/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:31:48,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:31:48,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:31:48,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:31:48,636 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-Separate.epf [2022-01-18 14:31:48,662 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:31:48,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:31:48,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:31:48,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:31:48,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:31:48,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:31:48,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:31:48,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:31:48,664 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:31:48,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:31:48,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:31:48,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:31:48,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:31:48,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:31:48,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:31:48,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:31:48,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:31:48,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:31:48,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:31:48,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:31:48,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:31:48,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:31:48,667 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:31:48,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:31:48,667 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:31:48,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:31:48,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:31:48,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:31:48,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:31:48,854 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:31:48,855 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:31:48,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2022-01-18 14:31:48,856 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2022-01-18 14:31:48,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:31:48,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:31:48,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:31:48,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:31:48,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:31:48,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,897 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:31:48,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:31:48,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:31:48,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:31:48,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:31:48,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:31:48,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:31:48,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:31:48,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:31:48,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/1) ... [2022-01-18 14:31:48,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:31:48,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:31:48,940 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) [2022-01-18 14:31:48,942 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 [2022-01-18 14:31:48,962 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:31:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:31:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:31:48,962 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:31:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:31:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:31:48,962 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:31:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:31:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:31:48,963 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 14:31:48,993 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:31:48,995 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:31:49,114 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:31:49,153 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:31:49,154 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 14:31:49,154 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-01-18 14:31:49,154 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 14:31:49,155 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:31:49 BoogieIcfgContainer [2022-01-18 14:31:49,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:31:49,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:31:49,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:31:49,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:31:49,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:31:48" (1/2) ... [2022-01-18 14:31:49,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354fb8f0 and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:31:49, skipping insertion in model container [2022-01-18 14:31:49,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:31:49" (2/2) ... [2022-01-18 14:31:49,174 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2022-01-18 14:31:49,185 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:31:49,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:31:49,185 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:31:49,185 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:31:49,211 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 14:31:49,250 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:31:49,256 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 [2022-01-18 14:31:49,256 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 14:31:49,263 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-01-18 14:31:49,274 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-18 14:31:49,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:31:49,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:31:49,281 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:31:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:31:49,286 INFO L85 PathProgramCache]: Analyzing trace with hash 842249075, now seen corresponding path program 1 times [2022-01-18 14:31:49,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:31:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638926768] [2022-01-18 14:31:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:31:49,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:31:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:31:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:31:49,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:31:49,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638926768] [2022-01-18 14:31:49,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638926768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:31:49,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:31:49,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:31:49,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187522480] [2022-01-18 14:31:49,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:31:49,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:31:49,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:31:49,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:31:49,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:31:49,465 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:31:49,523 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2022-01-18 14:31:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:31:49,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-18 14:31:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:31:49,530 INFO L225 Difference]: With dead ends: 22 [2022-01-18 14:31:49,530 INFO L226 Difference]: Without dead ends: 19 [2022-01-18 14:31:49,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:31:49,534 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:31:49,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:31:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-18 14:31:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-18 14:31:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2022-01-18 14:31:49,579 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2022-01-18 14:31:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:31:49,579 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2022-01-18 14:31:49,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2022-01-18 14:31:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 14:31:49,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:31:49,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:31:49,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:31:49,580 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:31:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:31:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash 340649728, now seen corresponding path program 1 times [2022-01-18 14:31:49,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:31:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934995558] [2022-01-18 14:31:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:31:49,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:31:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:31:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:31:49,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:31:49,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934995558] [2022-01-18 14:31:49,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934995558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:31:49,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:31:49,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:31:49,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169009688] [2022-01-18 14:31:49,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:31:49,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:31:49,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:31:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:31:49,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:31:49,635 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:31:49,671 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2022-01-18 14:31:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:31:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 14:31:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:31:49,672 INFO L225 Difference]: With dead ends: 19 [2022-01-18 14:31:49,673 INFO L226 Difference]: Without dead ends: 15 [2022-01-18 14:31:49,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:31:49,678 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:31:49,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:31:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-18 14:31:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-18 14:31:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2022-01-18 14:31:49,690 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 10 [2022-01-18 14:31:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:31:49,690 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 25 transitions. [2022-01-18 14:31:49,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 25 transitions. [2022-01-18 14:31:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 14:31:49,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:31:49,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:31:49,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 14:31:49,692 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:31:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:31:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash 141890046, now seen corresponding path program 1 times [2022-01-18 14:31:49,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:31:49,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501581812] [2022-01-18 14:31:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:31:49,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:31:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:31:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:31:49,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:31:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501581812] [2022-01-18 14:31:49,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501581812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:31:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704365249] [2022-01-18 14:31:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:31:49,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:31:49,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:31:49,739 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) [2022-01-18 14:31:49,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 14:31:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:31:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:31:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:31:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:31:49,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:31:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:31:49,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704365249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:31:49,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:31:49,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-18 14:31:49,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058962552] [2022-01-18 14:31:49,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:31:49,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:31:49,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:31:49,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:31:49,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:31:49,879 INFO L87 Difference]: Start difference. First operand 15 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:31:49,912 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2022-01-18 14:31:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:31:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 14:31:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:31:49,913 INFO L225 Difference]: With dead ends: 18 [2022-01-18 14:31:49,913 INFO L226 Difference]: Without dead ends: 18 [2022-01-18 14:31:49,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:31:49,914 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:31:49,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:31:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-18 14:31:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-18 14:31:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2022-01-18 14:31:49,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2022-01-18 14:31:49,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:31:49,917 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2022-01-18 14:31:49,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2022-01-18 14:31:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 14:31:49,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:31:49,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:31:49,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 14:31:50,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:31:50,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:31:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:31:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash 175957154, now seen corresponding path program 2 times [2022-01-18 14:31:50,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:31:50,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882754310] [2022-01-18 14:31:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:31:50,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:31:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:31:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:31:50,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:31:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882754310] [2022-01-18 14:31:50,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882754310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:31:50,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:31:50,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:31:50,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369465941] [2022-01-18 14:31:50,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:31:50,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:31:50,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:31:50,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:31:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:31:50,158 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:31:50,177 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2022-01-18 14:31:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:31:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 14:31:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:31:50,178 INFO L225 Difference]: With dead ends: 20 [2022-01-18 14:31:50,178 INFO L226 Difference]: Without dead ends: 20 [2022-01-18 14:31:50,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:31:50,179 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:31:50,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:31:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-18 14:31:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-18 14:31:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2022-01-18 14:31:50,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2022-01-18 14:31:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:31:50,183 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2022-01-18 14:31:50,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2022-01-18 14:31:50,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-18 14:31:50,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:31:50,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:31:50,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 14:31:50,184 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:31:50,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:31:50,184 INFO L85 PathProgramCache]: Analyzing trace with hash 104356309, now seen corresponding path program 1 times [2022-01-18 14:31:50,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:31:50,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753244236] [2022-01-18 14:31:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:31:50,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:31:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:31:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:31:50,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:31:50,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753244236] [2022-01-18 14:31:50,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753244236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:31:50,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910242722] [2022-01-18 14:31:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:31:50,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:31:50,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:31:50,218 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) [2022-01-18 14:31:50,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 14:31:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:31:50,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:31:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:31:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:31:50,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:31:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:31:50,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910242722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:31:50,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:31:50,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-18 14:31:50,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91008142] [2022-01-18 14:31:50,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:31:50,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:31:50,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:31:50,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:31:50,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:31:50,308 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:31:50,357 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2022-01-18 14:31:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:31:50,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-18 14:31:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:31:50,358 INFO L225 Difference]: With dead ends: 28 [2022-01-18 14:31:50,359 INFO L226 Difference]: Without dead ends: 28 [2022-01-18 14:31:50,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:31:50,362 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:31:50,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 11 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:31:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-18 14:31:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-18 14:31:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2022-01-18 14:31:50,372 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 11 [2022-01-18 14:31:50,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:31:50,372 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2022-01-18 14:31:50,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2022-01-18 14:31:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 14:31:50,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:31:50,373 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:31:50,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 14:31:50,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:31:50,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:31:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:31:50,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1924485941, now seen corresponding path program 2 times [2022-01-18 14:31:50,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:31:50,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207886960] [2022-01-18 14:31:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:31:50,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:31:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:31:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:31:50,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:31:50,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207886960] [2022-01-18 14:31:50,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207886960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:31:50,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480219615] [2022-01-18 14:31:50,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:31:50,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:31:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:31:50,690 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) [2022-01-18 14:31:50,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 14:31:50,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:31:50,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:31:50,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:31:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:31:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:31:50,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:31:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:31:50,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480219615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:31:50,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:31:50,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-18 14:31:50,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91191280] [2022-01-18 