/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/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 16:03:03,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 16:03:03,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 16:03:03,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 16:03:03,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-28 16:03:03,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-28 16:03:03,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-28 16:03:03,983 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 [2022-01-28 16:03:04,008 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 16:03:04,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 16:03:04,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 16:03:04,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 16:03:04,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 16:03:04,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 16:03:04,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 16:03:04,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 16:03:04,010 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 16:03:04,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 16:03:04,010 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 16:03:04,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 16:03:04,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 16:03:04,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 16:03:04,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 16:03:04,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 16:03:04,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 16:03:04,011 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 16:03:04,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 16:03:04,011 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 16:03:04,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 16:03:04,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 16:03:04,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 16:03:04,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 16:03:04,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 16:03:04,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 16:03:04,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 16:03:04,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 16:03:04,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 16:03:04,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 16:03:04,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 16:03:04,013 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 16:03:04,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 16:03:04,013 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 16:03:04,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 16:03:04,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 16:03:04,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 16:03:04,192 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 16:03:04,194 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 16:03:04,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl [2022-01-28 16:03:04,195 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl' [2022-01-28 16:03:04,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 16:03:04,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 16:03:04,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 16:03:04,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 16:03:04,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 16:03:04,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,241 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 16:03:04,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 16:03:04,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 16:03:04,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 16:03:04,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 16:03:04,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 16:03:04,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 16:03:04,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 16:03:04,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 16:03:04,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/1) ... [2022-01-28 16:03:04,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 16:03:04,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:04,293 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) [2022-01-28 16:03:04,303 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 [2022-01-28 16:03:04,333 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 16:03:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 16:03:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 16:03:04,333 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 16:03:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 16:03:04,334 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 16:03:04,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 16:03:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 16:03:04,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 16:03:04,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 16:03:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 16:03:04,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 16:03:04,336 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-28 16:03:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-28 16:03:04,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-28 16:03:04,338 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 16:03:04,375 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 16:03:04,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 16:03:04,469 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 16:03:04,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 16:03:04,495 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 16:03:04,496 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:03:04 BoogieIcfgContainer [2022-01-28 16:03:04,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 16:03:04,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 16:03:04,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 16:03:04,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 16:03:04,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 04:03:04" (1/2) ... [2022-01-28 16:03:04,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15457f48 and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:03:04, skipping insertion in model container [2022-01-28 16:03:04,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:03:04" (2/2) ... [2022-01-28 16:03:04,517 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2022-01-28 16:03:04,520 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 16:03:04,520 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 16:03:04,520 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 16:03:04,520 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 16:03:04,572 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-28 16:03:04,601 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 16:03:04,606 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, mAutomataTypeConcurrency=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 [2022-01-28 16:03:04,606 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-28 16:03:04,622 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-01-28 16:03:04,717 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:04,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 16:03:04,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:04,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:04,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash 792171695, now seen corresponding path program 1 times [2022-01-28 16:03:04,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:04,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725430765] [2022-01-28 16:03:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:04,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:04,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:04,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725430765] [2022-01-28 16:03:04,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725430765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 16:03:04,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 16:03:04,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 16:03:04,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615313480] [2022-01-28 16:03:04,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:04,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 16:03:04,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:04,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 16:03:04,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 16:03:04,880 INFO L87 Difference]: Start difference. First operand has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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 7.0) internal successors, (21), 3 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) [2022-01-28 16:03:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:04,968 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2022-01-28 16:03:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 16:03:04,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 16:03:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:04,984 INFO L225 Difference]: With dead ends: 856 [2022-01-28 16:03:04,984 INFO L226 Difference]: Without dead ends: 731 [2022-01-28 16:03:04,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 16:03:04,988 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:04,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-28 16:03:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2022-01-28 16:03:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7241379310344827) internal successors, (2592), 696 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2022-01-28 16:03:05,128 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2022-01-28 16:03:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:05,129 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2022-01-28 16:03:05,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2022-01-28 16:03:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2022-01-28 16:03:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 16:03:05,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:05,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:05,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 16:03:05,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:05,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1463348563, now seen corresponding path program 1 times [2022-01-28 16:03:05,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:05,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709645348] [2022-01-28 16:03:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:05,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:05,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:05,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709645348] [2022-01-28 16:03:05,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709645348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:05,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642538867] [2022-01-28 16:03:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:05,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:05,282 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) [2022-01-28 16:03:05,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 16:03:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:05,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 16:03:05,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:05,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:05,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642538867] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:05,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 16:03:05,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-28 16:03:05,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781288115] [2022-01-28 16:03:05,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:05,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 16:03:05,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 16:03:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-28 16:03:05,564 INFO L87 Difference]: Start difference. First operand 697 states and 2592 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:05,704 INFO L93 Difference]: Finished difference Result 1568 states and 5771 transitions. [2022-01-28 16:03:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 16:03:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-01-28 16:03:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:05,718 INFO L225 Difference]: With dead ends: 1568 [2022-01-28 16:03:05,719 INFO L226 Difference]: Without dead ends: 1568 [2022-01-28 16:03:05,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 16:03:05,720 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:05,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 73 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2022-01-28 16:03:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 817. [2022-01-28 