), 25017 states have internal predecessors, (86534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25018 states to 25018 states and 86534 transitions. [2021-08-06 14:22:28,525 INFO L78 Accepts]: Start accepts. Automaton has 25018 states and 86534 transitions. Word has length 22 [2021-08-06 14:22:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:28,526 INFO L470 AbstractCegarLoop]: Abstraction has 25018 states and 86534 transitions. [2021-08-06 14:22:28,526 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) [2021-08-06 14:22:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 25018 states and 86534 transitions. [2021-08-06 14:22:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:28,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:28,536 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:28,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:28,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-06 14:22:28,737 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1542503564, now seen corresponding path program 175 times [2021-08-06 14:22:28,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:28,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668209457] [2021-08-06 14:22:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:28,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:28,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:28,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668209457] [2021-08-06 14:22:28,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668209457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:28,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44074240] [2021-08-06 14:22:28,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:22:28,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:28,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:28,831 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:28,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-06 14:22:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:30,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:30,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44074240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:30,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:30,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:22:30,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139584515] [2021-08-06 14:22:30,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:22:30,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:30,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:22:30,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:22:30,450 INFO L87 Difference]: Start difference. First operand 25018 states and 86534 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) [2021-08-06 14:22:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:30,739 INFO L93 Difference]: Finished difference Result 25602 states and 87692 transitions. [2021-08-06 14:22:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:22:30,739 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 [2021-08-06 14:22:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:30,803 INFO L225 Difference]: With dead ends: 25602 [2021-08-06 14:22:30,803 INFO L226 Difference]: Without dead ends: 25602 [2021-08-06 14:22:30,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:22:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25602 states. [2021-08-06 14:22:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25602 to 25046. [2021-08-06 14:22:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25046 states, 25045 states have (on average 3.4582950688760232) internal successors, (86613), 25045 states have internal predecessors, (86613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25046 states to 25046 states and 86613 transitions. [2021-08-06 14:22:31,343 INFO L78 Accepts]: Start accepts. Automaton has 25046 states and 86613 transitions. Word has length 22 [2021-08-06 14:22:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:31,343 INFO L470 AbstractCegarLoop]: Abstraction has 25046 states and 86613 transitions. [2021-08-06 14:22:31,343 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) [2021-08-06 14:22:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 25046 states and 86613 transitions. [2021-08-06 14:22:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:31,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:31,353 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:31,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-06 14:22:31,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-06 14:22:31,553 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:31,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:31,554 INFO L82 PathProgramCache]: Analyzing trace with hash 168109744, now seen corresponding path program 176 times [2021-08-06 14:22:31,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:31,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951447243] [2021-08-06 14:22:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:31,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:31,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:31,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951447243] [2021-08-06 14:22:31,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951447243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:31,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8009187] [2021-08-06 14:22:31,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:22:31,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:31,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:31,661 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:31,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-06 14:22:33,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:22:33,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:33,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:33,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:33,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8009187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:33,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:33,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:22:33,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12646846] [2021-08-06 14:22:33,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:22:33,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:22:33,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:22:33,376 INFO L87 Difference]: Start difference. First operand 25046 states and 86613 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:33,717 INFO L93 Difference]: Finished difference Result 25784 states and 88183 transitions. [2021-08-06 14:22:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:22:33,718 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 [2021-08-06 14:22:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:33,804 INFO L225 Difference]: With dead ends: 25784 [2021-08-06 14:22:33,804 INFO L226 Difference]: Without dead ends: 25784 [2021-08-06 14:22:33,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:22:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25784 states. [2021-08-06 14:22:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25784 to 25089. [2021-08-06 14:22:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25089 states, 25088 states have (on average 3.456672512755102) internal successors, (86721), 25088 states have internal predecessors, (86721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25089 states to 25089 states and 86721 transitions. [2021-08-06 14:22:34,360 INFO L78 Accepts]: Start accepts. Automaton has 25089 states and 86721 transitions. Word has length 22 [2021-08-06 14:22:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:34,360 INFO L470 AbstractCegarLoop]: Abstraction has 25089 states and 86721 transitions. [2021-08-06 14:22:34,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 25089 states and 86721 transitions. [2021-08-06 14:22:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:34,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:34,370 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:34,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:34,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:34,571 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1657514740, now seen corresponding path program 177 times [2021-08-06 14:22:34,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:34,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128829871] [2021-08-06 14:22:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:34,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:34,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:34,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128829871] [2021-08-06 14:22:34,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128829871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:34,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928379209] [2021-08-06 14:22:34,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:22:34,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:34,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:34,666 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:34,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-06 14:22:36,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:22:36,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:36,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:36,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928379209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:36,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:36,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:22:36,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514351840] [2021-08-06 14:22:36,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:22:36,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:22:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:22:36,318 INFO L87 Difference]: Start difference. First operand 25089 states and 86721 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:36,682 INFO L93 Difference]: Finished difference Result 32766 states and 111942 transitions. [2021-08-06 14:22:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:22:36,682 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 [2021-08-06 14:22:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:36,780 INFO L225 Difference]: With dead ends: 32766 [2021-08-06 14:22:36,780 INFO L226 Difference]: Without dead ends: 32766 [2021-08-06 14:22:36,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:22:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32766 states. [2021-08-06 14:22:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32766 to 31768. [2021-08-06 14:22:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31768 states, 31767 states have (on average 3.4546542009003054) internal successors, (109744), 31767 states have internal predecessors, (109744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31768 states to 31768 states and 109744 transitions. [2021-08-06 14:22:37,505 INFO L78 Accepts]: Start accepts. Automaton has 31768 states and 109744 transitions. Word has length 22 [2021-08-06 14:22:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:37,505 INFO L470 AbstractCegarLoop]: Abstraction has 31768 states and 109744 transitions. [2021-08-06 14:22:37,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 31768 states and 109744 transitions. [2021-08-06 14:22:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:37,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:37,516 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:37,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:37,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:37,721 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash 584429360, now seen corresponding path program 178 times [2021-08-06 14:22:37,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:37,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957313235] [2021-08-06 14:22:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:37,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:22:37,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:37,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957313235] [2021-08-06 14:22:37,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957313235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:37,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497452177] [2021-08-06 14:22:37,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:22:37,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:37,948 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:37,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-06 14:22:39,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:22:39,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:39,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:39,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:22:39,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497452177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:39,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:39,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:22:39,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981229784] [2021-08-06 14:22:39,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:22:39,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:39,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:22:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:22:39,560 INFO L87 Difference]: Start difference. First operand 31768 states and 109744 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:39,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:39,808 INFO L93 Difference]: Finished difference Result 33992 states and 116356 transitions. [2021-08-06 14:22:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:22:39,808 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 [2021-08-06 14:22:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:39,914 INFO L225 Difference]: With dead ends: 33992 [2021-08-06 14:22:39,914 INFO L226 Difference]: Without dead ends: 33992 [2021-08-06 14:22:39,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:22:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33992 states. [2021-08-06 14:22:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33992 to 33636. [2021-08-06 14:22:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33636 states, 33635 states have (on average 3.4431395867400028) internal successors, (115810), 33635 states have internal predecessors, (115810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33636 states to 33636 states and 115810 transitions. [2021-08-06 14:22:40,753 INFO L78 Accepts]: Start accepts. Automaton has 33636 states and 115810 transitions. Word has length 22 [2021-08-06 14:22:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:40,753 INFO L470 AbstractCegarLoop]: Abstraction has 33636 states and 115810 transitions. [2021-08-06 14:22:40,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 33636 states and 115810 transitions. [2021-08-06 14:22:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:40,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:40,764 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:40,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2021-08-06 14:22:40,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:40,964 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1678520948, now seen corresponding path program 179 times [2021-08-06 14:22:40,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:40,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797156879] [2021-08-06 14:22:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:40,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:41,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:41,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797156879] [2021-08-06 14:22:41,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797156879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:41,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014089756] [2021-08-06 14:22:41,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:22:41,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:41,071 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:41,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-06 14:22:42,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:22:42,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:42,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014089756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:42,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:42,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:42,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906986855] [2021-08-06 14:22:42,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:42,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:42,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:42,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:42,904 INFO L87 Difference]: Start difference. First operand 33636 states and 115810 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) [2021-08-06 14:22:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:43,270 INFO L93 Difference]: Finished difference Result 34160 states and 116755 transitions. [2021-08-06 14:22:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:22:43,271 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 [2021-08-06 14:22:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:43,378 INFO L225 Difference]: With dead ends: 34160 [2021-08-06 14:22:43,378 INFO L226 Difference]: Without dead ends: 34160 [2021-08-06 14:22:43,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:22:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34160 states. [2021-08-06 14:22:44,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34160 to 33646. [2021-08-06 14:22:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33646 states, 33645 states have (on average 3.4425026006836084) internal successors, (115823), 33645 states have internal predecessors, (115823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33646 states to 33646 states and 115823 transitions. [2021-08-06 14:22:44,225 INFO L78 Accepts]: Start accepts. Automaton has 33646 states and 115823 transitions. Word has length 22 [2021-08-06 14:22:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:44,225 INFO L470 AbstractCegarLoop]: Abstraction has 33646 states and 115823 transitions. [2021-08-06 14:22:44,225 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) [2021-08-06 14:22:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 33646 states and 115823 transitions. [2021-08-06 14:22:44,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:44,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:44,236 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:44,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-06 14:22:44,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:44,437 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1235621808, now seen corresponding path program 180 times [2021-08-06 14:22:44,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:44,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130858242] [2021-08-06 14:22:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:44,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:44,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:44,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130858242] [2021-08-06 14:22:44,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130858242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:44,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709772223] [2021-08-06 14:22:44,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:22:44,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:44,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:44,712 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:44,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-06 14:22:46,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:22:46,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:46,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709772223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:46,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:46,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:46,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83185976] [2021-08-06 14:22:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:46,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:46,333 INFO L87 Difference]: Start difference. First operand 33646 states and 115823 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) [2021-08-06 14:22:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:46,655 INFO L93 Difference]: Finished difference Result 34492 states and 117933 transitions. [2021-08-06 14:22:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:22:46,655 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 [2021-08-06 14:22:46,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:46,768 INFO L225 Difference]: With dead ends: 34492 [2021-08-06 14:22:46,768 INFO L226 Difference]: Without dead ends: 34492 [2021-08-06 14:22:46,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 318.9ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:22:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34492 states. [2021-08-06 14:22:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34492 to 34149. [2021-08-06 14:22:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34149 states, 34148 states have (on average 3.436980203818672) internal successors, (117366), 34148 states have internal predecessors, (117366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34149 states to 34149 states and 117366 transitions. [2021-08-06 14:22:47,535 INFO L78 Accepts]: Start accepts. Automaton has 34149 states and 117366 transitions. Word has length 22 [2021-08-06 14:22:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:47,536 INFO L470 AbstractCegarLoop]: Abstraction has 34149 states and 117366 transitions. [2021-08-06 14:22:47,536 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) [2021-08-06 14:22:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 34149 states and 117366 transitions. [2021-08-06 14:22:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:47,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:47,546 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:47,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-08-06 14:22:47,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-06 14:22:47,747 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:47,747 INFO L82 PathProgramCache]: Analyzing trace with hash 390650356, now seen corresponding path program 181 times [2021-08-06 14:22:47,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:47,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005814477] [2021-08-06 14:22:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:47,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:48,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:48,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005814477] [2021-08-06 14:22:48,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005814477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:48,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740034113] [2021-08-06 14:22:48,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:22:48,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:48,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:48,006 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:48,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-06 14:22:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:49,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740034113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:49,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:49,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:49,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531046044] [2021-08-06 14:22:49,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:49,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:49,634 INFO L87 Difference]: Start difference. First operand 34149 states and 117366 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) [2021-08-06 14:22:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:50,008 INFO L93 Difference]: Finished difference Result 34789 states and 118786 transitions. [2021-08-06 14:22:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:22:50,009 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 [2021-08-06 14:22:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:50,105 INFO L225 Difference]: With dead ends: 34789 [2021-08-06 14:22:50,105 INFO L226 Difference]: Without dead ends: 34789 [2021-08-06 14:22:50,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:22:50,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34789 states. [2021-08-06 14:22:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34789 to 34413. [2021-08-06 14:22:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34413 states, 34412 states have (on average 3.4337731024061373) internal successors, (118163), 34412 states have internal predecessors, (118163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34413 states to 34413 states and 118163 transitions. [2021-08-06 14:22:51,147 INFO L78 Accepts]: Start accepts. Automaton has 34413 states and 118163 transitions. Word has length 22 [2021-08-06 14:22:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:51,147 INFO L470 AbstractCegarLoop]: Abstraction has 34413 states and 118163 transitions. [2021-08-06 14:22:51,147 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) [2021-08-06 14:22:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 34413 states and 118163 transitions. [2021-08-06 14:22:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:51,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:51,158 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:51,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-06 14:22:51,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:51,359 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash -33660880, now seen corresponding path program 182 times [2021-08-06 14:22:51,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:51,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597183264] [2021-08-06 14:22:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:51,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:51,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:51,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597183264] [2021-08-06 14:22:51,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597183264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:51,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318313216] [2021-08-06 14:22:51,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:22:51,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:51,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:51,475 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:51,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-06 14:22:53,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:22:53,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:53,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:53,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318313216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:53,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:53,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:53,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799385074] [2021-08-06 14:22:53,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:53,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:53,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:53,221 INFO L87 Difference]: Start difference. First operand 34413 states and 118163 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) [2021-08-06 14:22:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:53,824 INFO L93 Difference]: Finished difference Result 35038 states and 119408 transitions. [2021-08-06 14:22:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:22:53,825 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 [2021-08-06 14:22:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:53,911 INFO L225 Difference]: With dead ends: 35038 [2021-08-06 14:22:53,911 INFO L226 Difference]: Without dead ends: 35038 [2021-08-06 14:22:53,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 323.0ms TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 14:22:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35038 states. [2021-08-06 14:22:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35038 to 34515. [2021-08-06 14:22:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34515 states, 34514 states have (on average 3.432491163006316) internal successors, (118469), 34514 states have internal predecessors, (118469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34515 states to 34515 states and 118469 transitions. [2021-08-06 14:22:54,710 INFO L78 Accepts]: Start accepts. Automaton has 34515 states and 118469 transitions. Word has length 22 [2021-08-06 14:22:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:54,710 INFO L470 AbstractCegarLoop]: Abstraction has 34515 states and 118469 transitions. [2021-08-06 14:22:54,710 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) [2021-08-06 14:22:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 34515 states and 118469 transitions. [2021-08-06 14:22:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:54,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:54,721 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:54,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-06 14:22:54,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:54,921 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash -302407308, now seen corresponding path program 183 times [2021-08-06 14:22:54,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:54,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102682775] [2021-08-06 14:22:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:54,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:55,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:55,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102682775] [2021-08-06 14:22:55,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102682775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:55,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352893323] [2021-08-06 14:22:55,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:22:55,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:55,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:55,046 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:55,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-06 14:22:56,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:22:56,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:22:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:22:56,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:22:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:56,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352893323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:56,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:22:56,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:22:56,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547331636] [2021-08-06 