14:31:50,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:31:50,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:31:50,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:31:50,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:31:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:31:50,822 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:31:50,878 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2022-01-18 14:31:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:31:50,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 14:31:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:31:50,879 INFO L225 Difference]: With dead ends: 32 [2022-01-18 14:31:50,879 INFO L226 Difference]: Without dead ends: 32 [2022-01-18 14:31:50,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:31:50,880 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:31:50,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:31:50,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-18 14:31:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-18 14:31:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2022-01-18 14:31:50,884 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2022-01-18 14:31:50,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:31:50,884 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2022-01-18 14:31:50,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2022-01-18 14:31:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:31:50,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:31:50,885 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:31:50,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 14:31:51,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:31:51,102 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:31:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:31:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1958638656, now seen corresponding path program 3 times [2022-01-18 14:31:51,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:31:51,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992144677] [2022-01-18 14:31:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:31:51,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:31:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:31:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:31:51,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:31:51,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992144677] [2022-01-18 14:31:51,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992144677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:31:51,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902455037] [2022-01-18 14:31:51,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:31:51,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:31:51,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:31:51,142 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) [2022-01-18 14:31:51,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 14:31:51,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:31:51,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:31:51,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:31:51,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:31:51,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:31:51,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:31:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:31:51,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:31:51,573 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:31:51,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:31:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:31:59,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902455037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:31:59,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:31:59,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-01-18 14:31:59,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52140005] [2022-01-18 14:31:59,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:31:59,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:31:59,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:31:59,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:31:59,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:31:59,746 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:31:59,866 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2022-01-18 14:31:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:31:59,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:31:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:31:59,867 INFO L225 Difference]: With dead ends: 80 [2022-01-18 14:31:59,867 INFO L226 Difference]: Without dead ends: 77 [2022-01-18 14:31:59,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:31:59,868 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:31:59,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:31:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-18 14:31:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2022-01-18 14:31:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.186046511627907) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 94 transitions. [2022-01-18 14:31:59,873 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 94 transitions. Word has length 14 [2022-01-18 14:31:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:31:59,873 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 94 transitions. [2022-01-18 14:31:59,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:31:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 94 transitions. [2022-01-18 14:31:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:31:59,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:31:59,873 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:31:59,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:00,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:00,079 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:00,080 INFO L85 PathProgramCache]: Analyzing trace with hash -617160214, now seen corresponding path program 4 times [2022-01-18 14:32:00,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:00,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605952541] [2022-01-18 14:32:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:00,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:00,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605952541] [2022-01-18 14:32:00,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605952541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910426679] [2022-01-18 14:32:00,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:32:00,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:00,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:00,127 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) [2022-01-18 14:32:00,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 14:32:00,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:32:00,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:32:00,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:00,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:32:00,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:32:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:00,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:00,433 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:32:00,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:32:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:07,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910426679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:07,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:07,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-01-18 14:32:07,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738551619] [2022-01-18 14:32:07,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:07,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:07,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:07,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:07,271 INFO L87 Difference]: Start difference. First operand 44 states and 94 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:07,404 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2022-01-18 14:32:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:32:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:32:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:07,405 INFO L225 Difference]: With dead ends: 89 [2022-01-18 14:32:07,406 INFO L226 Difference]: Without dead ends: 86 [2022-01-18 14:32:07,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:07,406 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:07,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-18 14:32:07,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2022-01-18 14:32:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 119 transitions. [2022-01-18 14:32:07,411 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 119 transitions. Word has length 14 [2022-01-18 14:32:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:07,412 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 119 transitions. [2022-01-18 14:32:07,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 119 transitions. [2022-01-18 14:32:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:32:07,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:07,413 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:07,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:07,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:07,613 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1947955938, now seen corresponding path program 5 times [2022-01-18 14:32:07,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:07,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112347334] [2022-01-18 14:32:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:07,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:07,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:07,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112347334] [2022-01-18 14:32:07,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112347334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:07,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50544718] [2022-01-18 14:32:07,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:32:07,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:07,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:07,650 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) [2022-01-18 14:32:07,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 14:32:07,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:32:07,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:07,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:32:07,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:07,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:32:07,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:32:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:07,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:07,955 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:32:07,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:32:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:10,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50544718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:10,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:10,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-01-18 14:32:10,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444145042] [2022-01-18 14:32:10,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:10,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:10,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:10,246 INFO L87 Difference]: Start difference. First operand 51 states and 119 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:10,357 INFO L93 Difference]: Finished difference Result 98 states and 200 transitions. [2022-01-18 14:32:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:32:10,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:32:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:10,358 INFO L225 Difference]: With dead ends: 98 [2022-01-18 14:32:10,358 INFO L226 Difference]: Without dead ends: 95 [2022-01-18 14:32:10,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:10,358 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:10,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 41 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-18 14:32:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2022-01-18 14:32:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2022-01-18 14:32:10,363 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 14 [2022-01-18 14:32:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:10,363 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2022-01-18 14:32:10,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2022-01-18 14:32:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:32:10,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:10,364 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:10,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:10,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:10,577 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash -137821974, now seen corresponding path program 6 times [2022-01-18 14:32:10,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:10,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514670010] [2022-01-18 14:32:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:10,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:10,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:10,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514670010] [2022-01-18 14:32:10,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514670010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:10,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702321362] [2022-01-18 14:32:10,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:32:10,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:10,609 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) [2022-01-18 14:32:10,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 14:32:10,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:32:10,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:10,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:32:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:10,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:32:10,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:32:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:10,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:10,946 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:32:10,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:32:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:16,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702321362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:16,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:16,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2022-01-18 14:32:16,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845876592] [2022-01-18 14:32:16,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:16,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:32:16,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:32:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:32:16,207 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:16,337 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2022-01-18 14:32:16,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:32:16,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:32:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:16,338 INFO L225 Difference]: With dead ends: 108 [2022-01-18 14:32:16,338 INFO L226 Difference]: Without dead ends: 105 [2022-01-18 14:32:16,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:32:16,339 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:16,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-18 14:32:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2022-01-18 14:32:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.656716417910448) internal successors, (178), 67 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 178 transitions. [2022-01-18 14:32:16,358 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 178 transitions. Word has length 14 [2022-01-18 14:32:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:16,358 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 178 transitions. [2022-01-18 14:32:16,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 178 transitions. [2022-01-18 14:32:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 14:32:16,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:16,359 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:16,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:16,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:16,571 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:16,572 INFO L85 PathProgramCache]: Analyzing trace with hash -372427806, now seen corresponding path program 7 times [2022-01-18 14:32:16,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:16,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373419713] [2022-01-18 14:32:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:16,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:16,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:16,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373419713] [2022-01-18 14:32:16,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373419713] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:16,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196108156] [2022-01-18 14:32:16,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:32:16,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:16,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:16,614 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) [2022-01-18 14:32:16,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 14:32:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:16,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:32:16,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:16,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:32:16,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 14:32:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:16,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:17,018 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 14:32:17,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 14:32:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:22,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196108156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:22,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:22,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-01-18 14:32:22,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390784884] [2022-01-18 14:32:22,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:22,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:32:22,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:32:22,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:32:22,722 INFO L87 Difference]: Start difference. First operand 68 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:22,836 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2022-01-18 14:32:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:32:22,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 14:32:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:22,838 INFO L225 Difference]: With dead ends: 119 [2022-01-18 14:32:22,838 INFO L226 Difference]: Without dead ends: 116 [2022-01-18 14:32:22,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:32:22,838 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:22,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-18 14:32:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2022-01-18 14:32:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.730769230769231) internal successors, (213), 78 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 213 transitions. [2022-01-18 14:32:22,842 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 213 transitions. Word has length 14 [2022-01-18 14:32:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:22,843 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 213 transitions. [2022-01-18 14:32:22,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 213 transitions. [2022-01-18 14:32:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:22,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:22,843 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:22,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:23,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 14:32:23,044 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash 588988371, now seen corresponding path program 8 times [2022-01-18 14:32:23,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:23,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299685343] [2022-01-18 14:32:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:23,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:23,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:23,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299685343] [2022-01-18 14:32:23,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299685343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:23,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015142169] [2022-01-18 14:32:23,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:32:23,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:23,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:23,089 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) [2022-01-18 14:32:23,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 14:32:23,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:32:23,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:23,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:23,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:23,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015142169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:23,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:23,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:23,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908608186] [2022-01-18 14:32:23,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:23,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:23,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:23,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:23,265 INFO L87 Difference]: Start difference. First operand 79 states and 213 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:23,428 INFO L93 Difference]: Finished difference Result 156 states and 339 transitions. [2022-01-18 14:32:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:32:23,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:23,429 INFO L225 Difference]: With dead ends: 156 [2022-01-18 14:32:23,430 INFO L226 Difference]: Without dead ends: 151 [2022-01-18 14:32:23,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:32:23,430 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 85 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:23,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 31 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-18 14:32:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 91. [2022-01-18 14:32:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.7777777777777777) internal successors, (250), 90 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 250 transitions. [2022-01-18 14:32:23,446 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 250 transitions. Word has length 15 [2022-01-18 14:32:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:23,447 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 250 transitions. [2022-01-18 14:32:23,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 250 transitions. [2022-01-18 14:32:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:23,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:23,451 