16:03:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.7830882352941178) internal successors, (3087), 816 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 3087 transitions. [2022-01-28 16:03:05,772 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 3087 transitions. Word has length 23 [2022-01-28 16:03:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:05,773 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 3087 transitions. [2022-01-28 16:03:05,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 3087 transitions. [2022-01-28 16:03:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 16:03:05,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:05,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:05,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:05,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:05,998 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:05,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1782373011, now seen corresponding path program 1 times [2022-01-28 16:03:05,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:05,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069301704] [2022-01-28 16:03:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:05,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:06,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:06,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069301704] [2022-01-28 16:03:06,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069301704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 16:03:06,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 16:03:06,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 16:03:06,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81542794] [2022-01-28 16:03:06,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:06,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 16:03:06,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 16:03:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 16:03:06,047 INFO L87 Difference]: Start difference. First operand 817 states and 3087 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:06,122 INFO L93 Difference]: Finished difference Result 911 states and 3304 transitions. [2022-01-28 16:03:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 16:03:06,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-01-28 16:03:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:06,126 INFO L225 Difference]: With dead ends: 911 [2022-01-28 16:03:06,126 INFO L226 Difference]: Without dead ends: 801 [2022-01-28 16:03:06,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 16:03:06,127 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:06,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 48 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-28 16:03:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 785. [2022-01-28 16:03:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.7997448979591835) internal successors, (2979), 784 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2979 transitions. [2022-01-28 16:03:06,147 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2979 transitions. Word has length 23 [2022-01-28 16:03:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:06,147 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2979 transitions. [2022-01-28 16:03:06,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2979 transitions. [2022-01-28 16:03:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 16:03:06,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:06,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:06,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 16:03:06,150 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash 736027925, now seen corresponding path program 2 times [2022-01-28 16:03:06,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:06,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211862513] [2022-01-28 16:03:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:06,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:06,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:06,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211862513] [2022-01-28 16:03:06,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211862513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 16:03:06,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 16:03:06,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 16:03:06,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695540918] [2022-01-28 16:03:06,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:06,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 16:03:06,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 16:03:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 16:03:06,195 INFO L87 Difference]: Start difference. First operand 785 states and 2979 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:06,270 INFO L93 Difference]: Finished difference Result 1413 states and 5150 transitions. [2022-01-28 16:03:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 16:03:06,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-01-28 16:03:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:06,278 INFO L225 Difference]: With dead ends: 1413 [2022-01-28 16:03:06,278 INFO L226 Difference]: Without dead ends: 1413 [2022-01-28 16:03:06,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 16:03:06,282 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:06,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 75 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2022-01-28 16:03:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 869. [2022-01-28 16:03:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.743087557603687) internal successors, (3249), 868 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 3249 transitions. [2022-01-28 16:03:06,312 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 3249 transitions. Word has length 23 [2022-01-28 16:03:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:06,312 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 3249 transitions. [2022-01-28 16:03:06,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 3249 transitions. [2022-01-28 16:03:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 16:03:06,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:06,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:06,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 16:03:06,316 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2123902699, now seen corresponding path program 2 times [2022-01-28 16:03:06,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:06,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097520244] [2022-01-28 16:03:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:06,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:06,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:06,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097520244] [2022-01-28 16:03:06,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097520244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 16:03:06,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 16:03:06,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 16:03:06,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453370763] [2022-01-28 16:03:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:06,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 16:03:06,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 16:03:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 16:03:06,399 INFO L87 Difference]: Start difference. First operand 869 states and 3249 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:06,494 INFO L93 Difference]: Finished difference Result 1346 states and 4899 transitions. [2022-01-28 16:03:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 16:03:06,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-01-28 16:03:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:06,500 INFO L225 Difference]: With dead ends: 1346 [2022-01-28 16:03:06,500 INFO L226 Difference]: Without dead ends: 1310 [2022-01-28 16:03:06,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 16:03:06,504 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:06,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 81 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-01-28 16:03:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 915. [2022-01-28 16:03:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.7308533916849016) internal successors, (3410), 914 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3410 transitions. [2022-01-28 16:03:06,528 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3410 transitions. Word has length 23 [2022-01-28 16:03:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:06,529 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 3410 transitions. [2022-01-28 16:03:06,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,531 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3410 transitions. [2022-01-28 16:03:06,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 16:03:06,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:06,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:06,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 16:03:06,537 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1980678467, now seen corresponding path program 3 times [2022-01-28 16:03:06,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:06,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969774509] [2022-01-28 16:03:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:06,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:06,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969774509] [2022-01-28 16:03:06,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969774509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 16:03:06,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 16:03:06,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 16:03:06,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073459900] [2022-01-28 16:03:06,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:06,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 16:03:06,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 16:03:06,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 16:03:06,570 INFO L87 Difference]: Start difference. First operand 915 states and 3410 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:06,624 INFO L93 Difference]: Finished difference Result 1446 states and 5318 transitions. [2022-01-28 16:03:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 16:03:06,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-01-28 16:03:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:06,631 INFO L225 Difference]: With dead ends: 1446 [2022-01-28 16:03:06,631 INFO L226 Difference]: Without dead ends: 1424 [2022-01-28 16:03:06,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 16:03:06,632 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:06,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 49 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 16:03:06,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-01-28 16:03:06,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1117. [2022-01-28 16:03:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 3.8082437275985663) internal successors, (4250), 1116 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 4250 transitions. [2022-01-28 16:03:06,659 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 4250 transitions. Word has length 23 [2022-01-28 16:03:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:06,660 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 4250 transitions. [2022-01-28 16:03:06,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 4250 transitions. [2022-01-28 16:03:06,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 16:03:06,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:06,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:06,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-28 16:03:06,663 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:06,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1924327101, now seen corresponding path program 4 times [2022-01-28 16:03:06,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:06,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599362410] [2022-01-28 16:03:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:06,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:06,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:06,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599362410] [2022-01-28 16:03:06,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599362410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 16:03:06,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 16:03:06,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 16:03:06,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378498623] [2022-01-28 16:03:06,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:06,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 16:03:06,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:06,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 