14:22:56,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:22:56,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:22:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:22:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:22:56,818 INFO L87 Difference]: Start difference. First operand 34515 states and 118469 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) [2021-08-06 14:22:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:22:57,528 INFO L93 Difference]: Finished difference Result 35498 states and 120694 transitions. [2021-08-06 14:22:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 14:22:57,528 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 [2021-08-06 14:22:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:22:57,654 INFO L225 Difference]: With dead ends: 35498 [2021-08-06 14:22:57,654 INFO L226 Difference]: Without dead ends: 35498 [2021-08-06 14:22:57,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=778, Invalid=1574, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 14:22:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35498 states. [2021-08-06 14:22:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35498 to 34626. [2021-08-06 14:22:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34626 states, 34625 states have (on average 3.431104693140794) internal successors, (118802), 34625 states have internal predecessors, (118802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:22:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34626 states to 34626 states and 118802 transitions. [2021-08-06 14:22:58,511 INFO L78 Accepts]: Start accepts. Automaton has 34626 states and 118802 transitions. Word has length 22 [2021-08-06 14:22:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:22:58,511 INFO L470 AbstractCegarLoop]: Abstraction has 34626 states and 118802 transitions. [2021-08-06 14:22:58,511 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) [2021-08-06 14:22:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 34626 states and 118802 transitions. [2021-08-06 14:22:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:22:58,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:22:58,524 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:22:58,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-06 14:22:58,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:58,724 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:22:58,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:22:58,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1848745904, now seen corresponding path program 184 times [2021-08-06 14:22:58,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:22:58,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775334709] [2021-08-06 14:22:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:22:58,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:22:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:22:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:22:58,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:22:58,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775334709] [2021-08-06 14:22:58,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775334709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:22:58,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443959305] [2021-08-06 14:22:58,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:22:58,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:22:58,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:22:58,986 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:22:58,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-06 14:23:00,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:00,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:00,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:00,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:23:00,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443959305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:00,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:00,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:23:00,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880190889] [2021-08-06 14:23:00,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:23:00,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:00,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:23:00,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:23:00,647 INFO L87 Difference]: Start difference. First operand 34626 states and 118802 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) [2021-08-06 14:23:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:01,056 INFO L93 Difference]: Finished difference Result 35011 states and 119398 transitions. [2021-08-06 14:23:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:23:01,056 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 [2021-08-06 14:23:01,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:01,213 INFO L225 Difference]: With dead ends: 35011 [2021-08-06 14:23:01,213 INFO L226 Difference]: Without dead ends: 35007 [2021-08-06 14:23:01,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:23:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35007 states. [2021-08-06 14:23:02,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35007 to 33849. [2021-08-06 14:23:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33849 states, 33848 states have (on average 3.426229023871425) internal successors, (115971), 33848 states have internal predecessors, (115971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33849 states to 33849 states and 115971 transitions. [2021-08-06 14:23:02,222 INFO L78 Accepts]: Start accepts. Automaton has 33849 states and 115971 transitions. Word has length 22 [2021-08-06 14:23:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:02,222 INFO L470 AbstractCegarLoop]: Abstraction has 33849 states and 115971 transitions. [2021-08-06 14:23:02,222 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) [2021-08-06 14:23:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33849 states and 115971 transitions. [2021-08-06 14:23:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:02,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:02,234 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:02,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:02,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:02,435 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:02,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1264087344, now seen corresponding path program 185 times [2021-08-06 14:23:02,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:02,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735342455] [2021-08-06 14:23:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:02,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:02,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:02,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735342455] [2021-08-06 14:23:02,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735342455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:02,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226748708] [2021-08-06 14:23:02,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:02,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:02,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:02,543 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:02,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-06 14:23:04,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:23:04,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:04,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226748708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:04,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:04,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:23:04,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960059900] [2021-08-06 14:23:04,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:23:04,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:23:04,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:23:04,252 INFO L87 Difference]: Start difference. First operand 33849 states and 115971 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:04,820 INFO L93 Difference]: Finished difference Result 42320 states and 142026 transitions. [2021-08-06 14:23:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:23:04,820 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 [2021-08-06 14:23:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:04,953 INFO L225 Difference]: With dead ends: 42320 [2021-08-06 14:23:04,953 INFO L226 Difference]: Without dead ends: 42320 [2021-08-06 14:23:04,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=452, Invalid=880, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:23:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42320 states. [2021-08-06 14:23:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42320 to 39983. [2021-08-06 14:23:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39983 states, 39982 states have (on average 3.403156420389175) internal successors, (136065), 39982 states have internal predecessors, (136065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39983 states to 39983 states and 136065 transitions. [2021-08-06 14:23:05,956 INFO L78 Accepts]: Start accepts. Automaton has 39983 states and 136065 transitions. Word has length 22 [2021-08-06 14:23:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:05,956 INFO L470 AbstractCegarLoop]: Abstraction has 39983 states and 136065 transitions. [2021-08-06 14:23:05,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 39983 states and 136065 transitions. [2021-08-06 14:23:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:05,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:05,969 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:05,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:06,169 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 [2021-08-06 14:23:06,170 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash 839776108, now seen corresponding path program 186 times [2021-08-06 14:23:06,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:06,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975998149] [2021-08-06 14:23:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:06,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:06,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:06,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975998149] [2021-08-06 14:23:06,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975998149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:06,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610183547] [2021-08-06 14:23:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:23:06,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:06,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:06,454 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:06,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-06 14:23:08,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:23:08,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:08,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:08,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610183547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:08,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:08,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:23:08,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808423693] [2021-08-06 14:23:08,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:23:08,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:08,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:23:08,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:08,192 INFO L87 Difference]: Start difference. First operand 39983 states and 136065 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) [2021-08-06 14:23:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:08,679 INFO L93 Difference]: Finished difference Result 47585 states and 159538 transitions. [2021-08-06 14:23:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:23:08,680 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 [2021-08-06 14:23:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:08,959 INFO L225 Difference]: With dead ends: 47585 [2021-08-06 14:23:08,960 INFO L226 Difference]: Without dead ends: 47585 [2021-08-06 14:23:08,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=461, Invalid=871, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:23:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47585 states. [2021-08-06 14:23:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47585 to 35328. [2021-08-06 14:23:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35328 states, 35327 states have (on average 3.3998641265887284) internal successors, (120107), 35327 states have internal predecessors, (120107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35328 states to 35328 states and 120107 transitions. [2021-08-06 14:23:09,903 INFO L78 Accepts]: Start accepts. Automaton has 35328 states and 120107 transitions. Word has length 22 [2021-08-06 14:23:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:09,903 INFO L470 AbstractCegarLoop]: Abstraction has 35328 states and 120107 transitions. [2021-08-06 14:23:09,903 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) [2021-08-06 14:23:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 35328 states and 120107 transitions. [2021-08-06 14:23:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:09,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:09,918 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:09,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2021-08-06 14:23:10,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-06 14:23:10,118 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash -5195344, now seen corresponding path program 187 times [2021-08-06 14:23:10,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:10,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576410981] [2021-08-06 14:23:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:10,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:10,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:10,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576410981] [2021-08-06 14:23:10,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576410981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:10,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121813713] [2021-08-06 14:23:10,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:23:10,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:10,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:10,225 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:10,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-06 14:23:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:11,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:11,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:12,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121813713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:12,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:12,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:23:12,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554789832] [2021-08-06 14:23:12,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:23:12,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:12,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:23:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:12,115 INFO L87 Difference]: Start difference. First operand 35328 states and 120107 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) [2021-08-06 14:23:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:12,684 INFO L93 Difference]: Finished difference Result 40413 states and 135143 transitions. [2021-08-06 14:23:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:23:12,685 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 [2021-08-06 14:23:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:12,808 INFO L225 Difference]: With dead ends: 40413 [2021-08-06 14:23:12,808 INFO L226 Difference]: Without dead ends: 40413 [2021-08-06 14:23:12,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=641, Invalid=1251, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:23:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40413 states. [2021-08-06 14:23:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40413 to 35338. [2021-08-06 14:23:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.4020997820980843) internal successors, (120220), 35337 states have internal predecessors, (120220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 120220 transitions. [2021-08-06 14:23:13,871 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 120220 transitions. Word has length 22 [2021-08-06 14:23:13,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:13,871 INFO L470 AbstractCegarLoop]: Abstraction has 35338 states and 120220 transitions. [2021-08-06 14:23:13,871 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) [2021-08-06 14:23:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 120220 transitions. [2021-08-06 14:23:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:13,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:13,885 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:13,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:14,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-06 14:23:14,089 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:14,089 INFO L82 PathProgramCache]: Analyzing trace with hash 571029680, now seen corresponding path program 188 times [2021-08-06 14:23:14,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:14,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920332838] [2021-08-06 14:23:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:14,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:14,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:14,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920332838] [2021-08-06 14:23:14,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920332838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:14,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606481718] [2021-08-06 14:23:14,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:14,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:14,208 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:14,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-06 14:23:15,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:15,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:15,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:15,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:15,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606481718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:15,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:15,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:23:15,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762488424] [2021-08-06 14:23:15,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:23:15,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:15,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:23:15,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:15,945 INFO L87 Difference]: Start difference. First operand 35338 states and 120220 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) [2021-08-06 14:23:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:16,447 INFO L93 Difference]: Finished difference Result 37531 states and 126371 transitions. [2021-08-06 14:23:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:23:16,447 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 [2021-08-06 14:23:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:16,548 INFO L225 Difference]: With dead ends: 37531 [2021-08-06 14:23:16,548 INFO L226 Difference]: Without dead ends: 37531 [2021-08-06 14:23:16,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:23:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37531 states. [2021-08-06 14:23:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37531 to 35002. [2021-08-06 14:23:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35002 states, 35001 states have (on average 3.407531213393903) internal successors, (119267), 35001 states have internal predecessors, (119267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35002 states to 35002 states and 119267 transitions. [2021-08-06 14:23:17,383 INFO L78 Accepts]: Start accepts. Automaton has 35002 states and 119267 transitions. Word has length 22 [2021-08-06 14:23:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:17,383 INFO L470 AbstractCegarLoop]: Abstraction has 35002 states and 119267 transitions. [2021-08-06 14:23:17,383 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) [2021-08-06 14:23:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 35002 states and 119267 transitions. [2021-08-06 14:23:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:17,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:17,396 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:17,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-08-06 14:23:17,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:17,597 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:17,597 INFO L82 PathProgramCache]: Analyzing trace with hash -273941772, now seen corresponding path program 189 times [2021-08-06 14:23:17,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:17,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904807661] [2021-08-06 14:23:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:17,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:17,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:17,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904807661] [2021-08-06 14:23:17,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904807661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:17,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211541942] [2021-08-06 14:23:17,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:17,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:17,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:17,709 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:17,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-06 14:23:19,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:23:19,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:19,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:19,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211541942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:19,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:19,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:23:19,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60220573] [2021-08-06 14:23:19,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:23:19,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:19,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:23:19,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:19,572 INFO L87 Difference]: Start difference. First operand 35002 states and 119267 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) [2021-08-06 14:23:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:20,067 INFO L93 Difference]: Finished difference Result 36543 states and 123234 transitions. [2021-08-06 14:23:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:23:20,068 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 [2021-08-06 14:23:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:20,181 INFO L225 Difference]: With dead ends: 36543 [2021-08-06 14:23:20,181 INFO L226 Difference]: Without dead ends: 36543 [2021-08-06 14:23:20,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=517, Invalid=1043, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:23:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36543 states. [2021-08-06 14:23:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36543 to 35094. [2021-08-06 14:23:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35094 states, 35093 states have (on average 3.40811557860542) internal successors, (119601), 35093 states have internal predecessors, (119601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35094 states to 35094 states and 119601 transitions. [2021-08-06 14:23:21,214 INFO L78 Accepts]: Start accepts. Automaton has 35094 states and 119601 transitions. Word has length 22 [2021-08-06 14:23:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:21,214 INFO L470 AbstractCegarLoop]: Abstraction has 35094 states and 119601 transitions. [2021-08-06 14:23:21,214 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) [2021-08-06 14:23:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 35094 states and 119601 transitions. [2021-08-06 14:23:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:21,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:21,228 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:21,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-08-06 14:23:21,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:21,428 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash -698253008, now seen corresponding path program 190 times [2021-08-06 14:23:21,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:21,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996595415] [2021-08-06 14:23:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:21,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:21,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:21,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996595415] [2021-08-06 14:23:21,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996595415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:21,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760251685] [2021-08-06 14:23:21,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:21,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:21,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:21,546 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:21,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-06 14:23:23,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:23,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:23,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:23,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760251685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:23,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:23,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:23:23,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911153320] [2021-08-06 14:23:23,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:23:23,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:23,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:23:23,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:23,298 INFO L87 Difference]: Start difference. First operand 35094 states and 119601 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) [2021-08-06 14:23:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:23,934 INFO L93 Difference]: Finished difference Result 36779 states and 123751 transitions. [2021-08-06 14:23:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 14:23:23,934 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 [2021-08-06 14:23:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:24,039 INFO L225 Difference]: With dead ends: 36779 [2021-08-06 14:23:24,039 INFO L226 Difference]: Without dead ends: 36779 [2021-08-06 14:23:24,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=752, Invalid=1504, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 14:23:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36779 states. [2021-08-06 14:23:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36779 to 35062. [2021-08-06 14:23:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35062 states, 35061 states have (on average 3.408659193976213) internal successors, (119511), 35061 states have internal predecessors, (119511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35062 states to 35062 states and 119511 transitions. [2021-08-06 14:23:24,876 INFO L78 Accepts]: Start accepts. Automaton has 35062 states and 119511 transitions. Word has length 22 [2021-08-06 14:23:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:24,877 INFO L470 AbstractCegarLoop]: Abstraction has 35062 states and 119511 transitions. [2021-08-06 14:23:24,877 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) [2021-08-06 14:23:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 35062 states and 119511 transitions. [2021-08-06 14:23:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:24,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:24,892 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:24,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-06 14:23:25,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:25,092 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:25,093 INFO L82 PathProgramCache]: Analyzing trace with hash 829825004, now seen corresponding path program 191 times [2021-08-06 14:23:25,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:25,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544876376] [2021-08-06 14:23:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:25,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:25,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:25,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544876376] [2021-08-06 14:23:25,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544876376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:25,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432367856] [2021-08-06 14:23:25,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:25,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:25,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:25,195 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:25,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-06 14:23:26,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:23:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:26,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:27,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432367856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:27,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:27,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:23:27,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901264572] [2021-08-06 14:23:27,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:23:27,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:27,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:23:27,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:27,061 INFO L87 Difference]: Start difference. First operand 35062 states and 119511 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) [2021-08-06 14:23:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:27,437 INFO L93 Difference]: Finished difference Result 35939 