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:23,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:23,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:23,667 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1277594475, now seen corresponding path program 9 times [2022-01-18 14:32:23,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:23,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387361904] [2022-01-18 14:32:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:23,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:23,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:23,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387361904] [2022-01-18 14:32:23,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387361904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:23,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92196492] [2022-01-18 14:32:23,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:32:23,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:23,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:23,711 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) [2022-01-18 14:32:23,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:32:23,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:23,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 14:32:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:23,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:23,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92196492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:23,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:23,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:23,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120753468] [2022-01-18 14:32:23,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:23,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:23,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:23,839 INFO L87 Difference]: Start difference. First operand 91 states and 250 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:23,981 INFO L93 Difference]: Finished difference Result 166 states and 350 transitions. [2022-01-18 14:32:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:32:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:23,983 INFO L225 Difference]: With dead ends: 166 [2022-01-18 14:32:23,983 INFO L226 Difference]: Without dead ends: 164 [2022-01-18 14:32:23,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:32:23,985 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:23,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 53 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-18 14:32:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 98. [2022-01-18 14:32:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.731958762886598) internal successors, (265), 97 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 265 transitions. [2022-01-18 14:32:23,993 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 265 transitions. Word has length 15 [2022-01-18 14:32:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:23,993 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 265 transitions. [2022-01-18 14:32:23,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 265 transitions. [2022-01-18 14:32:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:23,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:23,994 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:24,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:24,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 14:32:24,207 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1350497361, now seen corresponding path program 10 times [2022-01-18 14:32:24,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:24,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963566119] [2022-01-18 14:32:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:24,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:24,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963566119] [2022-01-18 14:32:24,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963566119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524677402] [2022-01-18 14:32:24,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:32:24,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:24,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:24,250 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) [2022-01-18 14:32:24,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 14:32:24,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:32:24,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:24,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:24,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:24,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:24,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524677402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:24,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:24,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:24,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906090093] [2022-01-18 14:32:24,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:24,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:24,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:24,385 INFO L87 Difference]: Start difference. First operand 98 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:24,493 INFO L93 Difference]: Finished difference Result 130 states and 308 transitions. [2022-01-18 14:32:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:32:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:24,494 INFO L225 Difference]: With dead ends: 130 [2022-01-18 14:32:24,494 INFO L226 Difference]: Without dead ends: 129 [2022-01-18 14:32:24,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:32:24,495 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:24,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 23 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-18 14:32:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 99. [2022-01-18 14:32:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2022-01-18 14:32:24,497 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2022-01-18 14:32:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:24,498 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2022-01-18 14:32:24,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2022-01-18 14:32:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:24,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:24,498 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:24,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:24,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 14:32:24,699 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:24,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2078385983, now seen corresponding path program 11 times [2022-01-18 14:32:24,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:24,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741909040] [2022-01-18 14:32:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:24,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:24,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741909040] [2022-01-18 14:32:24,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741909040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309943634] [2022-01-18 14:32:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:32:24,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:24,756 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) [2022-01-18 14:32:24,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 14:32:24,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:32:24,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:24,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:24,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:24,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:24,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309943634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:24,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:24,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:24,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327929130] [2022-01-18 14:32:24,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:24,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:24,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:24,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:24,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:24,889 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:24,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:24,948 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2022-01-18 14:32:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:32:24,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:24,949 INFO L225 Difference]: With dead ends: 166 [2022-01-18 14:32:24,949 INFO L226 Difference]: Without dead ends: 166 [2022-01-18 14:32:24,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:24,949 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 69 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:24,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 25 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:32:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-18 14:32:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 99. [2022-01-18 14:32:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2022-01-18 14:32:24,952 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2022-01-18 14:32:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:24,953 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2022-01-18 14:32:24,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2022-01-18 14:32:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:24,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:24,953 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:24,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:25,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 14:32:25,165 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1951365271, now seen corresponding path program 12 times [2022-01-18 14:32:25,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:25,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004034600] [2022-01-18 14:32:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:25,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:25,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004034600] [2022-01-18 14:32:25,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004034600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061299251] [2022-01-18 14:32:25,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:32:25,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:25,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:25,209 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) [2022-01-18 14:32:25,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 14:32:25,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:32:25,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:25,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:25,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:25,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061299251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:25,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:25,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:25,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940444073] [2022-01-18 14:32:25,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:25,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:25,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:25,337 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:25,665 INFO L93 Difference]: Finished difference Result 286 states and 534 transitions. [2022-01-18 14:32:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:32:25,665 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:25,667 INFO L225 Difference]: With dead ends: 286 [2022-01-18 14:32:25,667 INFO L226 Difference]: Without dead ends: 282 [2022-01-18 14:32:25,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=508, Invalid=974, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:32:25,668 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 179 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:25,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 41 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-18 14:32:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 99. [2022-01-18 14:32:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.683673469387755) internal successors, (263), 98 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 263 transitions. [2022-01-18 14:32:25,672 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 263 transitions. Word has length 15 [2022-01-18 14:32:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:25,672 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 263 transitions. [2022-01-18 14:32:25,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 263 transitions. [2022-01-18 14:32:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:25,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:25,672 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:25,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:25,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 14:32:25,875 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:25,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1288277193, now seen corresponding path program 13 times [2022-01-18 14:32:25,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:25,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954872186] [2022-01-18 14:32:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:25,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:25,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:25,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954872186] [2022-01-18 14:32:25,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954872186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:25,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131746856] [2022-01-18 14:32:25,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:32:25,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:25,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:25,917 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) [2022-01-18 14:32:25,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 14:32:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:25,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:26,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131746856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:26,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:26,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:26,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407934886] [2022-01-18 14:32:26,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:26,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:26,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:26,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:26,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:26,049 INFO L87 Difference]: Start difference. First operand 99 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:26,173 INFO L93 Difference]: Finished difference Result 176 states and 372 transitions. [2022-01-18 14:32:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:32:26,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:26,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:26,178 INFO L225 Difference]: With dead ends: 176 [2022-01-18 14:32:26,178 INFO L226 Difference]: Without dead ends: 176 [2022-01-18 14:32:26,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:32:26,178 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:26,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 51 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:26,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-18 14:32:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 104. [2022-01-18 14:32:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6893203883495147) internal successors, (277), 103 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 277 transitions. [2022-01-18 14:32:26,181 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 277 transitions. Word has length 15 [2022-01-18 14:32:26,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:26,182 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 277 transitions. [2022-01-18 14:32:26,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 277 transitions. [2022-01-18 14:32:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:26,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:26,182 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:26,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:26,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:26,390 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash -379353783, now seen corresponding path program 14 times [2022-01-18 14:32:26,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:26,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978443009] [2022-01-18 14:32:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:26,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:26,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:26,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978443009] [2022-01-18 14:32:26,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978443009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:26,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982971022] [2022-01-18 14:32:26,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:32:26,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:26,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:26,433 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) [2022-01-18 14:32:26,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 14:32:26,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:32:26,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:26,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:26,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:26,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982971022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:26,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:26,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:26,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227167120] [2022-01-18 14:32:26,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:26,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:26,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:26,571 INFO L87 Difference]: Start difference. First operand 104 states and 277 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:26,709 INFO L93 Difference]: Finished difference Result 179 states and 373 transitions. [2022-01-18 14:32:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:32:26,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:26,710 INFO L225 Difference]: With dead ends: 179 [2022-01-18 14:32:26,710 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 14:32:26,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:32:26,711 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 89 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:26,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 39 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:26,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 14:32:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 104. [2022-01-18 14:32:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.679611650485437) internal successors, (276), 103 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 276 transitions. [2022-01-18 14:32:26,714 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 276 transitions. Word has length 15 [2022-01-18 14:32:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:26,714 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 276 transitions. [2022-01-18 14:32:26,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 276 transitions. [2022-01-18 14:32:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:26,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:26,715 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:26,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:26,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 14:32:26,927 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash 486730169, now seen corresponding path program 15 times [2022-01-18 14:32:26,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900261737] [2022-01-18 14:32:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:26,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:26,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900261737] [2022-01-18 14:32:26,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900261737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976020594] [2022-01-18 14:32:26,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:32:26,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:26,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:26,972 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) [2022-01-18 14:32:26,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 14:32:26,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:32:26,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:26,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:27,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:27,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976020594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:27,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:27,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:27,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600990291] [2022-01-18 14:32:27,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:27,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:27,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:27,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:27,099 INFO L87 Difference]: Start difference. First operand 104 states and 276 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:27,290 INFO L93 Difference]: Finished difference Result 279 states and 534 transitions. [2022-01-18 14:32:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:32:27,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:27,292 INFO L225 Difference]: With dead ends: 279 [2022-01-18 14:32:27,292 INFO L226 Difference]: Without dead ends: 279 [2022-01-18 14:32:27,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=230, Invalid=322, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:32:27,293 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 154 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:27,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 57 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-18 14:32:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 104. [2022-01-18 14:32:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.679611650485437) internal successors, (276), 103 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 276 transitions. [2022-01-18 14:32:27,296 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 276 transitions. Word has length 15 [2022-01-18 14:32:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:27,297 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 276 transitions. [2022-01-18 14:32:27,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 276 transitions. [2022-01-18 14:32:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:27,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:27,297 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:27,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:27,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:27,503 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:27,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:27,504 INFO L85 