16:03:06,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 16:03:06,739 INFO L87 Difference]: Start difference. First operand 1117 states and 4250 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:06,782 INFO L93 Difference]: Finished difference Result 1471 states and 5538 transitions. [2022-01-28 16:03:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 16:03:06,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-01-28 16:03:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:06,788 INFO L225 Difference]: With dead ends: 1471 [2022-01-28 16:03:06,788 INFO L226 Difference]: Without dead ends: 1471 [2022-01-28 16:03:06,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 16:03:06,789 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:06,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 51 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 16:03:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-01-28 16:03:06,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1137. [2022-01-28 16:03:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.8221830985915495) internal successors, (4342), 1136 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 4342 transitions. [2022-01-28 16:03:06,814 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 4342 transitions. Word has length 23 [2022-01-28 16:03:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:06,814 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 4342 transitions. [2022-01-28 16:03:06,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 4342 transitions. [2022-01-28 16:03:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 16:03:06,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:06,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:06,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-28 16:03:06,817 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1459606317, now seen corresponding path program 1 times [2022-01-28 16:03:06,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:06,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903710271] [2022-01-28 16:03:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:06,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:06,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:06,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903710271] [2022-01-28 16:03:06,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903710271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:06,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112756931] [2022-01-28 16:03:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:06,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:06,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:06,858 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) [2022-01-28 16:03:06,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 16:03:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 16:03:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:06,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:07,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112756931] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:07,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 16:03:07,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-28 16:03:07,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766184328] [2022-01-28 16:03:07,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:07,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 16:03:07,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:07,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 16:03:07,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-28 16:03:07,042 INFO L87 Difference]: Start difference. First operand 1137 states and 4342 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:07,113 INFO L93 Difference]: Finished difference Result 1771 states and 6544 transitions. [2022-01-28 16:03:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 16:03:07,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 16:03:07,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:07,122 INFO L225 Difference]: With dead ends: 1771 [2022-01-28 16:03:07,122 INFO L226 Difference]: Without dead ends: 1692 [2022-01-28 16:03:07,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 16:03:07,123 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:07,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 60 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 16:03:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-01-28 16:03:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1058. [2022-01-28 16:03:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.7899716177861875) internal successors, (4006), 1057 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 4006 transitions. [2022-01-28 16:03:07,148 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 4006 transitions. Word has length 25 [2022-01-28 16:03:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:07,149 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 4006 transitions. [2022-01-28 16:03:07,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 4006 transitions. [2022-01-28 16:03:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 16:03:07,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:07,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:07,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:07,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-28 16:03:07,369 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash 966321903, now seen corresponding path program 2 times [2022-01-28 16:03:07,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:07,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126125646] [2022-01-28 16:03:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:07,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:07,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:07,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126125646] [2022-01-28 16:03:07,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126125646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 16:03:07,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 16:03:07,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 16:03:07,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907588913] [2022-01-28 16:03:07,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:07,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 16:03:07,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 16:03:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-28 16:03:07,412 INFO L87 Difference]: Start difference. First operand 1058 states and 4006 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:07,452 INFO L93 Difference]: Finished difference Result 1311 states and 4876 transitions. [2022-01-28 16:03:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 16:03:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 16:03:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:07,458 INFO L225 Difference]: With dead ends: 1311 [2022-01-28 16:03:07,458 INFO L226 Difference]: Without dead ends: 1311 [2022-01-28 16:03:07,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-28 16:03:07,459 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:07,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 50 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 16:03:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-01-28 16:03:07,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1077. [2022-01-28 16:03:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 3.774163568773234) internal successors, (4061), 1076 states have internal predecessors, (4061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 4061 transitions. [2022-01-28 16:03:07,482 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 4061 transitions. Word has length 25 [2022-01-28 16:03:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:07,482 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 4061 transitions. [2022-01-28 16:03:07,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 4061 transitions. [2022-01-28 16:03:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 16:03:07,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:07,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:07,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-28 16:03:07,485 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1528957573, now seen corresponding path program 1 times [2022-01-28 16:03:07,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:07,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805103416] [2022-01-28 16:03:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:07,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:07,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:07,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805103416] [2022-01-28 16:03:07,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805103416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:07,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925009175] [2022-01-28 16:03:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:07,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:07,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:07,551 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) [2022-01-28 16:03:07,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 16:03:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:07,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 16:03:07,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:07,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:07,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925009175] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:07,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 16:03:07,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2022-01-28 16:03:07,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993814327] [2022-01-28 16:03:07,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:07,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 16:03:07,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 16:03:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-28 16:03:07,698 INFO L87 Difference]: Start difference. First operand 1077 states and 4061 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:07,772 INFO L93 Difference]: Finished difference Result 1792 states and 6625 transitions. [2022-01-28 16:03:07,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 16:03:07,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 16:03:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:07,781 INFO L225 Difference]: With dead ends: 1792 [2022-01-28 16:03:07,781 INFO L226 Difference]: Without dead ends: 1750 [2022-01-28 16:03:07,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-28 16:03:07,781 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:07,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 72 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:07,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-01-28 16:03:07,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1127. [2022-01-28 16:03:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 3.7886323268206037) internal successors, (4266), 1126 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 4266 transitions. [2022-01-28 16:03:07,810 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 4266 transitions. Word has length 25 [2022-01-28 16:03:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:07,811 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 4266 transitions. [2022-01-28 16:03:07,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 4266 transitions. [2022-01-28 16:03:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-28 16:03:07,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:07,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:07,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:08,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:08,038 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:08,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:08,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1454208321, now seen corresponding path program 3 times [2022-01-28 16:03:08,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:08,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142795991] [2022-01-28 16:03:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:08,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:08,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:08,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142795991] [2022-01-28 16:03:08,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142795991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 16:03:08,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 16:03:08,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 16:03:08,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555727048] [2022-01-28 16:03:08,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:08,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 16:03:08,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 16:03:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 16:03:08,059 INFO L87 Difference]: Start difference. First operand 1127 states and 4266 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:08,117 INFO L93 Difference]: Finished difference Result 1118 states and 4210 transitions. [2022-01-28 16:03:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 16:03:08,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-28 16:03:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:08,121 INFO L225 Difference]: With dead ends: 1118 [2022-01-28 16:03:08,121 INFO L226 Difference]: Without dead ends: 938 [2022-01-28 16:03:08,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 16:03:08,122 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:08,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 69 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 16:03:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-01-28 16:03:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 858. [2022-01-28 16:03:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.8751458576429405) internal successors, (3321), 857 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2022-01-28 16:03:08,139 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2022-01-28 16:03:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:08,139 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2022-01-28 16:03:08,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2022-01-28 16:03:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 16:03:08,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:08,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:08,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-28 16:03:08,141 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash -149664725, now seen corresponding path program 1 times [2022-01-28 16:03:08,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188904367] [2022-01-28 16:03:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:08,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:08,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:08,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188904367] [2022-01-28 16:03:08,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188904367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:08,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712991948] [2022-01-28 16:03:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:08,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:08,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:08,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 16:03:08,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 16:03:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 16:03:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:08,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:08,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712991948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:08,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:08,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-01-28 16:03:08,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285780939] [2022-01-28 16:03:08,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:08,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 16:03:08,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 16:03:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 16:03:08,270 INFO L87 Difference]: Start difference. First operand 858 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2022-01-28 16:03:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:08,339 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2022-01-28 16:03:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 16:03:08,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 16:03:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:08,347 INFO L225 Difference]: With dead ends: 2765 [2022-01-28 16:03:08,347 INFO L226 Difference]: Without dead ends: 2631 [2022-01-28 16:03:08,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 16:03:08,348 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:08,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 111 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 16:03:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-01-28 16:03:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2022-01-28 16:03:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.905756495160469) internal successors, (7667), 1963 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2022-01-28 16:03:08,392 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2022-01-28 16:03:08,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:08,392 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2022-01-28 16:03:08,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2022-01-28 16:03:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2022-01-28 16:03:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 16:03:08,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:08,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:08,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:08,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:08,628 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1329540183, now seen corresponding path program 2 times [2022-01-28 16:03:08,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:08,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715332334] [2022-01-28 16:03:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:08,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 16:03:08,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715332334] [2022-01-28 16:03:08,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715332334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628994947] [2022-01-28 16:03:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:03:08,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:08,683 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) [2022-01-28 16:03:08,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 16:03:08,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:03:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 16:03:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 16:03:08,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 16:03:08,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628994947] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:08,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 16:03:08,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-28 16:03:08,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932529915] [2022-01-28 16:03:08,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 16:03:08,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 16:03:08,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 16:03:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-28 16:03:08,915 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2022-01-28 16:03:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:08,983 INFO L93 Difference]: Finished difference Result 3007 states and 11629 transitions. [2022-01-28 16:03:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 16:03:08,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 29 [2022-01-28 16:03:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:08,991 INFO L225 Difference]: With dead ends: 3007 [2022-01-28 16:03:08,992 INFO L226 Difference]: Without dead ends: 3007 [2022-01-28 16:03:08,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-28 16:03:08,992 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:08,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 64 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 16:03:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2022-01-28 16:03:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 2137. [2022-01-28 16:03:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.9307116104868913) internal successors, (8396), 2136 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2022-01-28 16:03:09,071 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2022-01-28 16:03:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:09,071 INFO L470 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2022-01-28 16:03:09,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2022-01-28 16:03:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2022-01-28 16:03:09,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 16:03:09,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:09,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:09,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:09,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-28 16:03:09,292 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:09,292 INFO L85 PathProgramCache]: Analyzing trace with hash -695147281, now seen corresponding path program 1 times [2022-01-28 16:03:09,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:09,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289294565] [2022-01-28 16:03:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:09,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:09,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:09,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289294565] [2022-01-28 16:03:09,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289294565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:09,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522142304] [2022-01-28 16:03:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:09,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:09,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:09,351 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) [2022-01-28 16:03:09,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 16:03:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:09,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 16:03:09,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:09,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:09,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522142304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:09,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:09,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-28 16:03:09,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879716641] [2022-01-28 16:03:09,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:09,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 16:03:09,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 16:03:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 16:03:09,568 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:09,651 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2022-01-28 16:03:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 16:03:09,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 16:03:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:09,659 INFO L225 Difference]: With dead ends: 2794 [2022-01-28 16:03:09,660 INFO L226 Difference]: Without dead ends: 2640 [2022-01-28 16:03:09,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-28 16:03:09,660 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 95 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:09,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 162 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2022-01-28 16:03:09,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2022-01-28 16:03:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.9431403234220137) internal successors, (7559), 1917 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2022-01-28 16:03:09,704 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2022-01-28 16:03:09,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:09,704 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2022-01-28 16:03:09,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2022-01-28 16:03:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 16:03:09,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:09,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:09,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:09,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:09,925 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:09,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:09,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1929157723, now seen corresponding path program 2 times [2022-01-28 16:03:09,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:09,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545308675] [2022-01-28 16:03:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:09,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:09,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:09,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545308675] [2022-01-28 16:03:09,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545308675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:09,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91751541] [2022-01-28 16:03:09,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:03:09,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:09,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:09,984 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) [2022-01-28 16:03:10,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 