states and 121542 transitions. [2021-08-06 14:23:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:23:27,437 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 [2021-08-06 14:23:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:27,548 INFO L225 Difference]: With dead ends: 35939 [2021-08-06 14:23:27,549 INFO L226 Difference]: Without dead ends: 35939 [2021-08-06 14:23:27,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:23:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35939 states. [2021-08-06 14:23:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35939 to 35019. [2021-08-06 14:23:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35019 states, 35018 states have (on average 3.409617910788737) internal successors, (119398), 35018 states have internal predecessors, (119398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35019 states to 35019 states and 119398 transitions. [2021-08-06 14:23:28,550 INFO L78 Accepts]: Start accepts. Automaton has 35019 states and 119398 transitions. Word has length 22 [2021-08-06 14:23:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:28,550 INFO L470 AbstractCegarLoop]: Abstraction has 35019 states and 119398 transitions. [2021-08-06 14:23:28,550 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) [2021-08-06 14:23:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 35019 states and 119398 transitions. [2021-08-06 14:23:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:28,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:28,562 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:28,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-08-06 14:23:28,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:28,762 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:28,763 INFO L82 PathProgramCache]: Analyzing trace with hash -15146448, now seen corresponding path program 192 times [2021-08-06 14:23:28,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:28,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259119092] [2021-08-06 14:23:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:28,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:28,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:28,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259119092] [2021-08-06 14:23:28,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259119092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:28,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218424203] [2021-08-06 14:23:28,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:23:28,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:28,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:28,870 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:28,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-06 14:23:30,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:23:30,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:30,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:30,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:30,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218424203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:30,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:30,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:23:30,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824264496] [2021-08-06 14:23:30,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:23:30,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:30,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:23:30,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:30,624 INFO L87 Difference]: Start difference. First operand 35019 states and 119398 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) [2021-08-06 14:23:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:31,108 INFO L93 Difference]: Finished difference Result 35660 states and 120776 transitions. [2021-08-06 14:23:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:23:31,109 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 [2021-08-06 14:23:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:31,211 INFO L225 Difference]: With dead ends: 35660 [2021-08-06 14:23:31,211 INFO L226 Difference]: Without dead ends: 35660 [2021-08-06 14:23:31,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:23:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35660 states. [2021-08-06 14:23:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35660 to 35012. [2021-08-06 14:23:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35012 states, 35011 states have (on average 3.4097854959869753) internal successors, (119380), 35011 states have internal predecessors, (119380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35012 states to 35012 states and 119380 transitions. [2021-08-06 14:23:32,019 INFO L78 Accepts]: Start accepts. Automaton has 35012 states and 119380 transitions. Word has length 22 [2021-08-06 14:23:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:32,019 INFO L470 AbstractCegarLoop]: Abstraction has 35012 states and 119380 transitions. [2021-08-06 14:23:32,019 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) [2021-08-06 14:23:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 35012 states and 119380 transitions. [2021-08-06 14:23:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:32,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:32,031 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:32,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2021-08-06 14:23:32,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:32,232 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:32,232 INFO L82 PathProgramCache]: Analyzing trace with hash -439457684, now seen corresponding path program 193 times [2021-08-06 14:23:32,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:32,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760631439] [2021-08-06 14:23:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:32,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:32,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760631439] [2021-08-06 14:23:32,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760631439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374059551] [2021-08-06 14:23:32,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:23:32,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:32,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:32,345 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:32,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-06 14:23:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:34,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:34,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:34,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374059551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:34,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:34,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:23:34,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597642827] [2021-08-06 14:23:34,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:23:34,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:23:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:34,165 INFO L87 Difference]: Start difference. First operand 35012 states and 119380 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) [2021-08-06 14:23:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:34,781 INFO L93 Difference]: Finished difference Result 35589 states and 120542 transitions. [2021-08-06 14:23:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:23:34,782 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 [2021-08-06 14:23:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:34,884 INFO L225 Difference]: With dead ends: 35589 [2021-08-06 14:23:34,884 INFO L226 Difference]: Without dead ends: 35589 [2021-08-06 14:23:34,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=592, Invalid=1214, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 14:23:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35589 states. [2021-08-06 14:23:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35589 to 34996. [2021-08-06 14:23:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34996 states, 34995 states have (on average 3.409972853264752) internal successors, (119332), 34995 states have internal predecessors, (119332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34996 states to 34996 states and 119332 transitions. [2021-08-06 14:23:35,711 INFO L78 Accepts]: Start accepts. Automaton has 34996 states and 119332 transitions. Word has length 22 [2021-08-06 14:23:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:35,711 INFO L470 AbstractCegarLoop]: Abstraction has 34996 states and 119332 transitions. [2021-08-06 14:23:35,711 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) [2021-08-06 14:23:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34996 states and 119332 transitions. [2021-08-06 14:23:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:35,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:35,723 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:35,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:35,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:35,924 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash -708204112, now seen corresponding path program 194 times [2021-08-06 14:23:35,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:35,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725101651] [2021-08-06 14:23:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:35,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:36,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:36,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725101651] [2021-08-06 14:23:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725101651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:36,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378072168] [2021-08-06 14:23:36,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:36,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:36,234 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:36,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-06 14:23:37,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:37,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:37,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:37,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:37,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378072168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:37,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:37,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:23:37,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270327339] [2021-08-06 14:23:37,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:23:37,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:23:37,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:37,980 INFO L87 Difference]: Start difference. First operand 34996 states and 119332 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) [2021-08-06 14:23:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:38,560 INFO L93 Difference]: Finished difference Result 35854 states and 121247 transitions. [2021-08-06 14:23:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 14:23:38,561 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 [2021-08-06 14:23:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:38,665 INFO L225 Difference]: With dead ends: 35854 [2021-08-06 14:23:38,665 INFO L226 Difference]: Without dead ends: 35854 [2021-08-06 14:23:38,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=777, Invalid=1575, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 14:23:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35854 states. [2021-08-06 14:23:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35854 to 34992. [2021-08-06 14:23:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34992 states, 34991 states have (on average 3.410019719356406) internal successors, (119320), 34991 states have internal predecessors, (119320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34992 states to 34992 states and 119320 transitions. [2021-08-06 14:23:39,522 INFO L78 Accepts]: Start accepts. Automaton has 34992 states and 119320 transitions. Word has length 22 [2021-08-06 14:23:39,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:39,523 INFO L470 AbstractCegarLoop]: Abstraction has 34992 states and 119320 transitions. [2021-08-06 14:23:39,523 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) [2021-08-06 14:23:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 34992 states and 119320 transitions. [2021-08-06 14:23:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:39,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:39,534 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:39,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-08-06 14:23:39,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:39,735 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:39,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:39,735 INFO L82 PathProgramCache]: Analyzing trace with hash -658708060, now seen corresponding path program 195 times [2021-08-06 14:23:39,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:39,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395203179] [2021-08-06 14:23:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:39,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:39,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:39,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395203179] [2021-08-06 14:23:39,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395203179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:39,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429309151] [2021-08-06 14:23:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:39,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:39,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:39,832 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:39,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-06 14:23:41,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:23:41,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:41,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:41,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:23:41,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429309151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:41,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:41,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:23:41,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657580914] [2021-08-06 14:23:41,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:23:41,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:41,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:23:41,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:23:41,634 INFO L87 Difference]: Start difference. First operand 34992 states and 119320 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) [2021-08-06 14:23:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:42,055 INFO L93 Difference]: Finished difference Result 36356 states and 123273 transitions. [2021-08-06 14:23:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:23:42,056 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 [2021-08-06 14:23:42,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:42,157 INFO L225 Difference]: With dead ends: 36356 [2021-08-06 14:23:42,157 INFO L226 Difference]: Without dead ends: 36352 [2021-08-06 14:23:42,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:23:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36352 states. [2021-08-06 14:23:42,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36352 to 36066. [2021-08-06 14:23:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36066 states, 36065 states have (on average 3.408512408151948) internal successors, (122928), 36065 states have internal predecessors, (122928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36066 states to 36066 states and 122928 transitions. [2021-08-06 14:23:42,989 INFO L78 Accepts]: Start accepts. Automaton has 36066 states and 122928 transitions. Word has length 22 [2021-08-06 14:23:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:42,989 INFO L470 AbstractCegarLoop]: Abstraction has 36066 states and 122928 transitions. [2021-08-06 14:23:42,989 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) [2021-08-06 14:23:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 36066 states and 122928 transitions. [2021-08-06 14:23:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:43,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:43,001 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:43,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-08-06 14:23:43,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:43,201 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:43,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1779387380, now seen corresponding path program 196 times [2021-08-06 14:23:43,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:43,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579757033] [2021-08-06 14:23:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:43,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:43,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:43,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579757033] [2021-08-06 14:23:43,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579757033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:43,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856215214] [2021-08-06 14:23:43,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:43,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:43,300 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:43,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-06 14:23:45,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:45,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:45,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856215214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:45,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:45,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:23:45,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434646139] [2021-08-06 14:23:45,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:23:45,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:45,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:23:45,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:23:45,231 INFO L87 Difference]: Start difference. First operand 36066 states and 122928 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) [2021-08-06 14:23:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:45,509 INFO L93 Difference]: Finished difference Result 36770 states and 124459 transitions. [2021-08-06 14:23:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:23:45,510 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 [2021-08-06 14:23:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:45,614 INFO L225 Difference]: With dead ends: 36770 [2021-08-06 14:23:45,615 INFO L226 Difference]: Without dead ends: 36770 [2021-08-06 14:23:45,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:23:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36770 states. [2021-08-06 14:23:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36770 to 36082. [2021-08-06 14:23:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36082 states, 36081 states have (on average 3.408192677586541) internal successors, (122971), 36081 states have internal predecessors, (122971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36082 states to 36082 states and 122971 transitions. [2021-08-06 14:23:46,599 INFO L78 Accepts]: Start accepts. Automaton has 36082 states and 122971 transitions. Word has length 22 [2021-08-06 14:23:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:46,599 INFO L470 AbstractCegarLoop]: Abstraction has 36082 states and 122971 transitions. [2021-08-06 14:23:46,599 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) [2021-08-06 14:23:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 36082 states and 122971 transitions. [2021-08-06 14:23:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:46,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:46,612 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:46,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2021-08-06 14:23:46,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-06 14:23:46,812 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash -804966608, now seen corresponding path program 197 times [2021-08-06 14:23:46,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:46,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127728780] [2021-08-06 14:23:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:46,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:46,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127728780] [2021-08-06 14:23:46,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127728780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:46,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715583222] [2021-08-06 14:23:46,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:46,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:46,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:46,907 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:46,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-06 14:23:48,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:23:48,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:48,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:48,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715583222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:48,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:48,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:23:48,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83644274] [2021-08-06 14:23:48,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:23:48,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:48,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:23:48,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:23:48,689 INFO L87 Difference]: Start difference. First operand 36082 states and 122971 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:48,989 INFO L93 Difference]: Finished difference Result 37134 states and 125490 transitions. [2021-08-06 14:23:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:23:48,990 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 [2021-08-06 14:23:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:49,198 INFO L225 Difference]: With dead ends: 37134 [2021-08-06 14:23:49,198 INFO L226 Difference]: Without dead ends: 37134 [2021-08-06 14:23:49,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:23:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37134 states. [2021-08-06 14:23:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37134 to 36189. [2021-08-06 14:23:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36189 states, 36188 states have (on average 3.406792306842047) internal successors, (123285), 36188 states have internal predecessors, (123285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36189 states to 36189 states and 123285 transitions. [2021-08-06 14:23:49,998 INFO L78 Accepts]: Start accepts. Automaton has 36189 states and 123285 transitions. Word has length 22 [2021-08-06 14:23:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:49,998 INFO L470 AbstractCegarLoop]: Abstraction has 36189 states and 123285 transitions. [2021-08-06 14:23:49,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 36189 states and 123285 transitions. [2021-08-06 14:23:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:50,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:50,010 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:50,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-06 14:23:50,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-06 14:23:50,211 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash 684438388, now seen corresponding path program 198 times [2021-08-06 14:23:50,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:50,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392776720] [2021-08-06 14:23:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:50,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:50,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:50,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392776720] [2021-08-06 14:23:50,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392776720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:50,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043959206] [2021-08-06 14:23:50,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:23:50,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:50,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:50,306 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:50,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-06 14:23:52,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:23:52,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:52,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:52,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:52,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043959206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:52,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:52,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:23:52,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482267094] [2021-08-06 14:23:52,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:23:52,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:23:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:23:52,185 INFO L87 Difference]: Start difference. First operand 36189 states and 123285 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:52,616 INFO L93 Difference]: Finished difference Result 45716 states and 154442 transitions. [2021-08-06 14:23:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:23:52,616 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 [2021-08-06 14:23:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:52,754 INFO L225 Difference]: With dead ends: 45716 [2021-08-06 14:23:52,755 INFO L226 Difference]: Without dead ends: 45716 [2021-08-06 14:23:52,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=221, Invalid=379, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:23:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45716 states. [2021-08-06 14:23:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45716 to 41078. [2021-08-06 14:23:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41078 states, 41077 states have (on average 3.405944932687392) internal successors, (139906), 41077 states have internal predecessors, (139906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41078 states to 41078 states and 139906 transitions. [2021-08-06 14:23:53,924 INFO L78 Accepts]: Start accepts. Automaton has 41078 states and 139906 transitions. Word has length 22 [2021-08-06 14:23:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:53,924 INFO L470 AbstractCegarLoop]: Abstraction has 41078 states and 139906 transitions. [2021-08-06 14:23:53,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 41078 states and 139906 transitions. [2021-08-06 14:23:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:53,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:53,935 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:53,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-06 14:23:54,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-06 14:23:54,136 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash -388646992, now seen corresponding path program 199 times [2021-08-06 14:23:54,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:54,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382235107] [2021-08-06 14:23:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:54,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:54,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:54,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382235107] [2021-08-06 14:23:54,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382235107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:54,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181228148] [2021-08-06 14:23:54,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:23:54,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:54,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:54,233 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:54,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-06 14:23:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:55,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:55,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:56,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181228148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:56,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:56,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:23:56,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934924107] [2021-08-06 14:23:56,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:23:56,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:56,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:23:56,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:23:56,088 INFO L87 Difference]: Start difference. First operand 41078 states and 139906 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:56,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:56,489 INFO L93 Difference]: Finished difference Result 44653 states and 150641 transitions. [2021-08-06 14:23:56,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:23:56,490 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 [2021-08-06 14:23:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:56,624 INFO L225 Difference]: With dead ends: 44653 [2021-08-06 14:23:56,625 INFO L226 Difference]: Without dead ends: 44653 [2021-08-06 14:23:56,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:23:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44653 states. [2021-08-06 14:23:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44653 to 44067. [2021-08-06 14:23:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44067 states, 44066 states have (on average 3.393409885172242) internal successors, (149534), 44066 states have internal predecessors, (149534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44067 states to 44067 states and 149534 transitions. [2021-08-06 14:23:57,881 INFO L78 Accepts]: Start accepts. Automaton has 44067 states and 149534 transitions. Word has length 22 [2021-08-06 14:23:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:57,881 INFO L470 AbstractCegarLoop]: Abstraction has 44067 states and 149534 transitions. [2021-08-06 14:23:57,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:57,882 INFO L276 IsEmpty]: Start isEmpty. Operand 44067 states and 149534 transitions. [2021-08-06 14:23:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:23:57,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:57,894 