PathProgramCache]: Analyzing trace with hash 475952871, now seen corresponding path program 16 times [2022-01-18 14:32:27,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:27,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087761106] [2022-01-18 14:32:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:27,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:27,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087761106] [2022-01-18 14:32:27,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087761106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537570697] [2022-01-18 14:32:27,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:32:27,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:27,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:27,544 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) [2022-01-18 14:32:27,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 14:32:27,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:32:27,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:27,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:27,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:27,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537570697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:27,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:27,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:27,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990808099] [2022-01-18 14:32:27,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:27,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:27,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:27,663 INFO L87 Difference]: Start difference. First operand 104 states and 276 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:27,811 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2022-01-18 14:32:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:32:27,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:27,812 INFO L225 Difference]: With dead ends: 160 [2022-01-18 14:32:27,812 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 14:32:27,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:32:27,813 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:27,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 14:32:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2022-01-18 14:32:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6634615384615383) internal successors, (277), 104 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 277 transitions. [2022-01-18 14:32:27,815 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 277 transitions. Word has length 15 [2022-01-18 14:32:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:27,816 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 277 transitions. [2022-01-18 14:32:27,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 277 transitions. [2022-01-18 14:32:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:27,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:27,816 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:27,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-18 14:32:28,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:28,027 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:28,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2097623819, now seen corresponding path program 17 times [2022-01-18 14:32:28,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:28,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795459140] [2022-01-18 14:32:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:28,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:28,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:28,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795459140] [2022-01-18 14:32:28,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795459140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:28,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52076664] [2022-01-18 14:32:28,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:32:28,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:28,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:28,075 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) [2022-01-18 14:32:28,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 14:32:28,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:32:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:28,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:28,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:28,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:28,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52076664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:28,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:28,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:28,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425285584] [2022-01-18 14:32:28,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:28,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:28,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:28,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:28,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:28,185 INFO L87 Difference]: Start difference. First operand 105 states and 277 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:28,406 INFO L93 Difference]: Finished difference Result 293 states and 557 transitions. [2022-01-18 14:32:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:32:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:28,407 INFO L225 Difference]: With dead ends: 293 [2022-01-18 14:32:28,407 INFO L226 Difference]: Without dead ends: 293 [2022-01-18 14:32:28,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=427, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:32:28,408 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 167 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:28,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 41 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-18 14:32:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 105. [2022-01-18 14:32:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6634615384615383) internal successors, (277), 104 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 277 transitions. [2022-01-18 14:32:28,412 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 277 transitions. Word has length 15 [2022-01-18 14:32:28,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:28,412 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 277 transitions. [2022-01-18 14:32:28,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:28,412 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 277 transitions. [2022-01-18 14:32:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:28,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:28,414 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:28,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:28,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:28,627 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 257824113, now seen corresponding path program 18 times [2022-01-18 14:32:28,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:28,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665917994] [2022-01-18 14:32:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:28,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:28,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:28,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665917994] [2022-01-18 14:32:28,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665917994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041264055] [2022-01-18 14:32:28,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:32:28,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:28,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:28,669 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) [2022-01-18 14:32:28,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 14:32:28,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:32:28,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:28,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:28,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:28,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041264055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:28,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:28,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:28,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263447384] [2022-01-18 14:32:28,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:28,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:28,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:28,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:28,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:28,815 INFO L87 Difference]: Start difference. First operand 105 states and 277 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:29,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:29,146 INFO L93 Difference]: Finished difference Result 298 states and 545 transitions. [2022-01-18 14:32:29,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:32:29,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:29,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:29,148 INFO L225 Difference]: With dead ends: 298 [2022-01-18 14:32:29,148 INFO L226 Difference]: Without dead ends: 292 [2022-01-18 14:32:29,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=980, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:32:29,148 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 200 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:29,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 37 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-18 14:32:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 105. [2022-01-18 14:32:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6346153846153846) internal successors, (274), 104 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 274 transitions. [2022-01-18 14:32:29,152 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 274 transitions. Word has length 15 [2022-01-18 14:32:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:29,152 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 274 transitions. [2022-01-18 14:32:29,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 274 transitions. [2022-01-18 14:32:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:29,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:29,152 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:29,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:29,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:29,367 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash 920912191, now seen corresponding path program 19 times [2022-01-18 14:32:29,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:29,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284434768] [2022-01-18 14:32:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:29,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:29,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284434768] [2022-01-18 14:32:29,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284434768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954305098] [2022-01-18 14:32:29,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:32:29,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:29,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:29,398 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) [2022-01-18 14:32:29,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 14:32:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:29,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:29,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:29,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954305098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:29,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:29,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:29,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87400746] [2022-01-18 14:32:29,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:29,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:29,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:29,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:29,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:29,525 INFO L87 Difference]: Start difference. First operand 105 states and 274 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:29,593 INFO L93 Difference]: Finished difference Result 185 states and 391 transitions. [2022-01-18 14:32:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:32:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:29,594 INFO L225 Difference]: With dead ends: 185 [2022-01-18 14:32:29,594 INFO L226 Difference]: Without dead ends: 185 [2022-01-18 14:32:29,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:32:29,594 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:29,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 41 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:32:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-18 14:32:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 110. [2022-01-18 14:32:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6605504587155964) internal successors, (290), 109 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 290 transitions. [2022-01-18 14:32:29,597 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 290 transitions. Word has length 15 [2022-01-18 14:32:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:29,597 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 290 transitions. [2022-01-18 14:32:29,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 290 transitions. [2022-01-18 14:32:29,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:29,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:29,598 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:29,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:29,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 14:32:29,812 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1829835601, now seen corresponding path program 20 times [2022-01-18 14:32:29,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:29,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754999498] [2022-01-18 14:32:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:29,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:29,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:29,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754999498] [2022-01-18 14:32:29,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754999498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:29,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974571684] [2022-01-18 14:32:29,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:32:29,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:29,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:29,852 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:29,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 14:32:29,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:32:29,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:29,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:29,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:29,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:29,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974571684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:29,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:29,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:29,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548095110] [2022-01-18 14:32:29,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:29,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:29,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:29,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:29,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:29,956 INFO L87 Difference]: Start difference. First operand 110 states and 290 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:30,084 INFO L93 Difference]: Finished difference Result 190 states and 395 transitions. [2022-01-18 14:32:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:32:30,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:30,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:30,085 INFO L225 Difference]: With dead ends: 190 [2022-01-18 14:32:30,085 INFO L226 Difference]: Without dead ends: 189 [2022-01-18 14:32:30,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:32:30,085 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:30,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-18 14:32:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 110. [2022-01-18 14:32:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6513761467889907) internal successors, (289), 109 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 289 transitions. [2022-01-18 14:32:30,088 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 289 transitions. Word has length 15 [2022-01-18 14:32:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:30,088 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 289 transitions. [2022-01-18 14:32:30,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 289 transitions. [2022-01-18 14:32:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:30,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:30,089 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:30,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:30,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 14:32:30,295 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:30,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1599047743, now seen corresponding path program 21 times [2022-01-18 14:32:30,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:30,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270874879] [2022-01-18 14:32:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:30,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:30,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270874879] [2022-01-18 14:32:30,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270874879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554272743] [2022-01-18 14:32:30,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:32:30,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:30,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:30,329 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:30,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 14:32:30,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:32:30,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:30,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:30,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:30,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:30,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554272743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:30,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:30,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:30,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096673050] [2022-01-18 14:32:30,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:30,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:30,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:30,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:30,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:30,441 INFO L87 Difference]: Start difference. First operand 110 states and 289 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:30,619 INFO L93 Difference]: Finished difference Result 275 states and 525 transitions. [2022-01-18 14:32:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:32:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:30,620 INFO L225 Difference]: With dead ends: 275 [2022-01-18 14:32:30,620 INFO L226 Difference]: Without dead ends: 275 [2022-01-18 14:32:30,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=329, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:32:30,621 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 169 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:30,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 49 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-18 14:32:30,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 110. [2022-01-18 14:32:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6513761467889907) internal successors, (289), 109 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 289 transitions. [2022-01-18 14:32:30,624 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 289 transitions. Word has length 15 [2022-01-18 14:32:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:30,624 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 289 transitions. [2022-01-18 14:32:30,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 289 transitions. [2022-01-18 14:32:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:30,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:30,625 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:30,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:30,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:30,839 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:30,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1609825041, now seen corresponding path program 22 times [2022-01-18 14:32:30,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877657514] [2022-01-18 14:32:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:30,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:30,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877657514] [2022-01-18 14:32:30,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877657514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892066377] [2022-01-18 14:32:30,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:32:30,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:30,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:30,873 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:30,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 14:32:30,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:32:30,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:30,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:30,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:30,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:30,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892066377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:30,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:30,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:30,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632087549] [2022-01-18 14:32:30,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:30,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:30,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:30,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:30,981 INFO L87 Difference]: Start difference. First operand 110 states and 289 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:31,128 INFO L93 Difference]: Finished difference Result 195 states and 401 transitions. [2022-01-18 14:32:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 14:32:31,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:31,129 INFO L225 Difference]: With dead ends: 195 [2022-01-18 14:32:31,129 INFO L226 Difference]: Without dead ends: 193 [2022-01-18 14:32:31,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:32:31,129 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 81 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:31,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 49 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-18 14:32:31,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 110. [2022-01-18 14:32:31,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6422018348623855) internal successors, (288), 109 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 288 transitions. [2022-01-18 14:32:31,132 