16:03:10,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:03:10,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 16:03:10,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:10,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:10,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91751541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:10,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:10,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2022-01-28 16:03:10,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127829947] [2022-01-28 16:03:10,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 16:03:10,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 16:03:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-28 16:03:10,230 INFO L87 Difference]: Start difference. First operand 1918 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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) [2022-01-28 16:03:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:10,333 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2022-01-28 16:03:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 16:03:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 16:03:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:10,348 INFO L225 Difference]: With dead ends: 5257 [2022-01-28 16:03:10,348 INFO L226 Difference]: Without dead ends: 4937 [2022-01-28 16:03:10,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-28 16:03:10,348 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 113 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:10,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 212 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2022-01-28 16:03:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2022-01-28 16:03:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.980213089802131) internal successors, (10460), 2628 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2022-01-28 16:03:10,454 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2022-01-28 16:03:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:10,455 INFO L470 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2022-01-28 16:03:10,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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) [2022-01-28 16:03:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2022-01-28 16:03:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 16:03:10,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:10,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:10,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-28 16:03:10,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:10,676 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:10,676 INFO L85 PathProgramCache]: Analyzing trace with hash -638022169, now seen corresponding path program 3 times [2022-01-28 16:03:10,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:10,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906121149] [2022-01-28 16:03:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:10,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:10,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:10,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906121149] [2022-01-28 16:03:10,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906121149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:10,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48936095] [2022-01-28 16:03:10,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 16:03:10,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:10,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:10,719 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) [2022-01-28 16:03:10,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 16:03:10,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 16:03:10,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:10,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 16:03:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:10,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:10,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48936095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:10,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:10,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-01-28 16:03:10,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45350801] [2022-01-28 16:03:10,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:10,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 16:03:10,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 16:03:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-28 16:03:10,928 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:11,800 INFO L93 Difference]: Finished difference Result 13022 states and 49751 transitions. [2022-01-28 16:03:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-28 16:03:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-28 16:03:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:11,871 INFO L225 Difference]: With dead ends: 13022 [2022-01-28 16:03:11,872 INFO L226 Difference]: Without dead ends: 12499 [2022-01-28 16:03:11,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=705, Invalid=2717, Unknown=0, NotChecked=0, Total=3422 [2022-01-28 16:03:11,873 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 675 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:11,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 326 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 16:03:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2022-01-28 16:03:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 5776. [2022-01-28 16:03:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 4.045367965367966) internal successors, (23362), 5775 states have internal predecessors, (23362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2022-01-28 16:03:12,026 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2022-01-28 16:03:12,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:12,026 INFO L470 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2022-01-28 16:03:12,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2022-01-28 16:03:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 16:03:12,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:12,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:12,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:12,255 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,SelfDestructingSolverStorable15 [2022-01-28 16:03:12,256 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash -871799379, now seen corresponding path program 4 times [2022-01-28 16:03:12,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:12,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491074615] [2022-01-28 16:03:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:12,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:12,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491074615] [2022-01-28 16:03:12,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491074615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403272466] [2022-01-28 16:03:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 16:03:12,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:12,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:12,302 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) [2022-01-28 16:03:12,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 16:03:12,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 16:03:12,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:12,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 16:03:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:12,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:12,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403272466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:12,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:12,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-01-28 16:03:12,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041975907] [2022-01-28 16:03:12,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:12,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 16:03:12,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:12,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 16:03:12,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-28 16:03:12,554 INFO L87 Difference]: Start difference. First operand 5776 states and 23362 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2022-01-28 16:03:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:12,741 INFO L93 Difference]: Finished difference Result 13141 states and 52344 transitions. [2022-01-28 16:03:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 16:03:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-28 16:03:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:12,774 INFO L225 Difference]: With dead ends: 13141 [2022-01-28 16:03:12,775 INFO L226 Difference]: Without dead ends: 12241 [2022-01-28 16:03:12,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-01-28 16:03:12,776 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 229 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:12,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 162 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2022-01-28 16:03:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 8849. [2022-01-28 16:03:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.189421338155515) internal successors, (37068), 8848 states have internal predecessors, (37068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2022-01-28 16:03:13,052 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2022-01-28 16:03:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:13,052 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2022-01-28 16:03:13,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2022-01-28 16:03:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2022-01-28 16:03:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 16:03:13,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:13,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:13,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:13,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-28 16:03:13,288 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 325420737, now seen corresponding path program 5 times [2022-01-28 16:03:13,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:13,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492067757] [2022-01-28 16:03:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:13,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:13,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:13,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492067757] [2022-01-28 16:03:13,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492067757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:13,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134537541] [2022-01-28 16:03:13,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 16:03:13,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:13,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:13,384 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) [2022-01-28 16:03:13,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 16:03:13,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 16:03:13,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:13,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 16:03:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:13,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:13,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134537541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:13,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:13,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-28 16:03:13,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764868908] [2022-01-28 16:03:13,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:13,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 16:03:13,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:13,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 16:03:13,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-28 16:03:13,675 INFO L87 Difference]: Start difference. First operand 8849 states and 37068 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:14,166 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2022-01-28 16:03:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 16:03:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-28 16:03:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:14,255 INFO L225 Difference]: With dead ends: 24527 [2022-01-28 16:03:14,255 INFO L226 Difference]: Without dead ends: 24223 [2022-01-28 16:03:14,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-01-28 16:03:14,256 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 483 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:14,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 191 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 16:03:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2022-01-28 16:03:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2022-01-28 16:03:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12684 