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:57,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:58,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-06 14:23:58,094 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:58,095 INFO L82 PathProgramCache]: Analyzing trace with hash 705444596, now seen corresponding path program 200 times [2021-08-06 14:23:58,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:58,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722483842] [2021-08-06 14:23:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:58,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:23:58,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:58,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722483842] [2021-08-06 14:23:58,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722483842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:58,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042163677] [2021-08-06 14:23:58,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:58,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:58,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:58,197 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:58,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-06 14:23:59,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:59,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:23:59,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:24:00,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042163677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:00,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:00,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:24:00,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776943110] [2021-08-06 14:24:00,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:24:00,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:24:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:00,050 INFO L87 Difference]: Start difference. First operand 44067 states and 149534 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:00,456 INFO L93 Difference]: Finished difference Result 44737 states and 151198 transitions. [2021-08-06 14:24:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:24:00,457 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 [2021-08-06 14:24:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:00,630 INFO L225 Difference]: With dead ends: 44737 [2021-08-06 14:24:00,630 INFO L226 Difference]: Without dead ends: 44737 [2021-08-06 14:24:00,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:24:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44737 states. [2021-08-06 14:24:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44737 to 44520. [2021-08-06 14:24:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44520 states, 44519 states have (on average 3.3897886295738897) internal successors, (150910), 44519 states have internal predecessors, (150910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44520 states to 44520 states and 150910 transitions. [2021-08-06 14:24:01,889 INFO L78 Accepts]: Start accepts. Automaton has 44520 states and 150910 transitions. Word has length 22 [2021-08-06 14:24:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:01,889 INFO L470 AbstractCegarLoop]: Abstraction has 44520 states and 150910 transitions. [2021-08-06 14:24:01,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 44520 states and 150910 transitions. [2021-08-06 14:24:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:01,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:01,904 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:01,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:02,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:02,125 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash 262545456, now seen corresponding path program 201 times [2021-08-06 14:24:02,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:02,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149622535] [2021-08-06 14:24:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:02,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:02,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:02,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149622535] [2021-08-06 14:24:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149622535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:02,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657538375] [2021-08-06 14:24:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:02,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:02,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:02,235 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:02,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-06 14:24:03,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:24:03,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:03,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:03,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:04,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657538375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:04,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:04,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:04,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072170770] [2021-08-06 14:24:04,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:04,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:04,060 INFO L87 Difference]: Start difference. First operand 44520 states and 150910 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) [2021-08-06 14:24:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:04,516 INFO L93 Difference]: Finished difference Result 44855 states and 151456 transitions. [2021-08-06 14:24:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:24:04,517 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 [2021-08-06 14:24:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:04,683 INFO L225 Difference]: With dead ends: 44855 [2021-08-06 14:24:04,683 INFO L226 Difference]: Without dead ends: 44855 [2021-08-06 14:24:04,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:24:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44855 states. [2021-08-06 14:24:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44855 to 44511. [2021-08-06 14:24:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44511 states, 44510 states have (on average 3.3898225117951024) internal successors, (150881), 44510 states have internal predecessors, (150881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44511 states to 44511 states and 150881 transitions. [2021-08-06 14:24:05,803 INFO L78 Accepts]: Start accepts. Automaton has 44511 states and 150881 transitions. Word has length 22 [2021-08-06 14:24:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:05,804 INFO L470 AbstractCegarLoop]: Abstraction has 44511 states and 150881 transitions. [2021-08-06 14:24:05,804 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) [2021-08-06 14:24:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 44511 states and 150881 transitions. [2021-08-06 14:24:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:05,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:05,817 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:05,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2021-08-06 14:24:06,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:06,018 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -582425996, now seen corresponding path program 202 times [2021-08-06 14:24:06,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:06,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465847989] [2021-08-06 14:24:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:06,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:06,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:06,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465847989] [2021-08-06 14:24:06,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465847989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:06,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792961632] [2021-08-06 14:24:06,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:06,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:06,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:06,361 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:06,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-06 14:24:08,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:08,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:08,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:08,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:08,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792961632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:08,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:08,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:08,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450420607] [2021-08-06 14:24:08,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:08,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:08,244 INFO L87 Difference]: Start difference. First operand 44511 states and 150881 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) [2021-08-06 14:24:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:08,653 INFO L93 Difference]: Finished difference Result 45012 states and 152002 transitions. [2021-08-06 14:24:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:24:08,654 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 [2021-08-06 14:24:08,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:08,919 INFO L225 Difference]: With dead ends: 45012 [2021-08-06 14:24:08,919 INFO L226 Difference]: Without dead ends: 45012 [2021-08-06 14:24:08,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:24:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45012 states. [2021-08-06 14:24:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45012 to 44703. [2021-08-06 14:24:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44703 states, 44702 states have (on average 3.388192922016912) internal successors, (151459), 44702 states have internal predecessors, (151459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44703 states to 44703 states and 151459 transitions. [2021-08-06 14:24:09,950 INFO L78 Accepts]: Start accepts. Automaton has 44703 states and 151459 transitions. Word has length 22 [2021-08-06 14:24:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:09,951 INFO L470 AbstractCegarLoop]: Abstraction has 44703 states and 151459 transitions. [2021-08-06 14:24:09,951 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) [2021-08-06 14:24:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 44703 states and 151459 transitions. [2021-08-06 14:24:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:09,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:09,963 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:09,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2021-08-06 14:24:10,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-06 14:24:10,164 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1006737232, now seen corresponding path program 203 times [2021-08-06 14:24:10,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:10,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564259752] [2021-08-06 14:24:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:10,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:10,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:10,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564259752] [2021-08-06 14:24:10,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564259752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:10,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082785715] [2021-08-06 14:24:10,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:10,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:10,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:10,517 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) [2021-08-06 14:24:10,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-06 14:24:12,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:24:12,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:12,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:12,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082785715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:12,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:12,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:12,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816544832] [2021-08-06 14:24:12,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:12,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:12,379 INFO L87 Difference]: Start difference. First operand 44703 states and 151459 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) [2021-08-06 14:24:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:12,845 INFO L93 Difference]: Finished difference Result 45138 states and 152319 transitions. [2021-08-06 14:24:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:24:12,845 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 22 [2021-08-06 14:24:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:12,987 INFO L225 Difference]: With dead ends: 45138 [2021-08-06 14:24:12,988 INFO L226 Difference]: Without dead ends: 45138 [2021-08-06 14:24:12,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:24:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45138 states. [2021-08-06 14:24:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45138 to 44778. [2021-08-06 14:24:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44778 states, 44777 states have (on average 3.387542711660004) internal successors, (151684), 44777 states have internal predecessors, (151684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44778 states to 44778 states and 151684 transitions. [2021-08-06 14:24:14,085 INFO L78 Accepts]: Start accepts. Automaton has 44778 states and 151684 transitions. Word has length 22 [2021-08-06 14:24:14,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:14,085 INFO L470 AbstractCegarLoop]: Abstraction has 44778 states and 151684 transitions. [2021-08-06 14:24:14,085 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) [2021-08-06 14:24:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 44778 states and 151684 transitions. [2021-08-06 14:24:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:14,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:14,099 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:14,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2021-08-06 14:24:14,299 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 [2021-08-06 14:24:14,299 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1275483660, now seen corresponding path program 204 times [2021-08-06 14:24:14,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:14,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324074958] [2021-08-06 14:24:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:14,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:14,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:14,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324074958] [2021-08-06 14:24:14,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324074958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:14,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194231235] [2021-08-06 14:24:14,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:14,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:14,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:14,418 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) [2021-08-06 14:24:14,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-06 14:24:16,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:24:16,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:16,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194231235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:16,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:16,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:16,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474492767] [2021-08-06 14:24:16,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:16,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:16,476 INFO L87 Difference]: Start difference. First operand 44778 states and 151684 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) [2021-08-06 14:24:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:17,049 INFO L93 Difference]: Finished difference Result 45360 states and 152909 transitions. [2021-08-06 14:24:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:24:17,049 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 [2021-08-06 14:24:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:17,287 INFO L225 Difference]: With dead ends: 45360 [2021-08-06 14:24:17,287 INFO L226 Difference]: Without dead ends: 45360 [2021-08-06 14:24:17,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=591, Invalid=1215, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 14:24:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45360 states. [2021-08-06 14:24:18,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45360 to 44814. [2021-08-06 14:24:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44814 states, 44813 states have (on average 3.387231383750251) internal successors, (151792), 44813 states have internal predecessors, (151792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44814 states to 44814 states and 151792 transitions. [2021-08-06 14:24:18,297 INFO L78 Accepts]: Start accepts. Automaton has 44814 states and 151792 transitions. Word has length 22 [2021-08-06 14:24:18,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:18,298 INFO L470 AbstractCegarLoop]: Abstraction has 44814 states and 151792 transitions. [2021-08-06 14:24:18,298 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) [2021-08-06 14:24:18,298 INFO L276 IsEmpty]: Start isEmpty. Operand 44814 states and 151792 transitions. [2021-08-06 14:24:18,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:18,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:18,311 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:18,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2021-08-06 14:24:18,511 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 [2021-08-06 14:24:18,511 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1016688336, now seen corresponding path program 205 times [2021-08-06 14:24:18,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:18,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090856103] [2021-08-06 14:24:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:18,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:18,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:18,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090856103] [2021-08-06 14:24:18,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090856103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:18,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97544141] [2021-08-06 14:24:18,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:18,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:18,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:18,636 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) [2021-08-06 14:24:18,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-06 14:24:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:20,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97544141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:20,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:20,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:20,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802193462] [2021-08-06 14:24:20,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:20,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:20,701 INFO L87 Difference]: Start difference. First operand 44814 states and 151792 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) [2021-08-06 14:24:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:21,315 INFO L93 Difference]: Finished difference Result 45802 states and 154191 transitions. [2021-08-06 14:24:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 14:24:21,316 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 [2021-08-06 14:24:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:21,558 INFO L225 Difference]: With dead ends: 45802 [2021-08-06 14:24:21,558 INFO L226 Difference]: Without dead ends: 45802 [2021-08-06 14:24:21,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 14:24:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45802 states. [2021-08-06 14:24:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45802 to 44851. [2021-08-06 14:24:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44851 states, 44850 states have (on average 3.386911928651059) internal successors, (151903), 44850 states have internal predecessors, (151903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44851 states to 44851 states and 151903 transitions. [2021-08-06 14:24:22,664 INFO L78 Accepts]: Start accepts. Automaton has 44851 states and 151903 transitions. Word has length 22 [2021-08-06 14:24:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:22,664 INFO L470 AbstractCegarLoop]: Abstraction has 44851 states and 151903 transitions. [2021-08-06 14:24:22,664 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) [2021-08-06 14:24:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 44851 states and 151903 transitions. [2021-08-06 14:24:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:22,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:22,678 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:22,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2021-08-06 14:24:22,878 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 [2021-08-06 14:24:22,878 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:22,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:22,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2141020428, now seen corresponding path program 206 times [2021-08-06 14:24:22,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:22,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220242349] [2021-08-06 14:24:22,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:22,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:23,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:23,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220242349] [2021-08-06 14:24:23,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220242349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:23,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498851662] [2021-08-06 14:24:23,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:23,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:23,209 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) [2021-08-06 14:24:23,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-06 14:24:24,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:24,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:24,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:24,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:25,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498851662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:25,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:25,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-06 14:24:25,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767982176] [2021-08-06 14:24:25,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:24:25,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:24:25,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:25,083 INFO L87 Difference]: Start difference. First operand 44851 states and 151903 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:25,571 INFO L93 Difference]: Finished difference Result 45170 states and 152306 transitions. [2021-08-06 14:24:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:24:25,571 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 [2021-08-06 14:24:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:25,803 INFO L225 Difference]: With dead ends: 45170 [2021-08-06 14:24:25,803 INFO L226 Difference]: Without dead ends: 45166 [2021-08-06 14:24:25,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:24:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45166 states. [2021-08-06 14:24:26,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45166 to 44804. [2021-08-06 14:24:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44804 states, 44803 states have (on average 3.38655893578555) internal successors, (151728), 44803 states have internal predecessors, (151728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44804 states to 44804 states and 151728 transitions. [2021-08-06 14:24:26,846 INFO L78 Accepts]: Start accepts. Automaton has 44804 states and 151728 transitions. Word has length 22 [2021-08-06 14:24:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:26,846 INFO L470 AbstractCegarLoop]: Abstraction has 44804 states and 151728 transitions. [2021-08-06 14:24:26,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 44804 states and 151728 transitions. [2021-08-06 14:24:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:26,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:26,859 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:26,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2021-08-06 14:24:27,061 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 [2021-08-06 14:24:27,061 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash 300005620, now seen corresponding path program 207 times [2021-08-06 14:24:27,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:27,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752449859] [2021-08-06 14:24:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:27,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:27,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:27,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752449859] [2021-08-06 14:24:27,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752449859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:27,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623578928] [2021-08-06 14:24:27,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:27,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:27,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:27,379 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) [2021-08-06 14:24:27,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-06 14:24:29,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:24:29,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:29,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:29,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:29,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623578928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:29,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:29,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:29,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621592817] [2021-08-06 14:24:29,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:29,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:29,294 INFO L87 Difference]: Start difference. First operand 44804 states and 151728 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) [2021-08-06 14:24:29,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:29,992 INFO L93 Difference]: Finished difference Result 52682 states and 175350 transitions. [2021-08-06 14:24:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:24:29,992 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 [2021-08-06 14:24:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:30,137 INFO L225 Difference]: With dead ends: 52682 [2021-08-06 14:24:30,138 INFO L226 Difference]: Without dead ends: 52682 [2021-08-06 14:24:30,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=640, Invalid=1252, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:24:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52682 states. [2021-08-06 14:24:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52682 to 47017. [2021-08-06 14:24:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47017 states, 47016 states have (on average 3.370831206397822) internal successors, (158483), 47016 states have internal predecessors, (158483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47017 states to 47017 states and 158483 transitions. [2021-08-06 14:24:31,441 INFO L78 Accepts]: Start accepts. Automaton has 47017 states and 158483 transitions. Word has length 22 [2021-08-06 14:24:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:31,442 INFO L470 AbstractCegarLoop]: Abstraction has 47017 states and 158483 transitions. [2021-08-06 14:24:31,442 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) [2021-08-06 14:24:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 47017 states and 158483 transitions. [2021-08-06 14:24:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:31,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:31,455 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:31,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2021-08-06 14:24:31,655 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 [2021-08-06 14:24:31,655 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:31,655 INFO L82 PathProgramCache]: Analyzing trace with hash 31259192, now seen corresponding path program 208 times [2021-08-06 14:24:31,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:31,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638625586] [2021-08-06 14:24:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:31,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:31,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:31,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638625586] [2021-08-06 14:24:31,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638625586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:31,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731289765] [2021-08-06 14:24:31,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:31,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:31,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:31,771 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) [2021-08-06 14:24:31,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-06 14:24:33,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:33,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:33,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:33,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731289765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:33,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:33,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:33,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388314556] [2021-08-06 14:24:33,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:33,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:33,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:33,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:33,714 INFO L87 Difference]: Start difference. First operand 47017 states and 158483 