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 288 transitions. Word has length 15 [2022-01-18 14:32:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:31,132 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 288 transitions. [2022-01-18 14:32:31,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 288 transitions. [2022-01-18 14:32:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:31,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:31,133 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:31,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:31,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:31,333 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:31,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:31,334 INFO L85 PathProgramCache]: Analyzing trace with hash 111565565, now seen corresponding path program 23 times [2022-01-18 14:32:31,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:31,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729014000] [2022-01-18 14:32:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:31,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:31,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:31,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729014000] [2022-01-18 14:32:31,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729014000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:31,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873284571] [2022-01-18 14:32:31,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:32:31,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:31,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:31,370 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:31,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 14:32:31,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:32:31,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:31,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:31,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873284571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:31,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:31,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:31,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458222509] [2022-01-18 14:32:31,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:31,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:31,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:31,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:31,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:31,481 INFO L87 Difference]: Start difference. First operand 110 states and 288 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:31,705 INFO L93 Difference]: Finished difference Result 294 states and 549 transitions. [2022-01-18 14:32:31,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:32:31,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:31,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:31,714 INFO L225 Difference]: With dead ends: 294 [2022-01-18 14:32:31,715 INFO L226 Difference]: Without dead ends: 294 [2022-01-18 14:32:31,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=475, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:32:31,715 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 136 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:31,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 79 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-18 14:32:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 110. [2022-01-18 14:32:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6422018348623855) internal successors, (288), 109 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 288 transitions. [2022-01-18 14:32:31,729 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 288 transitions. Word has length 15 [2022-01-18 14:32:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:31,729 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 288 transitions. [2022-01-18 14:32:31,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 288 transitions. [2022-01-18 14:32:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:31,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:31,730 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:31,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:31,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 14:32:31,949 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -865122543, now seen corresponding path program 24 times [2022-01-18 14:32:31,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891870599] [2022-01-18 14:32:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:31,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:31,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:31,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891870599] [2022-01-18 14:32:31,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891870599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:31,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074062561] [2022-01-18 14:32:31,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:32:31,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:31,991 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:31,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 14:32:32,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:32:32,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:32,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:32,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:32,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074062561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:32,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:32,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 14:32:32,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732015865] [2022-01-18 14:32:32,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:32,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:32,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:32,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:32,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:32,096 INFO L87 Difference]: Start difference. First operand 110 states and 288 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:32,187 INFO L93 Difference]: Finished difference Result 156 states and 378 transitions. [2022-01-18 14:32:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:32:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:32,188 INFO L225 Difference]: With dead ends: 156 [2022-01-18 14:32:32,188 INFO L226 Difference]: Without dead ends: 153 [2022-01-18 14:32:32,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:32:32,188 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:32,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 11 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-18 14:32:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2022-01-18 14:32:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.63302752293578) internal successors, (287), 109 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 287 transitions. [2022-01-18 14:32:32,191 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 287 transitions. Word has length 15 [2022-01-18 14:32:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:32,191 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 287 transitions. [2022-01-18 14:32:32,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 287 transitions. [2022-01-18 14:32:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:32,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:32,192 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:32,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:32,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 14:32:32,392 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:32,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:32,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1600970561, now seen corresponding path program 25 times [2022-01-18 14:32:32,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:32,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927709546] [2022-01-18 14:32:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:32,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:32,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:32,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927709546] [2022-01-18 14:32:32,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927709546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:32,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609301671] [2022-01-18 14:32:32,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:32:32,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:32,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:32,430 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:32,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 14:32:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:32,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:32,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:32,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:32,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609301671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:32,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:32,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 14:32:32,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228612346] [2022-01-18 14:32:32,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:32,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:32,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:32,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:32,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:32,549 INFO L87 Difference]: Start difference. First operand 110 states and 287 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:32,769 INFO L93 Difference]: Finished difference Result 256 states and 515 transitions. [2022-01-18 14:32:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:32:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:32,770 INFO L225 Difference]: With dead ends: 256 [2022-01-18 14:32:32,770 INFO L226 Difference]: Without dead ends: 256 [2022-01-18 14:32:32,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:32:32,771 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 139 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:32,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 45 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-18 14:32:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 123. [2022-01-18 14:32:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.6885245901639343) internal successors, (328), 122 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 328 transitions. [2022-01-18 14:32:32,774 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 328 transitions. Word has length 15 [2022-01-18 14:32:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:32,774 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 328 transitions. [2022-01-18 14:32:32,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 328 transitions. [2022-01-18 14:32:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:32,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:32,775 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:32,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:32,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 14:32:32,987 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash 23218281, now seen corresponding path program 26 times [2022-01-18 14:32:32,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:32,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960600151] [2022-01-18 14:32:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:32,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:33,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960600151] [2022-01-18 14:32:33,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960600151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670579926] [2022-01-18 14:32:33,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:32:33,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:33,044 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:33,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 14:32:33,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:32:33,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:33,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:33,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:33,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670579926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:33,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:33,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:33,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231839002] [2022-01-18 14:32:33,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:33,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:33,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:33,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:33,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:33,189 INFO L87 Difference]: Start difference. First operand 123 states and 328 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:33,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:33,492 INFO L93 Difference]: Finished difference Result 311 states and 588 transitions. [2022-01-18 14:32:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:32:33,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:33,494 INFO L225 Difference]: With dead ends: 311 [2022-01-18 14:32:33,494 INFO L226 Difference]: Without dead ends: 305 [2022-01-18 14:32:33,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=495, Invalid=987, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:32:33,495 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 168 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:33,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 39 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:33,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-18 14:32:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 123. [2022-01-18 14:32:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.6311475409836067) internal successors, (321), 122 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 321 transitions. [2022-01-18 14:32:33,498 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 321 transitions. Word has length 15 [2022-01-18 14:32:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:33,498 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 321 transitions. [2022-01-18 14:32:33,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 321 transitions. [2022-01-18 14:32:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:33,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:33,498 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:33,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:33,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:33,709 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:33,709 INFO L85 PathProgramCache]: Analyzing trace with hash 686306359, now seen corresponding path program 27 times [2022-01-18 14:32:33,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:33,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143469049] [2022-01-18 14:32:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:33,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:33,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:33,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143469049] [2022-01-18 14:32:33,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143469049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:33,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730726677] [2022-01-18 14:32:33,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:32:33,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:33,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:33,746 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:33,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 14:32:33,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:32:33,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:33,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:33,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:33,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:33,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730726677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:33,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:33,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:33,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481732636] [2022-01-18 14:32:33,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:33,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:33,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:33,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:33,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:33,862 INFO L87 Difference]: Start difference. First operand 123 states and 321 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:33,920 INFO L93 Difference]: Finished difference Result 199 states and 438 transitions. [2022-01-18 14:32:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:32:33,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:33,921 INFO L225 Difference]: With dead ends: 199 [2022-01-18 14:32:33,921 INFO L226 Difference]: Without dead ends: 199 [2022-01-18 14:32:33,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:33,921 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:33,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 43 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-18 14:32:33,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 128. [2022-01-18 14:32:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6692913385826773) internal successors, (339), 127 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 339 transitions. [2022-01-18 14:32:33,924 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 339 transitions. Word has length 15 [2022-01-18 14:32:33,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:33,924 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 339 transitions. [2022-01-18 14:32:33,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 339 transitions. [2022-01-18 14:32:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:33,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:33,925 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:33,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:34,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:34,140 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:34,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1595229769, now seen corresponding path program 28 times [2022-01-18 14:32:34,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:34,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253829343] [2022-01-18 14:32:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:34,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:34,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:34,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253829343] [2022-01-18 14:32:34,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253829343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:34,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043941589] [2022-01-18 14:32:34,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:32:34,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:34,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:34,176 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:34,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 14:32:34,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:32:34,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:34,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:34,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:34,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:34,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043941589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:34,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:34,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:34,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592201737] [2022-01-18 14:32:34,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:34,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:34,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:34,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:34,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:34,287 INFO L87 Difference]: Start difference. First operand 128 states and 339 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:34,392 INFO L93 Difference]: Finished difference Result 208 states and 448 transitions. [2022-01-18 14:32:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:32:34,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:34,393 INFO L225 Difference]: With dead ends: 208 [2022-01-18 14:32:34,393 INFO L226 Difference]: Without dead ends: 207 [2022-01-18 14:32:34,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:32:34,394 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:34,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 33 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-18 14:32:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 128. [2022-01-18 14:32:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6535433070866143) internal successors, (337), 127 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 337 transitions. [2022-01-18 14:32:34,397 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 337 transitions. Word has length 15 [2022-01-18 14:32:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:34,397 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 337 transitions. [2022-01-18 14:32:34,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 337 transitions. [2022-01-18 14:32:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:34,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:34,397 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:34,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 14:32:34,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:34,607 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:34,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1833653575, now seen corresponding path program 29 times [2022-01-18 14:32:34,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:34,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442282069] [2022-01-18 14:32:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:34,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:34,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:34,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442282069] [2022-01-18 14:32:34,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442282069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:34,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423735476] [2022-01-18 14:32:34,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:32:34,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:34,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:34,641 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:34,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 14:32:34,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:32:34,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:34,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:34,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:34,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:34,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423735476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:34,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:34,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:34,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205536766] [2022-01-18 14:32:34,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:34,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:34,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:34,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:34,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:34,764 