states, 12683 states have (on average 4.337932665773082) internal successors, (55018), 12683 states have internal predecessors, (55018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2022-01-28 16:03:14,852 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2022-01-28 16:03:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:14,853 INFO L470 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2022-01-28 16:03:14,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2022-01-28 16:03:14,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 16:03:14,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:14,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:14,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:15,097 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,SelfDestructingSolverStorable17 [2022-01-28 16:03:15,097 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash -132626495, now seen corresponding path program 6 times [2022-01-28 16:03:15,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:15,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772023575] [2022-01-28 16:03:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:15,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:15,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:15,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772023575] [2022-01-28 16:03:15,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772023575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:15,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313514683] [2022-01-28 16:03:15,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 16:03:15,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:15,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:15,234 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) [2022-01-28 16:03:15,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 16:03:15,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 16:03:15,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:15,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 16:03:15,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:15,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:15,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313514683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:15,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:15,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 14 [2022-01-28 16:03:15,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382236337] [2022-01-28 16:03:15,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:15,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 16:03:15,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:15,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 16:03:15,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-28 16:03:15,483 INFO L87 Difference]: Start difference. First operand 12684 states and 55018 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2022-01-28 16:03:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:16,572 INFO L93 Difference]: Finished difference Result 66695 states and 282227 transitions. [2022-01-28 16:03:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 16:03:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) Word has length 31 [2022-01-28 16:03:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:17,068 INFO L225 Difference]: With dead ends: 66695 [2022-01-28 16:03:17,068 INFO L226 Difference]: Without dead ends: 65385 [2022-01-28 16:03:17,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 16:03:17,072 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 667 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:17,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 174 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 16:03:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65385 states. [2022-01-28 16:03:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65385 to 33143. [2022-01-28 16:03:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33143 states, 33142 states have (on average 4.745911532194798) internal successors, (157289), 33142 states have internal predecessors, (157289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2022-01-28 16:03:18,916 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2022-01-28 16:03:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:18,916 INFO L470 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2022-01-28 16:03:18,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2022-01-28 16:03:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2022-01-28 16:03:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 16:03:19,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:19,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:19,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:19,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:19,243 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1854514437, now seen corresponding path program 7 times [2022-01-28 16:03:19,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:19,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169281057] [2022-01-28 16:03:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:19,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:19,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:19,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169281057] [2022-01-28 16:03:19,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169281057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:19,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787551457] [2022-01-28 16:03:19,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 16:03:19,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:19,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:19,349 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) [2022-01-28 16:03:19,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 16:03:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:19,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 16:03:19,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:19,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:19,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787551457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:19,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:19,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-28 16:03:19,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054888664] [2022-01-28 16:03:19,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:19,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 16:03:19,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 16:03:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-28 16:03:19,602 INFO L87 Difference]: Start difference. First operand 33143 states and 157289 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:20,250 INFO L93 Difference]: Finished difference Result 48619 states and 218179 transitions. [2022-01-28 16:03:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 16:03:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-28 16:03:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:20,561 INFO L225 Difference]: With dead ends: 48619 [2022-01-28 16:03:20,561 INFO L226 Difference]: Without dead ends: 48487 [2022-01-28 16:03:20,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-01-28 16:03:20,565 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 262 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:20,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 218 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 16:03:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48487 states. [2022-01-28 16:03:21,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48487 to 33850. [2022-01-28 16:03:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33850 states, 33849 states have (on average 4.7301249667641585) internal successors, (160110), 33849 states have internal predecessors, (160110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2022-01-28 16:03:21,902 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2022-01-28 16:03:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:21,902 INFO L470 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2022-01-28 16:03:21,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2022-01-28 16:03:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 16:03:21,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:21,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:22,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:22,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:22,208 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -670266441, now seen corresponding path program 8 times [2022-01-28 16:03:22,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:22,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858413866] [2022-01-28 16:03:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:22,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:22,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:22,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858413866] [2022-01-28 16:03:22,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858413866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:22,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048567767] [2022-01-28 16:03:22,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:03:22,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:22,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:22,469 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) [2022-01-28 16:03:22,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 16:03:22,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:03:22,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 16:03:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:22,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:22,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048567767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:22,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:22,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 14 [2022-01-28 16:03:22,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707940178] [2022-01-28 16:03:22,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:22,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 16:03:22,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:22,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 16:03:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-28 16:03:22,704 INFO L87 Difference]: Start difference. First operand 33850 states and 160110 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:24,717 INFO L93 Difference]: Finished difference Result 83302 states and 345101 transitions. [2022-01-28 16:03:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-28 16:03:24,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-28 16:03:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:25,187 INFO L225 Difference]: With dead ends: 83302 [2022-01-28 16:03:25,187 INFO L226 Difference]: Without dead ends: 81495 [2022-01-28 16:03:25,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1274, Invalid=4128, Unknown=0, NotChecked=0, Total=5402 [2022-01-28 16:03:25,191 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 855 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:25,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 371 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 16:03:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81495 states. [2022-01-28 16:03:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81495 to 32872. [2022-01-28 16:03:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32872 states, 32871 states have (on average 4.6574183931124695) internal successors, (153094), 32871 states have internal predecessors, (153094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2022-01-28 16:03:26,822 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2022-01-28 16:03:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:26,823 INFO L470 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2022-01-28 16:03:26,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2022-01-28 16:03:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 16:03:26,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:26,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:26,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:27,115 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,SelfDestructingSolverStorable20 [2022-01-28 16:03:27,116 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash 135314879, now seen corresponding path program 9 times [2022-01-28 16:03:27,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:27,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767914634] [2022-01-28 16:03:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:27,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:27,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767914634] [2022-01-28 16:03:27,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767914634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:27,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608265985] [2022-01-28 