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) [2021-08-06 14:24:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:34,320 INFO L93 Difference]: Finished difference Result 48872 states and 163310 transitions. [2021-08-06 14:24:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:24:34,320 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 [2021-08-06 14:24:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:34,472 INFO L225 Difference]: With dead ends: 48872 [2021-08-06 14:24:34,472 INFO L226 Difference]: Without dead ends: 48872 [2021-08-06 14:24:34,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 372.6ms TimeCoverageRelationStatistics Valid=589, Invalid=1133, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 14:24:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48872 states. [2021-08-06 14:24:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48872 to 46706. [2021-08-06 14:24:35,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46706 states, 46705 states have (on average 3.3734075580772935) internal successors, (157555), 46705 states have internal predecessors, (157555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46706 states to 46706 states and 157555 transitions. [2021-08-06 14:24:35,789 INFO L78 Accepts]: Start accepts. Automaton has 46706 states and 157555 transitions. Word has length 22 [2021-08-06 14:24:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:35,789 INFO L470 AbstractCegarLoop]: Abstraction has 46706 states and 157555 transitions. [2021-08-06 14:24:35,789 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) [2021-08-06 14:24:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 46706 states and 157555 transitions. [2021-08-06 14:24:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:35,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:35,803 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:35,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2021-08-06 14:24:36,003 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 [2021-08-06 14:24:36,004 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:36,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:36,004 INFO L82 PathProgramCache]: Analyzing trace with hash -393052044, now seen corresponding path program 209 times [2021-08-06 14:24:36,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:36,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768168679] [2021-08-06 14:24:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:36,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:36,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:36,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768168679] [2021-08-06 14:24:36,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768168679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:36,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834695114] [2021-08-06 14:24:36,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:36,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:36,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:36,126 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) [2021-08-06 14:24:36,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-06 14:24:38,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:24:38,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:38,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:38,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834695114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:38,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:38,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:38,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481613752] [2021-08-06 14:24:38,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:38,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:38,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:38,220 INFO L87 Difference]: Start difference. First operand 46706 states and 157555 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) [2021-08-06 14:24:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:38,913 INFO L93 Difference]: Finished difference Result 48717 states and 162772 transitions. [2021-08-06 14:24:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 14:24:38,913 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 [2021-08-06 14:24:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:39,054 INFO L225 Difference]: With dead ends: 48717 [2021-08-06 14:24:39,055 INFO L226 Difference]: Without dead ends: 48717 [2021-08-06 14:24:39,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=751, Invalid=1505, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 14:24:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48717 states. [2021-08-06 14:24:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48717 to 46732. [2021-08-06 14:24:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46732 states, 46731 states have (on average 3.3739059724807943) internal successors, (157666), 46731 states have internal predecessors, (157666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46732 states to 46732 states and 157666 transitions. [2021-08-06 14:24:40,270 INFO L78 Accepts]: Start accepts. Automaton has 46732 states and 157666 transitions. Word has length 22 [2021-08-06 14:24:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:40,271 INFO L470 AbstractCegarLoop]: Abstraction has 46732 states and 157666 transitions. [2021-08-06 14:24:40,271 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) [2021-08-06 14:24:40,271 INFO L276 IsEmpty]: Start isEmpty. Operand 46732 states and 157666 transitions. [2021-08-06 14:24:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:40,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:40,284 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:40,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-06 14:24:40,484 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 [2021-08-06 14:24:40,484 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 290054516, now seen corresponding path program 210 times [2021-08-06 14:24:40,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:40,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836978173] [2021-08-06 14:24:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:40,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:40,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:40,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836978173] [2021-08-06 14:24:40,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836978173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:40,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131824203] [2021-08-06 14:24:40,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:40,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:40,596 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) [2021-08-06 14:24:40,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-06 14:24:42,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:24:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:42,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131824203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:42,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:42,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:42,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465862114] [2021-08-06 14:24:42,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:42,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:42,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:42,742 INFO L87 Difference]: Start difference. First operand 46732 states and 157666 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) [2021-08-06 14:24:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:43,263 INFO L93 Difference]: Finished difference Result 47443 states and 159160 transitions. [2021-08-06 14:24:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:24:43,263 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 [2021-08-06 14:24:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:43,421 INFO L225 Difference]: With dead ends: 47443 [2021-08-06 14:24:43,421 INFO L226 Difference]: Without dead ends: 47443 [2021-08-06 14:24:43,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=508, Invalid=974, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:24:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47443 states. [2021-08-06 14:24:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47443 to 46668. [2021-08-06 14:24:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46668 states, 46667 states have (on average 3.3746330383354404) internal successors, (157484), 46667 states have internal predecessors, (157484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46668 states to 46668 states and 157484 transitions. [2021-08-06 14:24:44,607 INFO L78 Accepts]: Start accepts. Automaton has 46668 states and 157484 transitions. Word has length 22 [2021-08-06 14:24:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:44,608 INFO L470 AbstractCegarLoop]: Abstraction has 46668 states and 157484 transitions. [2021-08-06 14:24:44,608 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) [2021-08-06 14:24:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 46668 states and 157484 transitions. [2021-08-06 14:24:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:44,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:44,621 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:44,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2021-08-06 14:24:44,821 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 [2021-08-06 14:24:44,822 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:44,822 INFO L82 PathProgramCache]: Analyzing trace with hash -134256720, now seen corresponding path program 211 times [2021-08-06 14:24:44,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:44,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004270718] [2021-08-06 14:24:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:44,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:44,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:44,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004270718] [2021-08-06 14:24:44,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004270718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:44,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520538394] [2021-08-06 14:24:44,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:44,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:44,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:44,940 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) [2021-08-06 14:24:44,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-06 14:24:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:46,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:46,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:47,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520538394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:47,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:47,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:47,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576001583] [2021-08-06 14:24:47,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:47,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:47,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:47,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:47,096 INFO L87 Difference]: Start difference. First operand 46668 states and 157484 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) [2021-08-06 14:24:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:47,655 INFO L93 Difference]: Finished difference Result 47364 states and 159029 transitions. [2021-08-06 14:24:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:24:47,656 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 [2021-08-06 14:24:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:47,802 INFO L225 Difference]: With dead ends: 47364 [2021-08-06 14:24:47,802 INFO L226 Difference]: Without dead ends: 47364 [2021-08-06 14:24:47,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=591, Invalid=1215, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 14:24:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47364 states. [2021-08-06 14:24:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47364 to 46605. [2021-08-06 14:24:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46605 states, 46604 states have (on average 3.375160930392241) internal successors, (157296), 46604 states have internal predecessors, (157296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46605 states to 46605 states and 157296 transitions. [2021-08-06 14:24:48,907 INFO L78 Accepts]: Start accepts. Automaton has 46605 states and 157296 transitions. Word has length 22 [2021-08-06 14:24:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:48,907 INFO L470 AbstractCegarLoop]: Abstraction has 46605 states and 157296 transitions. [2021-08-06 14:24:48,907 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) [2021-08-06 14:24:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 46605 states and 157296 transitions. [2021-08-06 14:24:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:48,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:48,921 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:48,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:49,121 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 [2021-08-06 14:24:49,121 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:49,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:49,122 INFO L82 PathProgramCache]: Analyzing trace with hash -403003148, now seen corresponding path program 212 times [2021-08-06 14:24:49,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:49,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482538579] [2021-08-06 14:24:49,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:49,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:49,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:49,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482538579] [2021-08-06 14:24:49,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482538579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:49,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056649428] [2021-08-06 14:24:49,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:49,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:49,471 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) [2021-08-06 14:24:49,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-06 14:24:51,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:51,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:51,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:51,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056649428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:51,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:51,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:51,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950268008] [2021-08-06 14:24:51,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:51,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:51,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:51,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:51,397 INFO L87 Difference]: Start difference. First operand 46605 states and 157296 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) [2021-08-06 14:24:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:52,092 INFO L93 Difference]: Finished difference Result 47915 states and 160630 transitions. [2021-08-06 14:24:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 14:24:52,092 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 [2021-08-06 14:24:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:52,222 INFO L225 Difference]: With dead ends: 47915 [2021-08-06 14:24:52,222 INFO L226 Difference]: Without dead ends: 47915 [2021-08-06 14:24:52,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=776, Invalid=1576, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 14:24:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47915 states. [2021-08-06 14:24:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47915 to 46585. [2021-08-06 14:24:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 46584 states have (on average 3.3753219989696035) internal successors, (157236), 46584 states have internal predecessors, (157236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 157236 transitions. [2021-08-06 14:24:53,510 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 157236 transitions. Word has length 22 [2021-08-06 14:24:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:53,510 INFO L470 AbstractCegarLoop]: Abstraction has 46585 states and 157236 transitions. [2021-08-06 14:24:53,510 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) [2021-08-06 14:24:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 157236 transitions. [2021-08-06 14:24:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:53,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:53,523 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:53,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:53,723 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 [2021-08-06 14:24:53,724 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:53,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:53,724 INFO L82 PathProgramCache]: Analyzing trace with hash -277225032, now seen corresponding path program 213 times [2021-08-06 14:24:53,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:53,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952992132] [2021-08-06 14:24:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:53,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:53,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:53,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952992132] [2021-08-06 14:24:53,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952992132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:53,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757417483] [2021-08-06 14:24:53,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:53,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:53,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:53,837 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) [2021-08-06 14:24:53,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-06 14:24:55,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:24:55,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:24:55,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:55,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757417483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:55,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:55,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:24:55,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850360676] [2021-08-06 14:24:55,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:55,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:55,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:55,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:55,807 INFO L87 Difference]: Start difference. First operand 46585 states and 157236 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) [2021-08-06 14:24:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:56,313 INFO L93 Difference]: Finished difference Result 47000 states and 158039 transitions. [2021-08-06 14:24:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:24:56,313 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 [2021-08-06 14:24:56,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:56,478 INFO L225 Difference]: With dead ends: 47000 [2021-08-06 14:24:56,479 INFO L226 Difference]: Without dead ends: 47000 [2021-08-06 14:24:56,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=402, Invalid=788, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:24:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47000 states. [2021-08-06 14:24:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47000 to 46597. [2021-08-06 14:24:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46597 states, 46596 states have (on average 3.375225341231007) internal successors, (157272), 46596 states have internal predecessors, (157272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46597 states to 46597 states and 157272 transitions. [2021-08-06 14:24:57,780 INFO L78 Accepts]: Start accepts. Automaton has 46597 states and 157272 transitions. Word has length 22 [2021-08-06 14:24:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:57,780 INFO L470 AbstractCegarLoop]: Abstraction has 46597 states and 157272 transitions. [2021-08-06 14:24:57,780 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) [2021-08-06 14:24:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 46597 states and 157272 transitions. [2021-08-06 14:24:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:24:57,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:57,794 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:57,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2021-08-06 14:24:57,994 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 [2021-08-06 14:24:57,994 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:57,995 INFO L82 PathProgramCache]: Analyzing trace with hash -701536268, now seen corresponding path program 214 times [2021-08-06 14:24:57,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:57,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870619032] [2021-08-06 14:24:57,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:57,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:58,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:58,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870619032] [2021-08-06 14:24:58,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870619032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:58,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416617157] [2021-08-06 14:24:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:58,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:58,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:58,111 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) [2021-08-06 14:24:58,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-06 14:25:00,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:00,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416617157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:00,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:00,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:25:00,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098343028] [2021-08-06 14:25:00,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:00,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:00,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:00,193 INFO L87 Difference]: Start difference. First operand 46597 states and 157272 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) [2021-08-06 14:25:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:00,666 INFO L93 Difference]: Finished difference Result 46908 states and 157845 transitions. [2021-08-06 14:25:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:25:00,667 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 [2021-08-06 14:25:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:00,818 INFO L225 Difference]: With dead ends: 46908 [2021-08-06 14:25:00,818 INFO L226 Difference]: Without dead ends: 46908 [2021-08-06 14:25:00,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=403, Invalid=857, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:25:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46908 states. [2021-08-06 14:25:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46908 to 46553. [2021-08-06 14:25:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46553 states, 46552 states have (on average 3.3755799965629834) internal successors, (157140), 46552 states have internal predecessors, (157140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46553 states to 46553 states and 157140 transitions. [2021-08-06 14:25:02,054 INFO L78 Accepts]: Start accepts. Automaton has 46553 states and 157140 transitions. Word has length 22 [2021-08-06 14:25:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:02,054 INFO L470 AbstractCegarLoop]: Abstraction has 46553 states and 157140 transitions. [2021-08-06 14:25:02,054 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) [2021-08-06 14:25:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 46553 states and 157140 transitions. [2021-08-06 14:25:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:02,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:02,071 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:02,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-06 14:25:02,271 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 [2021-08-06 14:25:02,272 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:02,272 INFO L82 PathProgramCache]: Analyzing trace with hash -970282696, now seen corresponding path program 215 times [2021-08-06 14:25:02,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:02,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180693276] [2021-08-06 14:25:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:02,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:02,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:02,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180693276] [2021-08-06 14:25:02,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180693276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:02,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911889027] [2021-08-06 14:25:02,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:02,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:02,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:02,439 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) [2021-08-06 14:25:02,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-06 14:25:04,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:25:04,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:04,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:04,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:04,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911889027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:04,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:04,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:25:04,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117746147] [2021-08-06 14:25:04,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:04,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:04,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:04,658 INFO L87 Difference]: Start difference. First operand 46553 states and 157140 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) [2021-08-06 14:25:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:05,319 INFO L93 Difference]: Finished difference Result 47013 states and 158092 transitions. [2021-08-06 14:25:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:25:05,320 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 [2021-08-06 14:25:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:05,485 INFO L225 Difference]: With dead ends: 47013 [2021-08-06 14:25:05,485 INFO L226 Difference]: Without dead ends: 47013 [2021-08-06 14:25:05,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=590, Invalid=1216, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 14:25:05,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47013 states. [2021-08-06 14:25:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47013 to 46548. [2021-08-06 14:25:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46548 states, 46547 states have (on average 3.3756203407308742) internal successors, (157125), 46547 states have internal predecessors, (157125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46548 states to 46548 states and 157125 transitions. [2021-08-06 14:25:06,745 INFO L78 Accepts]: Start accepts. Automaton has 46548 states and 157125 transitions. Word has length 22 [2021-08-06 14:25:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:06,745 INFO L470 AbstractCegarLoop]: Abstraction has 46548 states and 157125 transitions. [2021-08-06 14:25:06,745 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) [2021-08-06 14:25:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 46548 states and 157125 transitions. [2021-08-06 14:25:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:06,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:06,759 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:06,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-06 14:25:06,959 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 [2021-08-06 14:25:06,959 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:06,960 INFO L82 PathProgramCache]: Analyzing trace with hash -711487372, now seen corresponding path program 216 times [2021-08-06 14:25:06,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:06,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72523029] [2021-08-06 14:25:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:06,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:07,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:07,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72523029] [2021-08-06 14:25:07,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72523029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:07,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120423748] [2021-08-06 14:25:07,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:07,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:07,104 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) [2021-08-06 14:25:07,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-06 14:25:09,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:25:09,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:09,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:09,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:09,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120423748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:09,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:09,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:25:09,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762314475] [2021-08-06 14:25:09,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:09,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:09,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:09,496 INFO L87 Difference]: Start difference. First operand 46548 states and 157125 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) [2021-08-06 14:25:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:10,140 INFO L93 Difference]: Finished difference Result 47288 states and 158903 transitions. [2021-08-06 14:25:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 14:25:10,140 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 [2021-08-06 14:25:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:10,294 INFO L225 Difference]: With dead ends: 47288 [2021-08-06 14:25:10,294 INFO L226 Difference]: Without dead ends: 47288 [2021-08-06 14:25:10,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=717, Invalid=1445, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 