INFO L87 Difference]: Start difference. First operand 128 states and 337 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:34,925 INFO L93 Difference]: Finished difference Result 284 states and 560 transitions. [2022-01-18 14:32:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:32:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:34,926 INFO L225 Difference]: With dead ends: 284 [2022-01-18 14:32:34,926 INFO L226 Difference]: Without dead ends: 284 [2022-01-18 14:32:34,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=338, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:32:34,926 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 146 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:34,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 49 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-18 14:32:34,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 127. [2022-01-18 14:32:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.642857142857143) internal successors, (333), 126 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 333 transitions. [2022-01-18 14:32:34,929 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 333 transitions. Word has length 15 [2022-01-18 14:32:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:34,929 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 333 transitions. [2022-01-18 14:32:34,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 333 transitions. [2022-01-18 14:32:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:34,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:34,930 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:34,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:35,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 14:32:35,145 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1844430873, now seen corresponding path program 30 times [2022-01-18 14:32:35,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:35,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540282526] [2022-01-18 14:32:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:35,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:35,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:35,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540282526] [2022-01-18 14:32:35,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540282526] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:35,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48470230] [2022-01-18 14:32:35,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:32:35,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:35,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:35,181 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:35,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 14:32:35,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:32:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:35,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:35,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:35,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48470230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:35,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:35,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:35,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953761385] [2022-01-18 14:32:35,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:35,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:35,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:35,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:35,292 INFO L87 Difference]: Start difference. First operand 127 states and 333 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:35,404 INFO L93 Difference]: Finished difference Result 212 states and 449 transitions. [2022-01-18 14:32:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:32:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:35,406 INFO L225 Difference]: With dead ends: 212 [2022-01-18 14:32:35,406 INFO L226 Difference]: Without dead ends: 210 [2022-01-18 14:32:35,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:32:35,406 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:35,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 37 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-18 14:32:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 127. [2022-01-18 14:32:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.634920634920635) internal successors, (332), 126 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 332 transitions. [2022-01-18 14:32:35,409 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 332 transitions. Word has length 15 [2022-01-18 14:32:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:35,409 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 332 transitions. [2022-01-18 14:32:35,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 332 transitions. [2022-01-18 14:32:35,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:35,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:35,409 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:35,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:35,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:35,619 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash -123040267, now seen corresponding path program 31 times [2022-01-18 14:32:35,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:35,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680180748] [2022-01-18 14:32:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:35,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:35,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680180748] [2022-01-18 14:32:35,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680180748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180467526] [2022-01-18 14:32:35,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:32:35,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:35,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:35,660 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:35,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 14:32:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:35,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:35,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:35,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:35,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180467526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:35,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:35,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:35,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958849625] [2022-01-18 14:32:35,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:35,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:35,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:35,780 INFO L87 Difference]: Start difference. First operand 127 states and 332 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:36,003 INFO L93 Difference]: Finished difference Result 299 states and 576 transitions. [2022-01-18 14:32:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:32:36,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:36,004 INFO L225 Difference]: With dead ends: 299 [2022-01-18 14:32:36,004 INFO L226 Difference]: Without dead ends: 299 [2022-01-18 14:32:36,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=555, Unknown=0, NotChecked=0, Total=870 [2022-01-18 14:32:36,005 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 162 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:36,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 65 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:36,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-18 14:32:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 127. [2022-01-18 14:32:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.634920634920635) internal successors, (332), 126 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 332 transitions. [2022-01-18 14:32:36,008 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 332 transitions. Word has length 15 [2022-01-18 14:32:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:36,008 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 332 transitions. [2022-01-18 14:32:36,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:36,008 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 332 transitions. [2022-01-18 14:32:36,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:36,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:36,008 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:36,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:36,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:36,215 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1099728375, now seen corresponding path program 32 times [2022-01-18 14:32:36,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:36,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310589565] [2022-01-18 14:32:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:36,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:36,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310589565] [2022-01-18 14:32:36,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310589565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406822689] [2022-01-18 14:32:36,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:32:36,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:36,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:36,252 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:36,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 14:32:36,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:32:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:36,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:36,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:36,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406822689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:36,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:36,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 14:32:36,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653116760] [2022-01-18 14:32:36,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:36,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:36,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:36,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:36,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:36,352 INFO L87 Difference]: Start difference. First operand 127 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:36,447 INFO L93 Difference]: Finished difference Result 180 states and 425 transitions. [2022-01-18 14:32:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:32:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:36,448 INFO L225 Difference]: With dead ends: 180 [2022-01-18 14:32:36,448 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 14:32:36,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:32:36,449 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:36,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 31 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 14:32:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 127. [2022-01-18 14:32:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.626984126984127) internal successors, (331), 126 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 331 transitions. [2022-01-18 14:32:36,451 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 331 transitions. Word has length 15 [2022-01-18 14:32:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:36,451 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 331 transitions. [2022-01-18 14:32:36,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 331 transitions. [2022-01-18 14:32:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:36,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:36,452 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:36,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:36,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 14:32:36,652 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1366364729, now seen corresponding path program 33 times [2022-01-18 14:32:36,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:36,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125500774] [2022-01-18 14:32:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:36,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:36,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:36,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125500774] [2022-01-18 14:32:36,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125500774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:36,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849917377] [2022-01-18 14:32:36,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:32:36,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:36,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:36,684 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:36,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 14:32:36,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:32:36,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:36,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:36,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:36,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849917377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:36,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:36,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 14:32:36,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482315129] [2022-01-18 14:32:36,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:36,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:36,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:36,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:36,809 INFO L87 Difference]: Start difference. First operand 127 states and 331 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:37,010 INFO L93 Difference]: Finished difference Result 223 states and 454 transitions. [2022-01-18 14:32:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:32:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:37,011 INFO L225 Difference]: With dead ends: 223 [2022-01-18 14:32:37,011 INFO L226 Difference]: Without dead ends: 223 [2022-01-18 14:32:37,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:32:37,012 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:37,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 63 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:37,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-18 14:32:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 127. [2022-01-18 14:32:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.626984126984127) internal successors, (331), 126 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 331 transitions. [2022-01-18 14:32:37,014 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 331 transitions. Word has length 15 [2022-01-18 14:32:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:37,014 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 331 transitions. [2022-01-18 14:32:37,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 331 transitions. [2022-01-18 14:32:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:37,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:37,015 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:37,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 14:32:37,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 14:32:37,227 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash 511212583, now seen corresponding path program 34 times [2022-01-18 14:32:37,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:37,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312450451] [2022-01-18 14:32:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:37,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:37,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:37,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312450451] [2022-01-18 14:32:37,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312450451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:37,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71030773] [2022-01-18 14:32:37,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:32:37,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:37,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:37,267 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:37,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 14:32:37,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:32:37,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:37,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:37,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:37,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:37,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71030773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:37,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:37,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 14:32:37,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574019990] [2022-01-18 14:32:37,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:37,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:32:37,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:32:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:32:37,356 INFO L87 Difference]: Start difference. First operand 127 states and 331 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:37,436 INFO L93 Difference]: Finished difference Result 169 states and 412 transitions. [2022-01-18 14:32:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:32:37,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:37,437 INFO L225 Difference]: With dead ends: 169 [2022-01-18 14:32:37,437 INFO L226 Difference]: Without dead ends: 165 [2022-01-18 14:32:37,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:32:37,438 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:37,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 15 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:32:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-18 14:32:37,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2022-01-18 14:32:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.619047619047619) internal successors, (330), 126 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 330 transitions. [2022-01-18 14:32:37,440 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 330 transitions. Word has length 15 [2022-01-18 14:32:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:37,440 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 330 transitions. [2022-01-18 14:32:37,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 330 transitions. [2022-01-18 14:32:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:37,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:37,441 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:37,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 14:32:37,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 14:32:37,641 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:37,641 INFO L85 PathProgramCache]: Analyzing trace with hash 293279349, now seen corresponding path program 35 times [2022-01-18 14:32:37,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:37,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744853704] [2022-01-18 14:32:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:37,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:37,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744853704] [2022-01-18 14:32:37,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744853704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860186794] [2022-01-18 14:32:37,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:32:37,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:37,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:37,677 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:37,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 14:32:37,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:32:37,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:37,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:37,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:37,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:37,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860186794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:37,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:37,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 14:32:37,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020267889] [2022-01-18 14:32:37,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:37,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:32:37,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:32:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:32:37,768 INFO L87 Difference]: Start difference. First operand 127 states and 330 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:37,960 INFO L93 Difference]: Finished difference Result 215 states and 468 transitions. [2022-01-18 14:32:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:32:37,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:37,961 INFO L225 Difference]: With dead ends: 215 [2022-01-18 14:32:37,961 INFO L226 Difference]: Without dead ends: 215 [2022-01-18 14:32:37,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:32:37,962 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:37,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-18 14:32:37,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 133. [2022-01-18 14:32:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.643939393939394) internal successors, (349), 132 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 349 transitions. [2022-01-18 14:32:37,964 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 349 transitions. Word has length 15 [2022-01-18 14:32:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:37,965 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 349 transitions. [2022-01-18 14:32:37,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 349 transitions. [2022-01-18 14:32:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:37,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:37,965 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:37,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:38,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 14:32:38,178 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:38,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1340372081, now seen corresponding path program 36 times [2022-01-18 14:32:38,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:38,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928110332] [2022-01-18 14:32:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:38,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:38,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928110332] [2022-01-18 14:32:38,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928110332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679037915] [2022-01-18 14:32:38,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:32:38,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:38,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:38,212 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:38,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 14:32:38,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:32:38,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:38,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:38,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:38,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:38,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679037915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:38,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:38,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:38,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652519734] [2022-01-18 