16:03:27,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 16:03:27,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:27,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:27,671 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) [2022-01-28 16:03:27,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 16:03:27,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 16:03:27,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:27,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 16:03:27,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:27,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:27,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608265985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:27,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:27,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-28 16:03:27,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286489987] [2022-01-28 16:03:27,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:27,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 16:03:27,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:27,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 16:03:27,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-28 16:03:27,974 INFO L87 Difference]: Start difference. First operand 32872 states and 153094 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:29,261 INFO L93 Difference]: Finished difference Result 59892 states and 264687 transitions. [2022-01-28 16:03:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 16:03:29,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-28 16:03:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:29,607 INFO L225 Difference]: With dead ends: 59892 [2022-01-28 16:03:29,621 INFO L226 Difference]: Without dead ends: 59562 [2022-01-28 16:03:29,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1320, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 16:03:29,623 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 503 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:29,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 271 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 16:03:29,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59562 states. [2022-01-28 16:03:30,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59562 to 32800. [2022-01-28 16:03:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32800 states, 32799 states have (on average 4.647367297783469) internal successors, (152429), 32799 states have internal predecessors, (152429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2022-01-28 16:03:30,904 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2022-01-28 16:03:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:30,904 INFO L470 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2022-01-28 16:03:30,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2022-01-28 16:03:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 16:03:31,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:31,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:31,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:31,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:31,458 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:31,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:31,459 INFO L85 PathProgramCache]: Analyzing trace with hash -917380623, now seen corresponding path program 10 times [2022-01-28 16:03:31,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:31,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468744767] [2022-01-28 16:03:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:31,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:31,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468744767] [2022-01-28 16:03:31,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468744767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944246784] [2022-01-28 16:03:31,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 16:03:31,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:31,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:31,504 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) [2022-01-28 16:03:31,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 16:03:31,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 16:03:31,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:31,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 16:03:31,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 16:03:31,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:31,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944246784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:31,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:31,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-28 16:03:31,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988166743] [2022-01-28 16:03:31,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:31,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 16:03:31,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:31,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 16:03:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-28 16:03:31,714 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:32,624 INFO L93 Difference]: Finished difference Result 52086 states and 238055 transitions. [2022-01-28 16:03:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 16:03:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 16:03:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:32,938 INFO L225 Difference]: With dead ends: 52086 [2022-01-28 16:03:32,938 INFO L226 Difference]: Without dead ends: 51911 [2022-01-28 16:03:32,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-01-28 16:03:32,938 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:32,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 192 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 16:03:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51911 states. [2022-01-28 16:03:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51911 to 44066. [2022-01-28 16:03:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44066 states, 44065 states have (on average 4.725019857029388) internal successors, (208208), 44065 states have internal predecessors, (208208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2022-01-28 16:03:34,387 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2022-01-28 16:03:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:34,387 INFO L470 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2022-01-28 16:03:34,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2022-01-28 16:03:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 16:03:34,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:34,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:34,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:34,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:34,967 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1712141219, now seen corresponding path program 11 times [2022-01-28 16:03:34,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:34,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569665019] [2022-01-28 16:03:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:34,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:35,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569665019] [2022-01-28 16:03:35,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569665019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736044557] [2022-01-28 16:03:35,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 16:03:35,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:35,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:35,036 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) [2022-01-28 16:03:35,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 16:03:35,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 16:03:35,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:35,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 16:03:35,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:35,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:35,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736044557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:35,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:35,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-28 16:03:35,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708917512] [2022-01-28 16:03:35,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:35,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 16:03:35,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 16:03:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-28 16:03:35,300 INFO L87 Difference]: Start difference. First operand 44066 states and 208208 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:37,387 INFO L93 Difference]: Finished difference Result 144748 states and 644596 transitions. [2022-01-28 16:03:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-28 16:03:37,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 16:03:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:38,413 INFO L225 Difference]: With dead ends: 144748 [2022-01-28 16:03:38,413 INFO L226 Difference]: Without dead ends: 143934 [2022-01-28 16:03:38,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2022-01-28 16:03:38,415 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 663 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:38,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 360 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 16:03:38,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143934 states. [2022-01-28 16:03:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143934 to 81343. [2022-01-28 16:03:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81343 states, 81342 states have (on average 4.821174792849942) internal successors, (392164), 81342 states have internal predecessors, (392164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81343 states to 81343 states and 392164 transitions. [2022-01-28 16:03:42,284 INFO L78 Accepts]: Start accepts. Automaton has 81343 states and 392164 transitions. Word has length 33 [2022-01-28 16:03:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:42,284 INFO L470 AbstractCegarLoop]: Abstraction has 81343 states and 392164 transitions. [2022-01-28 16:03:42,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 81343 states and 392164 transitions. [2022-01-28 16:03:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 16:03:42,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:42,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:42,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:43,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-28 16:03:43,080 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1370285983, now seen corresponding path program 12 times [2022-01-28 16:03:43,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:43,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977438449] [2022-01-28 16:03:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:43,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:43,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:43,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977438449] [2022-01-28 16:03:43,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977438449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:43,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576510371] [2022-01-28 16:03:43,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 16:03:43,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:43,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:43,123 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) [2022-01-28 16:03:43,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 16:03:43,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 16:03:43,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:43,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 16:03:43,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:43,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 16:03:43,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576510371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:43,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:43,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-28 16:03:43,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471361050] [2022-01-28 16:03:43,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:43,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 16:03:43,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:43,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 16:03:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-28 16:03:43,348 INFO L87 Difference]: Start difference. First operand 81343 states and 392164 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 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) [2022-01-28 16:03:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:45,721 INFO L93 Difference]: Finished difference Result 162029 states and 737624 transitions. [2022-01-28 16:03:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 16:03:45,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 