14:25:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47288 states. [2021-08-06 14:25:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47288 to 46545. [2021-08-06 14:25:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46545 states, 46544 states have (on average 3.375644551392231) internal successors, (157116), 46544 states have internal predecessors, (157116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46545 states to 46545 states and 157116 transitions. [2021-08-06 14:25:11,416 INFO L78 Accepts]: Start accepts. Automaton has 46545 states and 157116 transitions. Word has length 22 [2021-08-06 14:25:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:11,416 INFO L470 AbstractCegarLoop]: Abstraction has 46545 states and 157116 transitions. [2021-08-06 14:25:11,416 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) [2021-08-06 14:25:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 46545 states and 157116 transitions. [2021-08-06 14:25:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:11,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:11,430 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:11,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:11,640 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 [2021-08-06 14:25:11,641 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash -759303900, now seen corresponding path program 217 times [2021-08-06 14:25:11,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:11,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944501986] [2021-08-06 14:25:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:11,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:11,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:11,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944501986] [2021-08-06 14:25:11,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944501986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:11,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515593890] [2021-08-06 14:25:11,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:11,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:11,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:11,950 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) [2021-08-06 14:25:11,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-06 14:25:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:13,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:13,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:13,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515593890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:13,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:13,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:25:13,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284717738] [2021-08-06 14:25:13,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:13,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:13,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:13,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:13,952 INFO L87 Difference]: Start difference. First operand 46545 states and 157116 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) [2021-08-06 14:25:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:14,404 INFO L93 Difference]: Finished difference Result 51883 states and 174173 transitions. [2021-08-06 14:25:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:25:14,405 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 [2021-08-06 14:25:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:14,679 INFO L225 Difference]: With dead ends: 51883 [2021-08-06 14:25:14,679 INFO L226 Difference]: Without dead ends: 51881 [2021-08-06 14:25:14,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:25:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51881 states. [2021-08-06 14:25:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51881 to 51635. [2021-08-06 14:25:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51635 states, 51634 states have (on average 3.3678583878839525) internal successors, (173896), 51634 states have internal predecessors, (173896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51635 states to 51635 states and 173896 transitions. [2021-08-06 14:25:16,157 INFO L78 Accepts]: Start accepts. Automaton has 51635 states and 173896 transitions. Word has length 22 [2021-08-06 14:25:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:16,157 INFO L470 AbstractCegarLoop]: Abstraction has 51635 states and 173896 transitions. [2021-08-06 14:25:16,157 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) [2021-08-06 14:25:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 51635 states and 173896 transitions. [2021-08-06 14:25:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:16,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:16,174 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:16,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2021-08-06 14:25:16,374 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 [2021-08-06 14:25:16,374 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1678791540, now seen corresponding path program 218 times [2021-08-06 14:25:16,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:16,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043185462] [2021-08-06 14:25:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:16,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:16,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:16,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043185462] [2021-08-06 14:25:16,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043185462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:16,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446966007] [2021-08-06 14:25:16,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:16,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:16,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:16,477 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) [2021-08-06 14:25:16,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-06 14:25:18,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:18,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:18,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:18,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446966007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:18,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:18,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:25:18,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725269451] [2021-08-06 14:25:18,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:18,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:18,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:18,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:18,530 INFO L87 Difference]: Start difference. First operand 51635 states and 173896 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) [2021-08-06 14:25:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:18,952 INFO L93 Difference]: Finished difference Result 52235 states and 175193 transitions. [2021-08-06 14:25:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:25:18,953 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 [2021-08-06 14:25:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:19,130 INFO L225 Difference]: With dead ends: 52235 [2021-08-06 14:25:19,130 INFO L226 Difference]: Without dead ends: 52235 [2021-08-06 14:25:19,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=167, Invalid=253, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:25:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52235 states. [2021-08-06 14:25:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52235 to 51636. [2021-08-06 14:25:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51636 states, 51635 states have (on average 3.3678125302604824) internal successors, (173897), 51635 states have internal predecessors, (173897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51636 states to 51636 states and 173897 transitions. [2021-08-06 14:25:20,566 INFO L78 Accepts]: Start accepts. Automaton has 51636 states and 173897 transitions. Word has length 22 [2021-08-06 14:25:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:20,566 INFO L470 AbstractCegarLoop]: Abstraction has 51636 states and 173897 transitions. [2021-08-06 14:25:20,566 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) [2021-08-06 14:25:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 51636 states and 173897 transitions. [2021-08-06 14:25:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:20,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:20,582 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:20,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2021-08-06 14:25:20,782 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 [2021-08-06 14:25:20,782 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash -905562448, now seen corresponding path program 219 times [2021-08-06 14:25:20,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:20,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324515202] [2021-08-06 14:25:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:20,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:20,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:20,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324515202] [2021-08-06 14:25:20,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324515202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:20,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207074980] [2021-08-06 14:25:20,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:20,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:20,883 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) [2021-08-06 14:25:20,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-06 14:25:22,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:25:22,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:22,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:22,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:23,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207074980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:23,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:23,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:25:23,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690809655] [2021-08-06 14:25:23,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:23,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:23,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:23,093 INFO L87 Difference]: Start difference. First operand 51636 states and 173897 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:23,498 INFO L93 Difference]: Finished difference Result 52594 states and 176206 transitions. [2021-08-06 14:25:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:25:23,498 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 [2021-08-06 14:25:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:23,663 INFO L225 Difference]: With dead ends: 52594 [2021-08-06 14:25:23,663 INFO L226 Difference]: Without dead ends: 52594 [2021-08-06 14:25:23,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:25:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52594 states. [2021-08-06 14:25:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52594 to 51660. [2021-08-06 14:25:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51660 states, 51659 states have (on average 3.3676029346290095) internal successors, (173967), 51659 states have internal predecessors, (173967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51660 states to 51660 states and 173967 transitions. [2021-08-06 14:25:25,083 INFO L78 Accepts]: Start accepts. Automaton has 51660 states and 173967 transitions. Word has length 22 [2021-08-06 14:25:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:25,083 INFO L470 AbstractCegarLoop]: Abstraction has 51660 states and 173967 transitions. [2021-08-06 14:25:25,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 51660 states and 173967 transitions. [2021-08-06 14:25:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:25,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:25,097 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:25,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:25,298 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 [2021-08-06 14:25:25,299 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash 583842548, now seen corresponding path program 220 times [2021-08-06 14:25:25,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:25,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387263262] [2021-08-06 14:25:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:25,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:25,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:25,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387263262] [2021-08-06 14:25:25,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387263262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:25,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627507430] [2021-08-06 14:25:25,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:25,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:25,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:25,634 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) [2021-08-06 14:25:25,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-06 14:25:27,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:27,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:27,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:27,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:27,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627507430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:27,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:27,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:25:27,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736502668] [2021-08-06 14:25:27,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:27,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:27,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:27,681 INFO L87 Difference]: Start difference. First operand 51660 states and 173967 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:28,227 INFO L93 Difference]: Finished difference Result 56920 states and 190512 transitions. [2021-08-06 14:25:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:25:28,227 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 [2021-08-06 14:25:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:28,402 INFO L225 Difference]: With dead ends: 56920 [2021-08-06 14:25:28,402 INFO L226 Difference]: Without dead ends: 56920 [2021-08-06 14:25:28,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:25:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56920 states. [2021-08-06 14:25:29,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56920 to 55072. [2021-08-06 14:25:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55072 states, 55071 states have (on average 3.366345263387264) internal successors, (185388), 55071 states have internal predecessors, (185388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55072 states to 55072 states and 185388 transitions. [2021-08-06 14:25:29,870 INFO L78 Accepts]: Start accepts. Automaton has 55072 states and 185388 transitions. Word has length 22 [2021-08-06 14:25:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:29,870 INFO L470 AbstractCegarLoop]: Abstraction has 55072 states and 185388 transitions. [2021-08-06 14:25:29,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 55072 states and 185388 transitions. [2021-08-06 14:25:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:29,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:29,885 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:29,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-06 14:25:30,085 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 [2021-08-06 14:25:30,086 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:30,086 INFO L82 PathProgramCache]: Analyzing trace with hash -489242832, now seen corresponding path program 221 times [2021-08-06 14:25:30,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:30,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573801679] [2021-08-06 14:25:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:30,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:30,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:30,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573801679] [2021-08-06 14:25:30,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573801679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:30,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551213481] [2021-08-06 14:25:30,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:30,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:30,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:30,190 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) [2021-08-06 14:25:30,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-06 14:25:32,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:25:32,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:32,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:32,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551213481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:32,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:32,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:25:32,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271278661] [2021-08-06 14:25:32,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:32,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:32,439 INFO L87 Difference]: Start difference. First operand 55072 states and 185388 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:32,897 INFO L93 Difference]: Finished difference Result 59247 states and 197975 transitions. [2021-08-06 14:25:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:25:32,898 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 [2021-08-06 14:25:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:33,103 INFO L225 Difference]: With dead ends: 59247 [2021-08-06 14:25:33,103 INFO L226 Difference]: Without dead ends: 59247 [2021-08-06 14:25:33,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:25:33,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59247 states. [2021-08-06 14:25:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59247 to 57124. [2021-08-06 14:25:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57124 states, 57123 states have (on average 3.360065122630114) internal successors, (191937), 57123 states have internal predecessors, (191937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57124 states to 57124 states and 191937 transitions. [2021-08-06 14:25:34,874 INFO L78 Accepts]: Start accepts. Automaton has 57124 states and 191937 transitions. Word has length 22 [2021-08-06 14:25:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:34,874 INFO L470 AbstractCegarLoop]: Abstraction has 57124 states and 191937 transitions. [2021-08-06 14:25:34,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 57124 states and 191937 transitions. [2021-08-06 14:25:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:34,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:34,889 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:34,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:35,089 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 [2021-08-06 14:25:35,090 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash 604848756, now seen corresponding path program 222 times [2021-08-06 14:25:35,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:35,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289127539] [2021-08-06 14:25:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:35,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:35,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:35,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289127539] [2021-08-06 14:25:35,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289127539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:35,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472155325] [2021-08-06 14:25:35,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:35,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:35,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:35,196 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) [2021-08-06 14:25:35,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-06 14:25:37,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:25:37,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:37,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:37,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472155325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:37,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:37,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:25:37,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490387953] [2021-08-06 14:25:37,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:37,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:37,322 INFO L87 Difference]: Start difference. First operand 57124 states and 191937 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:37,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:37,810 INFO L93 Difference]: Finished difference Result 58648 states and 196175 transitions. [2021-08-06 14:25:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:25:37,811 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 [2021-08-06 14:25:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:38,008 INFO L225 Difference]: With dead ends: 58648 [2021-08-06 14:25:38,008 INFO L226 Difference]: Without dead ends: 58648 [2021-08-06 14:25:38,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:25:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58648 states. [2021-08-06 14:25:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58648 to 58197. [2021-08-06 14:25:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58197 states, 58196 states have (on average 3.3551618667949685) internal successors, (195257), 58196 states have internal predecessors, (195257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58197 states to 58197 states and 195257 transitions. [2021-08-06 14:25:39,575 INFO L78 Accepts]: Start accepts. Automaton has 58197 states and 195257 transitions. Word has length 22 [2021-08-06 14:25:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:39,576 INFO L470 AbstractCegarLoop]: Abstraction has 58197 states and 195257 transitions. [2021-08-06 14:25:39,576 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) [2021-08-06 14:25:39,576 INFO L276 IsEmpty]: Start isEmpty. Operand 58197 states and 195257 transitions. [2021-08-06 14:25:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:39,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:39,593 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:39,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2021-08-06 14:25:39,800 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 [2021-08-06 14:25:39,801 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash 161949616, now seen corresponding path program 223 times [2021-08-06 14:25:39,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:39,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286664665] [2021-08-06 14:25:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:39,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:40,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:40,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286664665] [2021-08-06 14:25:40,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286664665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:40,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456260397] [2021-08-06 14:25:40,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:40,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:40,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:40,179 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) [2021-08-06 14:25:40,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-06 14:25:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:42,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456260397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:42,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:42,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 14:25:42,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471375559] [2021-08-06 14:25:42,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:42,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:42,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:42,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:42,222 INFO L87 Difference]: Start difference. First operand 58197 states and 195257 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:42,679 INFO L93 Difference]: Finished difference Result 58496 states and 195930 transitions. [2021-08-06 14:25:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:25:42,680 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 [2021-08-06 14:25:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:42,865 INFO L225 Difference]: With dead ends: 58496 [2021-08-06 14:25:42,866 INFO L226 Difference]: Without dead ends: 58496 [2021-08-06 14:25:42,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:25:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58496 states. [2021-08-06 14:25:44,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58496 to 58361. [2021-08-06 14:25:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58361 states, 58360 states have (on average 3.3543522960932144) internal successors, (195760), 58360 states have internal predecessors, (195760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58361 states to 58361 states and 195760 transitions. [2021-08-06 14:25:44,366 INFO L78 Accepts]: Start accepts. Automaton has 58361 states and 195760 transitions. Word has length 22 [2021-08-06 14:25:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:44,366 INFO L470 AbstractCegarLoop]: Abstraction has 58361 states and 195760 transitions. [2021-08-06 14:25:44,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 58361 states and 195760 transitions. [2021-08-06 14:25:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:44,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:44,381 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:44,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2021-08-06 14:25:44,581 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 [2021-08-06 14:25:44,581 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:44,582 INFO L82 PathProgramCache]: Analyzing trace with hash -683021836, now seen corresponding path program 224 times [2021-08-06 14:25:44,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:44,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019057724] [2021-08-06 14:25:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:44,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:44,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:44,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019057724] [2021-08-06 14:25:44,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019057724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:44,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572824726] [2021-08-06 14:25:44,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:44,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:44,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:44,698 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) [2021-08-06 14:25:44,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-06 14:25:46,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:46,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:46,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572824726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:46,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:46,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:25:46,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109986566] [2021-08-06 14:25:46,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:46,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:46,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:46,982 INFO L87 Difference]: Start difference. First operand 58361 states and 195760 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) [2021-08-06 14:25:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:47,450 INFO L93 Difference]: Finished difference Result 58529 states and 195995 transitions. [2021-08-06 14:25:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:25:47,450 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 [2021-08-06 14:25:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:47,767 INFO L225 Difference]: With dead ends: 58529 [2021-08-06 14:25:47,767 INFO L226 Difference]: Without dead ends: 58529 [2021-08-06 14:25:47,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:25:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58529 states. [2021-08-06 14:25:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58529 to 58337. [2021-08-06 14:25:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58337 states, 58336 states have (on average 3.3544809380142624) internal successors, (195687), 58336 states have internal predecessors, (195687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58337 states to 58337 states and 195687 transitions. [2021-08-06 14:25:49,286 INFO L78 Accepts]: Start accepts. Automaton has 58337 states and 195687 transitions. Word has length 22 [2021-08-06 14:25:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:49,287 INFO L470 AbstractCegarLoop]: Abstraction has 58337 states and 195687 transitions. [2021-08-06 14:25:49,287 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) [2021-08-06 14:25:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 58337 states and 195687 transitions. [2021-08-06 14:25:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:49,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:49,303 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:49,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2021-08-06 14:25:49,503 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 [2021-08-06 14:25:49,504 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:49,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:49,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1107333072, now seen corresponding path program 225 times [2021-08-06 14:25:49,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:49,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409673455] [2021-08-06 14:25:49,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:49,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:49,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:49,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409673455] [2021-08-06 14:25:49,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409673455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:49,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009844667] [2021-08-06 