14:32:38,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:38,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:38,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:38,329 INFO L87 Difference]: Start difference. First operand 133 states and 349 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:38,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:38,644 INFO L93 Difference]: Finished difference Result 310 states and 618 transitions. [2022-01-18 14:32:38,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:32:38,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:38,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:38,645 INFO L225 Difference]: With dead ends: 310 [2022-01-18 14:32:38,645 INFO L226 Difference]: Without dead ends: 306 [2022-01-18 14:32:38,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=488, Invalid=994, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 14:32:38,646 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 116 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:38,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 59 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-18 14:32:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 139. [2022-01-18 14:32:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.6884057971014492) internal successors, (371), 138 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 371 transitions. [2022-01-18 14:32:38,649 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 371 transitions. Word has length 15 [2022-01-18 14:32:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:38,649 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 371 transitions. [2022-01-18 14:32:38,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 371 transitions. [2022-01-18 14:32:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:38,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:38,650 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:38,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:38,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 14:32:38,850 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:38,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2003460159, now seen corresponding path program 37 times [2022-01-18 14:32:38,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:38,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815464513] [2022-01-18 14:32:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:38,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:38,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815464513] [2022-01-18 14:32:38,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815464513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154363231] [2022-01-18 14:32:38,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:32:38,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:38,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:38,882 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:38,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 14:32:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:38,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:38,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:38,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:38,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154363231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:38,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:38,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:38,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499166958] [2022-01-18 14:32:38,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:38,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:38,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:39,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:39,000 INFO L87 Difference]: Start difference. First operand 139 states and 371 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:39,064 INFO L93 Difference]: Finished difference Result 231 states and 519 transitions. [2022-01-18 14:32:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:32:39,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:39,065 INFO L225 Difference]: With dead ends: 231 [2022-01-18 14:32:39,065 INFO L226 Difference]: Without dead ends: 231 [2022-01-18 14:32:39,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:39,066 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:39,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 45 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-18 14:32:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 145. [2022-01-18 14:32:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.736111111111111) internal successors, (394), 144 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 394 transitions. [2022-01-18 14:32:39,068 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 394 transitions. Word has length 15 [2022-01-18 14:32:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:39,069 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 394 transitions. [2022-01-18 14:32:39,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 394 transitions. [2022-01-18 14:32:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:39,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:39,069 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:39,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:39,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 14:32:39,283 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:39,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:39,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1382583727, now seen corresponding path program 38 times [2022-01-18 14:32:39,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:39,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744111714] [2022-01-18 14:32:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:39,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:39,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744111714] [2022-01-18 14:32:39,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744111714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324211778] [2022-01-18 14:32:39,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:32:39,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:39,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:39,323 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:39,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 14:32:39,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:32:39,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:39,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:39,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:39,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:39,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324211778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:39,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:39,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:39,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922026744] [2022-01-18 14:32:39,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:39,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:39,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:39,436 INFO L87 Difference]: Start difference. First operand 145 states and 394 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:39,536 INFO L93 Difference]: Finished difference Result 230 states and 512 transitions. [2022-01-18 14:32:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 14:32:39,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:39,537 INFO L225 Difference]: With dead ends: 230 [2022-01-18 14:32:39,537 INFO L226 Difference]: Without dead ends: 229 [2022-01-18 14:32:39,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:32:39,538 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 105 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:39,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 29 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-18 14:32:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 145. [2022-01-18 14:32:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.7291666666666665) internal successors, (393), 144 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 393 transitions. [2022-01-18 14:32:39,542 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 393 transitions. Word has length 15 [2022-01-18 14:32:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:39,542 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 393 transitions. [2022-01-18 14:32:39,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 393 transitions. [2022-01-18 14:32:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:39,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:39,542 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:39,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 14:32:39,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 14:32:39,758 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash -516499775, now seen corresponding path program 39 times [2022-01-18 14:32:39,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:39,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885629999] [2022-01-18 14:32:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:39,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:39,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:39,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885629999] [2022-01-18 14:32:39,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885629999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:39,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114701968] [2022-01-18 14:32:39,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:32:39,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:39,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:39,795 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:39,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 14:32:39,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:32:39,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:39,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:39,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:32:39,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114701968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:39,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:39,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 14:32:39,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055110140] [2022-01-18 14:32:39,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:39,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:39,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:39,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:39,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:39,915 INFO L87 Difference]: Start difference. First operand 145 states and 393 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:40,077 INFO L93 Difference]: Finished difference Result 288 states and 597 transitions. [2022-01-18 14:32:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:32:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:40,079 INFO L225 Difference]: With dead ends: 288 [2022-01-18 14:32:40,079 INFO L226 Difference]: Without dead ends: 287 [2022-01-18 14:32:40,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=379, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:32:40,079 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 214 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:40,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 29 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-18 14:32:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 146. [2022-01-18 14:32:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.6551724137931036) internal successors, (385), 145 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 385 transitions. [2022-01-18 14:32:40,082 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 385 transitions. Word has length 15 [2022-01-18 14:32:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:40,083 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 385 transitions. [2022-01-18 14:32:40,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 385 transitions. [2022-01-18 14:32:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:40,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:40,083 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:40,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:40,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 14:32:40,287 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash -527277073, now seen corresponding path program 40 times [2022-01-18 14:32:40,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077687205] [2022-01-18 14:32:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:40,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:40,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:40,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077687205] [2022-01-18 14:32:40,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077687205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342997082] [2022-01-18 14:32:40,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:32:40,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:40,325 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:40,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 14:32:40,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:32:40,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:40,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:40,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:40,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:40,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342997082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:40,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:40,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:40,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679316609] [2022-01-18 14:32:40,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:40,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:40,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:40,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:40,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:40,430 INFO L87 Difference]: Start difference. First operand 146 states and 385 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:40,541 INFO L93 Difference]: Finished difference Result 232 states and 503 transitions. [2022-01-18 14:32:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:32:40,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:40,542 INFO L225 Difference]: With dead ends: 232 [2022-01-18 14:32:40,542 INFO L226 Difference]: Without dead ends: 230 [2022-01-18 14:32:40,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:32:40,551 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:40,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 37 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-18 14:32:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2022-01-18 14:32:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.6482758620689655) internal successors, (384), 145 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 384 transitions. [2022-01-18 14:32:40,554 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 384 transitions. Word has length 15 [2022-01-18 14:32:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:40,554 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 384 transitions. [2022-01-18 14:32:40,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 384 transitions. [2022-01-18 14:32:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:40,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:40,555 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:40,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:40,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:40,763 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:40,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:40,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1194113533, now seen corresponding path program 41 times [2022-01-18 14:32:40,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:40,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600846087] [2022-01-18 14:32:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:40,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:40,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600846087] [2022-01-18 14:32:40,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600846087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491897776] [2022-01-18 14:32:40,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:32:40,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:40,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:40,798 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:40,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 14:32:40,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:32:40,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:40,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:40,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:40,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:40,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491897776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:40,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:40,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 14:32:40,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789598307] [2022-01-18 14:32:40,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:40,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 14:32:40,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 14:32:40,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:32:40,934 INFO L87 Difference]: Start difference. First operand 146 states and 384 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:41,191 INFO L93 Difference]: Finished difference Result 308 states and 614 transitions. [2022-01-18 14:32:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 14:32:41,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:41,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:41,192 INFO L225 Difference]: With dead ends: 308 [2022-01-18 14:32:41,192 INFO L226 Difference]: Without dead ends: 308 [2022-01-18 14:32:41,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=370, Invalid=686, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:32:41,194 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:41,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 75 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-18 14:32:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 144. [2022-01-18 14:32:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.6363636363636362) internal successors, (377), 143 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 377 transitions. [2022-01-18 14:32:41,197 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 377 transitions. Word has length 15 [2022-01-18 14:32:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:41,197 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 377 transitions. [2022-01-18 14:32:41,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 377 transitions. [2022-01-18 14:32:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:41,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:41,198 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:41,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:41,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:41,398 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:41,399 INFO L85 PathProgramCache]: Analyzing trace with hash 217425425, now seen corresponding path program 42 times [2022-01-18 14:32:41,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:41,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804201188] [2022-01-18 14:32:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:41,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:41,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:41,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804201188] [2022-01-18 14:32:41,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804201188] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:41,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858093940] [2022-01-18 14:32:41,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:32:41,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:41,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:41,434 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:41,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 14:32:41,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:32:41,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:41,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:41,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:41,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858093940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:41,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:41,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 14:32:41,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210324870] [2022-01-18 14:32:41,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:41,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:41,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:41,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:41,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:41,536 INFO L87 Difference]: Start difference. First operand 144 states and 377 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:41,629 INFO L93 Difference]: Finished difference Result 199 states and 472 transitions. [2022-01-18 14:32:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:32:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:41,630 INFO L225 Difference]: With dead ends: 199 [2022-01-18 14:32:41,630 INFO L226 Difference]: Without dead ends: 196 [2022-01-18 14:32:41,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:32:41,631 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:41,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 15 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:32:41,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-18 14:32:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2022-01-18 14:32:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.629370629370629) internal successors, (376), 143 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 376 transitions. [2022-01-18 14:32:41,633 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 376 transitions. Word has length 15 [2022-01-18 14:32:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:41,633 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 376 transitions. [2022-01-18 14:32:41,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 376 transitions. [2022-01-18 14:32:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:41,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:41,634 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:41,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:41,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 14:32:41,850 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1611448767, now seen corresponding path program 43 times [2022-01-18 14:32:41,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:41,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480459897] [2022-01-18 14:32:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:41,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:41,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:41,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480459897] [2022-01-18 