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) Word has length 33 [2022-01-28 16:03:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:47,091 INFO L225 Difference]: With dead ends: 162029 [2022-01-28 16:03:47,091 INFO L226 Difference]: Without dead ends: 161582 [2022-01-28 16:03:47,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2022-01-28 16:03:47,092 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 444 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:47,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 338 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 16:03:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161582 states. [2022-01-28 16:03:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161582 to 110132. [2022-01-28 16:03:50,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110132 states, 110131 states have (on average 4.7964878190518565) internal successors, (528242), 110131 states have internal predecessors, (528242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110132 states to 110132 states and 528242 transitions. [2022-01-28 16:03:51,979 INFO L78 Accepts]: Start accepts. Automaton has 110132 states and 528242 transitions. Word has length 33 [2022-01-28 16:03:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:51,979 INFO L470 AbstractCegarLoop]: Abstraction has 110132 states and 528242 transitions. [2022-01-28 16:03:51,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 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) [2022-01-28 16:03:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 110132 states and 528242 transitions. [2022-01-28 16:03:52,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 16:03:52,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:52,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:52,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:52,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:52,841 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:03:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:52,842 INFO L85 PathProgramCache]: Analyzing trace with hash 707900697, now seen corresponding path program 13 times [2022-01-28 16:03:52,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:52,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521685119] [2022-01-28 16:03:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:52,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 16:03:52,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:52,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521685119] [2022-01-28 16:03:52,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521685119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:52,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987768181] [2022-01-28 16:03:52,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 16:03:52,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:52,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:52,909 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) [2022-01-28 16:03:52,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 16:03:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 16:03:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:53,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 16:03:53,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987768181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:53,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:53,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-01-28 16:03:53,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558185954] [2022-01-28 16:03:53,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:53,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 16:03:53,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:53,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 16:03:53,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-28 16:03:53,050 INFO L87 Difference]: Start difference. First operand 110132 states and 528242 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:56,139 INFO L93 Difference]: Finished difference Result 232640 states and 1102907 transitions. [2022-01-28 16:03:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 16:03:56,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-28 16:03:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:58,728 INFO L225 Difference]: With dead ends: 232640 [2022-01-28 16:03:58,729 INFO L226 Difference]: Without dead ends: 231487 [2022-01-28 16:03:58,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2022-01-28 16:03:58,729 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 317 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:58,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 209 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 16:03:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231487 states. [2022-01-28 16:04:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231487 to 217570. [2022-01-28 16:04:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217570 states, 217569 states have (on average 4.7864263750810085) internal successors, (1041378), 217569 states have internal predecessors, (1041378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217570 states to 217570 states and 1041378 transitions. [2022-01-28 16:04:09,075 INFO L78 Accepts]: Start accepts. Automaton has 217570 states and 1041378 transitions. Word has length 35 [2022-01-28 16:04:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:04:09,075 INFO L470 AbstractCegarLoop]: Abstraction has 217570 states and 1041378 transitions. [2022-01-28 16:04:09,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 217570 states and 1041378 transitions. [2022-01-28 16:04:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 16:04:10,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:04:10,373 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:04:10,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-28 16:04:10,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:10,588 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:04:10,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:04:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1721346381, now seen corresponding path program 14 times [2022-01-28 16:04:10,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:04:10,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550319810] [2022-01-28 16:04:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:04:10,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:04:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:04:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 16:04:10,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:04:10,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550319810] [2022-01-28 16:04:10,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550319810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:04:10,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905852183] [2022-01-28 16:04:10,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:04:10,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:10,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:04:10,647 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) [2022-01-28 16:04:10,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 16:04:10,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:04:10,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:04:10,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 16:04:10,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:04:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 16:04:10,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:04:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 16:04:10,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905852183] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:04:10,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:04:10,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-28 16:04:10,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395985061] [2022-01-28 16:04:10,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:04:10,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 16:04:10,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:04:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 16:04:10,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-28 16:04:10,877 INFO L87 Difference]: Start difference. First operand 217570 states and 1041378 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:21,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:04:21,030 INFO L93 Difference]: Finished difference Result 665622 states and 3017455 transitions. [2022-01-28 16:04:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-28 16:04:21,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-28 16:04:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:04:27,230 INFO L225 Difference]: With dead ends: 665622 [2022-01-28 16:04:27,230 INFO L226 Difference]: Without dead ends: 663051 [2022-01-28 16:04:27,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1495, Invalid=5815, Unknown=0, NotChecked=0, Total=7310 [2022-01-28 16:04:27,232 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1085 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 16:04:27,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 392 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 16:04:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663051 states. [2022-01-28 16:04:58,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663051 to 429202. [2022-01-28 16:05:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429202 states, 429201 states have (on average 4.839436534397636) internal successors, (2077091), 429201 states have internal predecessors, (2077091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:05:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429202 states to 429202 states and 2077091 transitions. [2022-01-28 16:05:08,451 INFO L78 Accepts]: Start accepts. Automaton has 429202 states and 2077091 transitions. Word has length 35 [2022-01-28 16:05:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:05:08,451 INFO L470 AbstractCegarLoop]: Abstraction has 429202 states and 2077091 transitions. [2022-01-28 16:05:08,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:05:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 429202 states and 2077091 transitions. [2022-01-28 16:05:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-28 16:05:11,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:05:11,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:05:11,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 16:05:11,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:05:11,958 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 16:05:11,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:05:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1329498949, now seen corresponding path program 15 times [2022-01-28 16:05:11,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:05:11,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961661089] [2022-01-28 16:05:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:05:11,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:05:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:05:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 16:05:12,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:05:12,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961661089] [2022-01-28 16:05:12,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961661089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:05:12,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144766586] [2022-01-28 16:05:12,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 16:05:12,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:05:12,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:05:12,040 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) [2022-01-28 16:05:12,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 16:05:12,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 16:05:12,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:05:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 16:05:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:05:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-28 16:05:12,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:05:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 16:05:12,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144766586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:05:12,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:05:12,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2022-01-28 16:05:12,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136428406] [2022-01-28 16:05:12,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:05:12,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 16:05:12,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:05:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 16:05:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-28 16:05:12,379 INFO L87 Difference]: Start difference. First operand 429202 states and 2077091 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)