14:25:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:49,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:49,624 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) [2021-08-06 14:25:49,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-06 14:25:51,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:25:51,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:51,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:51,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009844667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:51,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:51,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:25:51,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933459070] [2021-08-06 14:25:51,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:51,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:51,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:51,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:51,901 INFO L87 Difference]: Start difference. First operand 58337 states and 195687 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) [2021-08-06 14:25:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:52,450 INFO L93 Difference]: Finished difference Result 58540 states and 196035 transitions. [2021-08-06 14:25:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:25:52,451 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 [2021-08-06 14:25:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:52,643 INFO L225 Difference]: With dead ends: 58540 [2021-08-06 14:25:52,644 INFO L226 Difference]: Without dead ends: 58540 [2021-08-06 14:25:52,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:25:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58540 states. [2021-08-06 14:25:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58540 to 58340. [2021-08-06 14:25:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58340 states, 58339 states have (on average 3.3544455681448087) internal successors, (195695), 58339 states have internal predecessors, (195695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58340 states to 58340 states and 195695 transitions. [2021-08-06 14:25:54,495 INFO L78 Accepts]: Start accepts. Automaton has 58340 states and 195695 transitions. Word has length 22 [2021-08-06 14:25:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:54,496 INFO L470 AbstractCegarLoop]: Abstraction has 58340 states and 195695 transitions. [2021-08-06 14:25:54,496 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) [2021-08-06 14:25:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 58340 states and 195695 transitions. [2021-08-06 14:25:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:54,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:54,510 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:54,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2021-08-06 14:25:54,710 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 [2021-08-06 14:25:54,711 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1376079500, now seen corresponding path program 226 times [2021-08-06 14:25:54,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:54,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35315773] [2021-08-06 14:25:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:54,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:54,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:54,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35315773] [2021-08-06 14:25:54,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35315773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:54,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453103163] [2021-08-06 14:25:54,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:54,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:54,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:54,834 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) [2021-08-06 14:25:54,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-06 14:25:56,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:56,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:25:56,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:57,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453103163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:57,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:57,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:25:57,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602796935] [2021-08-06 14:25:57,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:57,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:57,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:57,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:57,020 INFO L87 Difference]: Start difference. First operand 58340 states and 195695 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) [2021-08-06 14:25:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:57,546 INFO L93 Difference]: Finished difference Result 58647 states and 196315 transitions. [2021-08-06 14:25:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:25:57,546 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 [2021-08-06 14:25:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:57,736 INFO L225 Difference]: With dead ends: 58647 [2021-08-06 14:25:57,736 INFO L226 Difference]: Without dead ends: 58647 [2021-08-06 14:25:57,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:25:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58647 states. [2021-08-06 14:25:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58647 to 58343. [2021-08-06 14:25:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58343 states, 58342 states have (on average 3.3544102019128585) internal successors, (195703), 58342 states have internal predecessors, (195703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58343 states to 58343 states and 195703 transitions. [2021-08-06 14:25:59,671 INFO L78 Accepts]: Start accepts. Automaton has 58343 states and 195703 transitions. Word has length 22 [2021-08-06 14:25:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:59,671 INFO L470 AbstractCegarLoop]: Abstraction has 58343 states and 195703 transitions. [2021-08-06 14:25:59,671 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) [2021-08-06 14:25:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 58343 states and 195703 transitions. [2021-08-06 14:25:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:59,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:59,691 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:59,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:59,916 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 [2021-08-06 14:25:59,917 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1117284176, now seen corresponding path program 227 times [2021-08-06 14:25:59,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:59,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814628863] [2021-08-06 14:25:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:59,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:00,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:00,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814628863] [2021-08-06 14:26:00,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814628863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:00,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724100274] [2021-08-06 14:26:00,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:00,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:00,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:00,069 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) [2021-08-06 14:26:00,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-06 14:26:02,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:26:02,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:26:02,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:02,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724100274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:02,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:02,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:26:02,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983047570] [2021-08-06 14:26:02,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:02,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:02,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:02,203 INFO L87 Difference]: Start difference. First operand 58343 states and 195703 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) [2021-08-06 14:26:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:02,861 INFO L93 Difference]: Finished difference Result 58907 states and 197056 transitions. [2021-08-06 14:26:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:26:02,861 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 [2021-08-06 14:26:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:03,063 INFO L225 Difference]: With dead ends: 58907 [2021-08-06 14:26:03,064 INFO L226 Difference]: Without dead ends: 58907 [2021-08-06 14:26:03,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 315.6ms TimeCoverageRelationStatistics Valid=517, Invalid=1043, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:26:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58907 states. [2021-08-06 14:26:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58907 to 58347. [2021-08-06 14:26:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58347 states, 58346 states have (on average 3.354368765639461) internal successors, (195714), 58346 states have internal predecessors, (195714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58347 states to 58347 states and 195714 transitions. [2021-08-06 14:26:04,691 INFO L78 Accepts]: Start accepts. Automaton has 58347 states and 195714 transitions. Word has length 22 [2021-08-06 14:26:04,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:04,691 INFO L470 AbstractCegarLoop]: Abstraction has 58347 states and 195714 transitions. [2021-08-06 14:26:04,691 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) [2021-08-06 14:26:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 58347 states and 195714 transitions. [2021-08-06 14:26:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:26:04,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:04,707 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:04,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2021-08-06 14:26:04,907 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 [2021-08-06 14:26:04,908 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1684563724, now seen corresponding path program 228 times [2021-08-06 14:26:04,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:04,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850619059] [2021-08-06 14:26:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:04,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:05,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:05,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850619059] [2021-08-06 14:26:05,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850619059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264906190] [2021-08-06 14:26:05,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:05,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:05,337 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) [2021-08-06 14:26:05,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-06 14:26:07,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:26:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:26:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:07,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264906190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:07,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:07,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 14:26:07,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093817459] [2021-08-06 14:26:07,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:07,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:07,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:07,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:07,428 INFO L87 Difference]: Start difference. First operand 58347 states and 195714 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) [2021-08-06 14:26:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:08,076 INFO L93 Difference]: Finished difference Result 59261 states and 198117 transitions. [2021-08-06 14:26:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 14:26:08,077 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 [2021-08-06 14:26:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:08,256 INFO L225 Difference]: With dead ends: 59261 [2021-08-06 14:26:08,256 INFO L226 Difference]: Without dead ends: 59261 [2021-08-06 14:26:08,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 361.3ms TimeCoverageRelationStatistics Valid=586, Invalid=1136, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 14:26:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59261 states. [2021-08-06 14:26:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59261 to 58344. [2021-08-06 14:26:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58344 states, 58343 states have (on average 3.3547126476183946) internal successors, (195724), 58343 states have internal predecessors, (195724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58344 states to 58344 states and 195724 transitions. [2021-08-06 14:26:09,725 INFO L78 Accepts]: Start accepts. Automaton has 58344 states and 195724 transitions. Word has length 22 [2021-08-06 14:26:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:09,725 INFO L470 AbstractCegarLoop]: Abstraction has 58344 states and 195724 transitions. [2021-08-06 14:26:09,726 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) [2021-08-06 14:26:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 58344 states and 195724 transitions. [2021-08-06 14:26:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:26:09,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:09,741 INFO L512 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:09,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2021-08-06 14:26:09,941 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 [2021-08-06 14:26:09,941 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:09,942 INFO L82 PathProgramCache]: Analyzing trace with hash 354022471, now seen corresponding path program 229 times [2021-08-06 14:26:09,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:09,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555835165] [2021-08-06 14:26:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:09,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:10,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:10,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555835165] [2021-08-06 14:26:10,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555835165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:10,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706120531] [2021-08-06 14:26:10,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:10,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:10,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:10,318 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) [2021-08-06 14:26:10,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-06 14:26:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:12,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:26:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:26:12,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706120531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:12,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:12,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-08-06 14:26:12,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646860957] [2021-08-06 14:26:12,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:12,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:12,410 INFO L87 Difference]: Start difference. First operand 58344 states and 195724 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) [2021-08-06 14:26:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:12,975 INFO L93 Difference]: Finished difference Result 58545 states and 196006 transitions. [2021-08-06 14:26:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:26:12,975 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 [2021-08-06 14:26:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:13,159 INFO L225 Difference]: With dead ends: 58545 [2021-08-06 14:26:13,159 INFO L226 Difference]: Without dead ends: 58542 [2021-08-06 14:26:13,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 408.8ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:26:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58542 states. [2021-08-06 14:26:14,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58542 to 58338. [2021-08-06 14:26:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58338 states, 58337 states have (on average 3.3514579083600458) internal successors, (195514), 58337 states have internal predecessors, (195514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58338 states to 58338 states and 195514 transitions. [2021-08-06 14:26:14,647 INFO L78 Accepts]: Start accepts. Automaton has 58338 states and 195514 transitions. Word has length 23 [2021-08-06 14:26:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:14,647 INFO L470 AbstractCegarLoop]: Abstraction has 58338 states and 195514 transitions. [2021-08-06 14:26:14,647 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) [2021-08-06 14:26:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 58338 states and 195514 transitions. [2021-08-06 14:26:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:26:14,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:14,662 INFO L512 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:14,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:14,863 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 [2021-08-06 14:26:14,863 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:14,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:14,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1098724969, now seen corresponding path program 230 times [2021-08-06 14:26:14,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:14,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003773593] [2021-08-06 14:26:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:14,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:14,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:14,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003773593] [2021-08-06 14:26:14,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003773593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:14,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829765845] [2021-08-06 14:26:14,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:14,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:14,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:14,973 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) [2021-08-06 14:26:14,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-06 14:26:17,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:17,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:26:17,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:26:17,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829765845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:17,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:17,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-06 14:26:17,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765025918] [2021-08-06 14:26:17,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:17,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:17,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:17,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:17,295 INFO L87 Difference]: Start difference. First operand 58338 states and 195514 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) [2021-08-06 14:26:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:17,784 INFO L93 Difference]: Finished difference Result 58541 states and 195801 transitions. [2021-08-06 14:26:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:26:17,784 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 [2021-08-06 14:26:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:18,087 INFO L225 Difference]: With dead ends: 58541 [2021-08-06 14:26:18,087 INFO L226 Difference]: Without dead ends: 58538 [2021-08-06 14:26:18,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:26:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58538 states. [2021-08-06 14:26:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58538 to 58338. [2021-08-06 14:26:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58338 states, 58337 states have (on average 3.3513207741227693) internal successors, (195506), 58337 states have internal predecessors, (195506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58338 states to 58338 states and 195506 transitions. [2021-08-06 14:26:19,507 INFO L78 Accepts]: Start accepts. Automaton has 58338 states and 195506 transitions. Word has length 23 [2021-08-06 14:26:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:19,507 INFO L470 AbstractCegarLoop]: Abstraction has 58338 states and 195506 transitions. [2021-08-06 14:26:19,507 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) [2021-08-06 14:26:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 58338 states and 195506 transitions. [2021-08-06 14:26:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:26:19,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:19,523 INFO L512 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:19,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:19,723 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 [2021-08-06 14:26:19,723 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:19,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:19,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1585301369, now seen corresponding path program 231 times [2021-08-06 14:26:19,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:19,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143424237] [2021-08-06 14:26:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:19,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:19,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:19,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143424237] [2021-08-06 14:26:19,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143424237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:19,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546645089] [2021-08-06 14:26:19,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:19,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:19,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:19,842 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) [2021-08-06 14:26:19,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-06 14:26:22,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:26:22,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 14:26:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:26:22,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546645089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:22,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:22,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-08-06 14:26:22,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164397189] [2021-08-06 14:26:22,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 14:26:22,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:22,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 14:26:22,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:26:22,341 INFO L87 Difference]: Start difference. First operand 58338 states and 195506 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:24,115 INFO L93 Difference]: Finished difference Result 67592 states and 222742 transitions. [2021-08-06 14:26:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-06 14:26:24,115 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:26:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:24,330 INFO L225 Difference]: With dead ends: 67592 [2021-08-06 14:26:24,330 INFO L226 Difference]: Without dead ends: 67586 [2021-08-06 14:26:24,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3744 ImplicationChecksByTransitivity, 1189.7ms TimeCoverageRelationStatistics Valid=1023, Invalid=10319, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 14:26:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67586 states. [2021-08-06 14:26:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67586 to 59060. [2021-08-06 14:26:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59060 states, 59059 states have (on average 3.3446045479943787) internal successors, (197529), 59059 states have internal predecessors, (197529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59060 states to 59060 states and 197529 transitions. [2021-08-06 14:26:26,194 INFO L78 Accepts]: Start accepts. Automaton has 59060 states and 197529 transitions. Word has length 23 [2021-08-06 14:26:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:26,194 INFO L470 AbstractCegarLoop]: Abstraction has 59060 states and 197529 transitions. [2021-08-06 14:26:26,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 59060 states and 197529 transitions. [2021-08-06 14:26:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:26,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:26,215 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:26,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:26,415 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 [2021-08-06 14:26:26,416 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash 47553986, now seen corresponding path program 232 times [2021-08-06 14:26:26,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:26,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147827095] [2021-08-06 14:26:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:26,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:26,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:26,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147827095] [2021-08-06 14:26:26,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147827095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:26,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987480546] [2021-08-06 14:26:26,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:26,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:26,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:26,572 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) [2021-08-06 14:26:26,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-06 14:26:28,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:28,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:28,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:26:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:28,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987480546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:28,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:28,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-08-06 14:26:28,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11534996] [2021-08-06 14:26:28,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:28,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:28,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:28,869 INFO L87 Difference]: Start difference. First operand 59060 states and 197529 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) [2021-08-06 14:26:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:29,362 INFO L93 Difference]: Finished difference Result 59371 states and 198257 transitions. [2021-08-06 14:26:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:26:29,362 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 24 [2021-08-06 14:26:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:29,571 INFO L225 Difference]: With dead ends: 59371 [2021-08-06 14:26:29,572 INFO L226 Difference]: Without dead ends: 59362 [2021-08-06 14:26:29,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:26:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59362 states. [2021-08-06 14:26:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59362 to 59062. [2021-08-06 14:26:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59062 states, 59061 states have (on average 3.34450822031459) internal successors, (197530), 59061 states have internal predecessors, (197530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59062 states to 59062 states and 197530 transitions. [2021-08-06 14:26:31,359 INFO L78 Accepts]: Start accepts. Automaton has 59062 states and 197530 transitions. Word has length 24 [2021-08-06 14:26:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:31,359 INFO L470 AbstractCegarLoop]: Abstraction has 59062 states and 197530 transitions. [2021-08-06 14:26:31,360 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) [2021-08-06 14:26:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 59062 states and 197530 transitions. [2021-08-06 14:26:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:31,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:31,380 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:31,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2021-08-06 14:26:31,581 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 [2021-08-06 14:26:31,581 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash -374931740, now seen corresponding path program 233 times [2021-08-06 14:26:31,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:31,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459925698] [2021-08-06 14:26:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:31,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 44 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:31,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:31,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459925698] [2021-08-06 14:26:31,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459925698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:31,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588476057] [2021-08-06 14:26:31,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:31,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:31,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:31,721 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) [2021-08-06 14:26:31,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-06 14:26:33,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 14:26:33,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:33,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:26:33,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 58 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:34,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588476057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:34,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:34,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-08-06 14:26:34,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946542510] [2021-08-06 14:26:34,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:34,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:34,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:34,014 INFO L87 Difference]: Start difference. First operand 59062 states and 197530 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) [2021-08-06 14:26:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:34,537 INFO L93 Difference]: Finished difference Result 59337 states and 198211 transitions. [2021-08-06 14:26:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:26:34,547 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 24 [2021-08-06 14:26:34,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:34,760 INFO L225 Difference]: With dead ends: 59337 [2021-08-06 14:26:34,761 INFO L226 Difference]: Without dead ends: 59331 [2021-08-06 14:26:34,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:26:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59331 states. [2021-08-06 14:26:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59331 to 59064. [2021-08-06 14:26:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59064 states, 59063 states have (on average 3.3444118991585254) internal successors, (197531), 59063 states have internal predecessors, (197531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59064 states to 59064 states and 197531 transitions. [2021-08-06 14:26:36,568 INFO L78 Accepts]: Start accepts. Automaton has 59064 states and 197531 transitions. Word has length 24 [2021-08-06 14:26:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:36,568 INFO L470 AbstractCegarLoop]: Abstraction has 59064 states and 197531 transitions. [2021-08-06 14:26:36,568 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) [2021-08-06 14:26:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 59064 states and 197531 transitions. [2021-08-06 14:26:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:36,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:36,590 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:36,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:36,790 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 [2021-08-06 14:26:36,791 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:36,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:36,791 INFO L82 PathProgramCache]: Analyzing trace with hash -112899566, now seen corresponding path program 234 times [2021-08-06 14:26:36,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:36,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637220689] [2021-08-06 14:26:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:36,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:26:36,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:36,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637220689] [2021-08-06 14:26:36,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637220689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:36,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016670316] [2021-08-06 14:26:36,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:36,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:36,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:36,919 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) [2021-08-06 14:26:36,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-06 14:26:39,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 14:26:39,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:39,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:26:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:39,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016670316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:39,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:39,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:26:39,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382018104] [2021-08-06 14:26:39,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:39,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:39,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:39,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:39,206 INFO L87 Difference]: Start difference. First operand 59064 states and 197531 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) [2021-08-06 14:26:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:39,595 INFO L93 Difference]: Finished difference Result 59318 states and 197879 transitions. [2021-08-06 14:26:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:26:39,595 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 24 [2021-08-06 14:26:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:39,791 INFO L225 Difference]: With dead ends: 59318 [2021-08-06 14:26:39,791 INFO L226 Difference]: Without dead ends: 59316 [2021-08-06 14:26:39,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=130, Invalid=176, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59316 states. [2021-08-06 14:26:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59316 to 59031. [2021-08-06 14:26:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59031 states, 59030 states have (on average 3.3435033034050483) internal successors, (197367), 59030 states have internal predecessors, (197367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59031 states to 59031 states and 197367 transitions. [2021-08-06 14:26:41,652 INFO L78 Accepts]: Start accepts. Automaton has 59031 states and 197367 transitions. Word has length 24 [2021-08-06 14:26:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:41,652 INFO L470 AbstractCegarLoop]: Abstraction has 59031 states and 197367 transitions. [2021-08-06 14:26:41,652 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) [2021-08-06 14:26:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 59031 states and 197367 transitions. [2021-08-06 14:26:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:41,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:41,676 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:41,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:41,877 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 [2021-08-06 14:26:41,877 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:41,878 INFO L82 PathProgramCache]: Analyzing trace with hash 796023844, now seen corresponding path program 235 times [2021-08-06 14:26:41,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:41,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641892684] [2021-08-06 14:26:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:41,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:26:41,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:41,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641892684] [2021-08-06 14:26:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641892684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:41,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610511278] [2021-08-06 14:26:41,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:41,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:41,986 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) [2021-08-06 14:26:41,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-06 14:26:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:26:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 56 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:44,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610511278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:44,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:44,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-08-06 14:26:44,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457372014] [2021-08-06 14:26:44,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:44,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:44,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:44,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:44,278 INFO L87 Difference]: Start difference. First operand 59031 states and 197367 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) [2021-08-06 14:26:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:44,671 INFO L93 Difference]: Finished difference Result 59256 states and 197583 transitions. [2021-08-06 14:26:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:26:44,671 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 24 [2021-08-06 14:26:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:44,852 INFO L225 Difference]: With dead ends: 59256 [2021-08-06 14:26:44,852 INFO L226 Difference]: Without dead ends: 59256 [2021-08-06 14:26:44,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:26:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59256 states. [2021-08-06 14:26:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59256 to 59011. [2021-08-06 14:26:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59011 states, 59010 states have (on average 3.3416370106761564) internal successors, (197190), 59010 states have internal predecessors, (197190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59011 states to 59011 states and 197190 transitions. [2021-08-06 14:26:46,681 INFO L78 Accepts]: Start accepts. Automaton has 59011 states and 197190 transitions. Word has length 24 [2021-08-06 14:26:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:46,682 INFO L470 AbstractCegarLoop]: Abstraction has 59011 states and 197190 transitions. [2021-08-06 14:26:46,682 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) [2021-08-06 14:26:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 59011 states and 197190 transitions. [2021-08-06 14:26:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:46,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:46,707 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:46,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:46,907 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 [2021-08-06 14:26:46,908 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1651330498, now seen corresponding path program 236 times [2021-08-06 14:26:46,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:46,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450766673] [2021-08-06 14:26:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:46,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:47,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:47,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450766673] [2021-08-06 14:26:47,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450766673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:47,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502787051] [2021-08-06 14:26:47,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:47,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:47,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:47,022 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) [2021-08-06 14:26:47,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-06 14:26:49,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:49,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:26:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 58 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:26:49,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502787051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:49,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:49,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-08-06 14:26:49,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734283540] [2021-08-06 14:26:49,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:49,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:49,226 INFO L87 Difference]: Start difference. First operand 59011 states and 197190 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:49,664 INFO L93 Difference]: Finished difference Result 59230 states and 197302 transitions. [2021-08-06 14:26:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:26:49,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 24 [2021-08-06 14:26:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:49,860 INFO L225 Difference]: With dead ends: 59230 [2021-08-06 14:26:49,860 INFO L226 Difference]: Without dead ends: 59230 [2021-08-06 14:26:49,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:26:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59230 states. [2021-08-06 14:26:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59230 to 59003. [2021-08-06 14:26:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59003 states, 59002 states have (on average 3.3382766685875054) internal successors, (196965), 59002 states have internal predecessors, (196965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59003 states to 59003 states and 196965 transitions. [2021-08-06 14:26:51,428 INFO L78 Accepts]: Start accepts. Automaton has 59003 states and 196965 transitions. Word has length 24 [2021-08-06 14:26:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:51,428 INFO L470 AbstractCegarLoop]: Abstraction has 59003 states and 196965 transitions. [2021-08-06 14:26:51,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 59003 states and 196965 transitions. [2021-08-06 14:26:51,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:51,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:51,448 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:51,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2021-08-06 14:26:51,648 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 [2021-08-06 14:26:51,649 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:51,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1898934300, now seen corresponding path program 237 times [2021-08-06 14:26:51,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:51,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421429892] [2021-08-06 14:26:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:51,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:26:52,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:52,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421429892] [2021-08-06 14:26:52,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421429892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:52,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535292245] [2021-08-06 14:26:52,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:52,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:52,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:52,057 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) [2021-08-06 14:26:52,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-06 14:26:54,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 14:26:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:54,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:26:54,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:26:54,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535292245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:54,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:54,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-06 14:26:54,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582205504] [2021-08-06 14:26:54,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:54,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:54,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:54,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:54,260 INFO L87 Difference]: Start difference. First operand 59003 states and 196965 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:54,784 INFO L93 Difference]: Finished difference Result 59222 states and 197270 transitions. [2021-08-06 14:26:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:26:54,785 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 24 [2021-08-06 14:26:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:54,972 INFO L225 Difference]: With dead ends: 59222 [2021-08-06 14:26:54,972 INFO L226 Difference]: Without dead ends: 59218 [2021-08-06 14:26:54,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:26:55,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59218 states. [2021-08-06 14:26:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59218 to 58991. [2021-08-06 14:26:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58991 states, 58990 states have (on average 3.3339549076114596) internal successors, (196670), 58990 states have internal predecessors, (196670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58991 states to 58991 states and 196670 transitions. [2021-08-06 14:26:56,532 INFO L78 Accepts]: Start accepts. Automaton has 58991 states and 196670 transitions. Word has length 24 [2021-08-06 14:26:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:56,532 INFO L470 AbstractCegarLoop]: Abstraction has 58991 states and 196670 transitions. [2021-08-06 14:26:56,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 58991 states and 196670 transitions. [2021-08-06 14:26:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:56,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:56,554 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:56,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:56,754 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 [2021-08-06 14:26:56,754 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:56,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:56,754 INFO L82 PathProgramCache]: Analyzing trace with hash -287993342, now seen corresponding path program 238 times [2021-08-06 14:26:56,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:56,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972536921] [2021-08-06 14:26:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:56,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 31 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:57,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:57,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972536921] [2021-08-06 14:26:57,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972536921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:57,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060539377] [2021-08-06 14:26:57,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:57,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:57,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:57,183 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) [2021-08-06 14:26:57,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-06 14:26:59,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:59,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:59,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:26:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 50 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:59,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060539377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:59,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:59,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-08-06 14:26:59,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316111000] [2021-08-06 14:26:59,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:59,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:59,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:59,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:59,384 INFO L87 Difference]: Start difference. First operand 58991 states and 196670 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) [2021-08-06 14:26:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:59,856 INFO L93 Difference]: Finished difference Result 59212 states and 196981 transitions. [2021-08-06 14:26:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:26:59,856 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 24 [2021-08-06 14:26:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:00,042 INFO L225 Difference]: With dead ends: 59212 [2021-08-06 14:27:00,042 INFO L226 Difference]: Without dead ends: 59209 [2021-08-06 14:27:00,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:27:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59209 states. [2021-08-06 14:27:01,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59209 to 58991. [2021-08-06 14:27:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58991 states, 58990 states have (on average 3.333802339379556) internal successors, (196661), 58990 states have internal predecessors, (196661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58991 states to 58991 states and 196661 transitions. [2021-08-06 14:27:01,621 INFO L78 Accepts]: Start accepts. Automaton has 58991 states and 196661 transitions. Word has length 24 [2021-08-06 14:27:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:01,622 INFO L470 AbstractCegarLoop]: Abstraction has 58991 states and 196661 transitions. [2021-08-06 14:27:01,622 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) [2021-08-06 14:27:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 58991 states and 196661 transitions. [2021-08-06 14:27:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:01,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:01,645 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:01,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2021-08-06 14:27:01,845 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 [2021-08-06 14:27:01,846 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1888431196, now seen corresponding path program 239 times [2021-08-06 14:27:01,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:01,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994514661] [2021-08-06 14:27:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:01,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:02,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:02,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994514661] [2021-08-06 14:27:02,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994514661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:02,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705921838] [2021-08-06 14:27:02,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:27:02,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:02,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:02,276 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) [2021-08-06 14:27:02,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-06 14:27:04,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 14:27:04,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:04,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:27:04,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:04,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705921838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:04,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:04,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 14:27:04,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084033125] [2021-08-06 14:27:04,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:04,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:04,474 INFO L87 Difference]: Start difference. First operand 58991 states and 196661 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:04,990 INFO L93 Difference]: Finished difference Result 59358 states and 197517 transitions. [2021-08-06 14:27:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:27:04,990 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 24 [2021-08-06 14:27:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:05,175 INFO L225 Difference]: With dead ends: 59358 [2021-08-06 14:27:05,175 INFO L226 Difference]: Without dead ends: 59353 [2021-08-06 14:27:05,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:27:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59353 states. [2021-08-06 14:27:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59353 to 58991. [2021-08-06 14:27:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58991 states, 58990 states have (on average 3.333785387353789) internal successors, (196660), 58990 states have internal predecessors, (196660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58991 states to 58991 states and 196660 transitions. [2021-08-06 14:27:06,746 INFO L78 Accepts]: Start accepts. Automaton has 58991 states and 196660 transitions. Word has length 24 [2021-08-06 14:27:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:06,746 INFO L470 AbstractCegarLoop]: Abstraction has 58991 states and 196660 transitions. [2021-08-06 14:27:06,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 58991 states and 196660 transitions. [2021-08-06 14:27:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:06,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:06,766 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:06,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2021-08-06 14:27:06,967 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 [2021-08-06 14:27:06,967 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:06,967 INFO L82 PathProgramCache]: Analyzing trace with hash 37602882, now seen corresponding path program 240 times [2021-08-06 14:27:06,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:06,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396185493] [2021-08-06 14:27:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:06,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:07,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:07,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396185493] [2021-08-06 14:27:07,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396185493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:07,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453790227] [2021-08-06 14:27:07,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:27:07,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:07,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:07,416 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) [2021-08-06 14:27:07,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-06 14:27:09,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 14:27:09,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:09,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:27:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:09,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453790227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:09,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:09,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-06 14:27:09,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629469672] [2021-08-06 14:27:09,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:09,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:09,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:09,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:09,612 INFO L87 Difference]: Start difference. First operand 58991 states and 196660 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:10,106 INFO L93 Difference]: Finished difference Result 59350 states and 197507 transitions. [2021-08-06 14:27:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:27:10,106 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 24 [2021-08-06 14:27:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:10,304 INFO L225 Difference]: With dead ends: 59350 [2021-08-06 14:27:10,305 INFO L226 Difference]: Without dead ends: 59345 [2021-08-06 14:27:10,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:27:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59345 states. [2021-08-06 14:27:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59345 to 58991. [2021-08-06 14:27:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58991 states, 58990 states have (on average 3.3337684353280217) internal successors, (196659), 58990 states have internal predecessors, (196659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58991 states to 58991 states and 196659 transitions. [2021-08-06 14:27:11,853 INFO L78 Accepts]: Start accepts. Automaton has 58991 states and 196659 transitions. Word has length 24 [2021-08-06 14:27:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:11,853 INFO L470 AbstractCegarLoop]: Abstraction has 58991 states and 196659 transitions. [2021-08-06 14:27:11,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 58991 states and 196659 transitions. [2021-08-06 14:27:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:11,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:11,876 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:11,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2021-08-06 14:27:12,077 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 [2021-08-06 14:27:12,077 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash -384882844, now seen corresponding path program 241 times [2021-08-06 14:27:12,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:12,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307578269] [2021-08-06 14:27:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:12,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:12,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:12,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307578269] [2021-08-06 14:27:12,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307578269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:12,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830205303] [2021-08-06 14:27:12,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:27:12,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:12,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:12,473 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) [2021-08-06 14:27:12,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-06 14:27:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:14,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:27:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 53 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:27:14,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830205303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:14,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:14,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-08-06 14:27:14,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754813100] [2021-08-06 14:27:14,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:14,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:14,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:14,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:14,697 INFO L87 Difference]: Start difference. First operand 58991 states and 196659 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) [2021-08-06 14:27:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:15,178 INFO L93 Difference]: Finished difference Result 59339 states and 197493 transitions. [2021-08-06 14:27:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:27:15,178 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 24 [2021-08-06 14:27:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:15,365 INFO L225 Difference]: With dead ends: 59339 [2021-08-06 14:27:15,365 INFO L226 Difference]: Without dead ends: 59333 [2021-08-06 14:27:15,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:27:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59333 states.