14:32:41,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480459897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:41,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647260101] [2022-01-18 14:32:41,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:32:41,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:41,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:41,888 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:41,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 14:32:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:41,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:41,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:41,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:41,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647260101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:41,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:41,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 14:32:41,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31920695] [2022-01-18 14:32:41,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:41,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 14:32:41,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 14:32:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-18 14:32:41,999 INFO L87 Difference]: Start difference. First operand 144 states and 376 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:42,259 INFO L93 Difference]: Finished difference Result 248 states and 529 transitions. [2022-01-18 14:32:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:32:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:42,260 INFO L225 Difference]: With dead ends: 248 [2022-01-18 14:32:42,260 INFO L226 Difference]: Without dead ends: 248 [2022-01-18 14:32:42,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:32:42,261 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:42,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-18 14:32:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 148. [2022-01-18 14:32:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.6462585034013606) internal successors, (389), 147 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 389 transitions. [2022-01-18 14:32:42,263 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 389 transitions. Word has length 15 [2022-01-18 14:32:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:42,264 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 389 transitions. [2022-01-18 14:32:42,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 389 transitions. [2022-01-18 14:32:42,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:42,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:42,264 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:42,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 14:32:42,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 14:32:42,465 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1828366383, now seen corresponding path program 44 times [2022-01-18 14:32:42,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:42,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42983067] [2022-01-18 14:32:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:42,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:42,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:42,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42983067] [2022-01-18 14:32:42,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42983067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237884921] [2022-01-18 14:32:42,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:32:42,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:42,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:42,500 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:42,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 14:32:42,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:32:42,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:42,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:42,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:42,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:42,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237884921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:42,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:42,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 14:32:42,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256608458] [2022-01-18 14:32:42,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:42,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:32:42,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:42,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:32:42,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:32:42,604 INFO L87 Difference]: Start difference. First operand 148 states and 389 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:42,698 INFO L93 Difference]: Finished difference Result 202 states and 482 transitions. [2022-01-18 14:32:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:32:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:42,699 INFO L225 Difference]: With dead ends: 202 [2022-01-18 14:32:42,699 INFO L226 Difference]: Without dead ends: 198 [2022-01-18 14:32:42,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:32:42,699 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:42,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 25 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-18 14:32:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2022-01-18 14:32:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.639455782312925) internal successors, (388), 147 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 388 transitions. [2022-01-18 14:32:42,702 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 388 transitions. Word has length 15 [2022-01-18 14:32:42,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:42,702 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 388 transitions. [2022-01-18 14:32:42,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 388 transitions. [2022-01-18 14:32:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:42,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:42,702 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:42,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 14:32:42,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 14:32:42,903 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:42,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1610433149, now seen corresponding path program 45 times [2022-01-18 14:32:42,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:42,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317010680] [2022-01-18 14:32:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:42,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:42,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317010680] [2022-01-18 14:32:42,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317010680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441266703] [2022-01-18 14:32:42,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:32:42,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:42,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:42,938 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:42,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 14:32:42,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:32:42,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:42,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:42,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:42,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:43,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441266703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:43,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:43,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 14:32:43,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58624062] [2022-01-18 14:32:43,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:43,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 14:32:43,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:43,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 14:32:43,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:32:43,033 INFO L87 Difference]: Start difference. First operand 148 states and 388 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:43,232 INFO L93 Difference]: Finished difference Result 222 states and 508 transitions. [2022-01-18 14:32:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:32:43,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:43,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:43,233 INFO L225 Difference]: With dead ends: 222 [2022-01-18 14:32:43,233 INFO L226 Difference]: Without dead ends: 222 [2022-01-18 14:32:43,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:32:43,233 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:43,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 23 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-18 14:32:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 154. [2022-01-18 14:32:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.65359477124183) internal successors, (406), 153 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 406 transitions. [2022-01-18 14:32:43,236 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 406 transitions. Word has length 15 [2022-01-18 14:32:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:43,236 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 406 transitions. [2022-01-18 14:32:43,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 406 transitions. [2022-01-18 14:32:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:43,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:43,237 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:43,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:43,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:43,451 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash 227928529, now seen corresponding path program 46 times [2022-01-18 14:32:43,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:43,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648837322] [2022-01-18 14:32:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:43,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:43,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:43,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648837322] [2022-01-18 14:32:43,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648837322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:43,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436976811] [2022-01-18 14:32:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:32:43,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:43,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:43,512 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:43,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 14:32:43,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:32:43,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:43,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:43,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:43,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436976811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:43,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:43,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 14:32:43,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668002678] [2022-01-18 14:32:43,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:43,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:32:43,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:32:43,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:32:43,610 INFO L87 Difference]: Start difference. First operand 154 states and 406 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:43,693 INFO L93 Difference]: Finished difference Result 196 states and 486 transitions. [2022-01-18 14:32:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:32:43,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:43,694 INFO L225 Difference]: With dead ends: 196 [2022-01-18 14:32:43,694 INFO L226 Difference]: Without dead ends: 191 [2022-01-18 14:32:43,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:32:43,695 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:43,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 11 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:32:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-18 14:32:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 153. [2022-01-18 14:32:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.6578947368421053) internal successors, (404), 152 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 404 transitions. [2022-01-18 14:32:43,697 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 404 transitions. Word has length 15 [2022-01-18 14:32:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:43,698 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 404 transitions. [2022-01-18 14:32:43,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 404 transitions. [2022-01-18 14:32:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 14:32:43,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:43,698 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:43,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:43,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 14:32:43,899 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1590442559, now seen corresponding path program 47 times [2022-01-18 14:32:43,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:43,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689909507] [2022-01-18 14:32:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:43,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:43,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:43,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689909507] [2022-01-18 14:32:43,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689909507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:43,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545093944] [2022-01-18 14:32:43,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:32:43,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:43,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:43,938 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:43,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 14:32:43,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:32:43,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 14:32:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:43,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:44,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545093944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:44,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:44,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 14:32:44,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613044929] [2022-01-18 14:32:44,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:44,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:32:44,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:32:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:32:44,029 INFO L87 Difference]: Start difference. First operand 153 states and 404 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:44,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:44,171 INFO L93 Difference]: Finished difference Result 231 states and 552 transitions. [2022-01-18 14:32:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:32:44,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 14:32:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:44,172 INFO L225 Difference]: With dead ends: 231 [2022-01-18 14:32:44,172 INFO L226 Difference]: Without dead ends: 231 [2022-01-18 14:32:44,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:32:44,172 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:44,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-18 14:32:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 161. [2022-01-18 14:32:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.6625) internal successors, (426), 160 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 426 transitions. [2022-01-18 14:32:44,175 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 426 transitions. Word has length 15 [2022-01-18 14:32:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:44,175 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 426 transitions. [2022-01-18 14:32:44,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 426 transitions. [2022-01-18 14:32:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 14:32:44,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:44,176 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:44,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 14:32:44,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:44,384 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash -949990882, now seen corresponding path program 48 times [2022-01-18 14:32:44,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:44,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352584254] [2022-01-18 14:32:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:44,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:32:44,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352584254] [2022-01-18 14:32:44,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352584254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43615579] [2022-01-18 14:32:44,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:32:44,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:44,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:44,455 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:44,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 14:32:44,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:32:44,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:32:44,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 14:32:44,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 14:32:44,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:32:44,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43615579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:32:44,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:32:44,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2022-01-18 14:32:44,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391851607] [2022-01-18 14:32:44,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:32:44,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 14:32:44,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:32:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 14:32:44,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 14:32:44,629 INFO L87 Difference]: Start difference. First operand 161 states and 426 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:44,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:32:44,791 INFO L93 Difference]: Finished difference Result 557 states and 1455 transitions. [2022-01-18 14:32:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:32:44,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 14:32:44,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:32:44,793 INFO L225 Difference]: With dead ends: 557 [2022-01-18 14:32:44,794 INFO L226 Difference]: Without dead ends: 552 [2022-01-18 14:32:44,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:32:44,794 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 113 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:32:44,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 23 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:32:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-18 14:32:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 317. [2022-01-18 14:32:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6297468354430378) internal successors, (831), 316 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 831 transitions. [2022-01-18 14:32:44,800 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 831 transitions. Word has length 16 [2022-01-18 14:32:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:32:44,800 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 831 transitions. [2022-01-18 14:32:44,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:32:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 831 transitions. [2022-01-18 14:32:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 14:32:44,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:32:44,801 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:32:44,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 14:32:45,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 14:32:45,015 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:32:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:32:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1859061101, now seen corresponding path program 49 times [2022-01-18 14:32:45,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:32:45,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501217739] [2022-01-18 14:32:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:32:45,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:32:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:45,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:32:45,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501217739] [2022-01-18 14:32:45,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501217739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:32:45,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208422664] [2022-01-18 14:32:45,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:32:45,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:32:45,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:32:45,066 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:32:45,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 14:32:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:32:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 14:32:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:32:45,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 14:32:45,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2022-01-18 14:32:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:32:46,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:32:47,837 INFO L353 Elim1Store]: treesize reduction 40, result has 95.8 percent of original size [2022-01-18 14:32:47,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 30 new quantified variables, introduced 120 case distinctions, treesize of input 35 treesize of output 980 Received shutdown request... [2022-01-18 14:46:00,959 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 14:46:00,960 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 14:46:00,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 14:46:00,978 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:46:01,008 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 14:46:01,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 14:46:01,161 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. [2022-01-18 14:46:01,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 14:46:01,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 14:46:01,164 INFO L732 BasicCegarLoop]: Path program histogram: [49, 2, 1, 1] [2022-01-18 14:46:01,165 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 14:46:01,166 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 14:46:01,167 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 02:46:01 BasicIcfg [2022-01-18 14:46:01,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 14:46:01,167 INFO L158 Benchmark]: Toolchain (without parser) took 852288.46ms. Allocated memory was 394.3MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 356.8MB in the beginning and 746.3MB in the end (delta: -389.5MB). Peak memory consumption was 916.0MB. Max. memory is 16.0GB. [2022-01-18 14:46:01,167 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 394.3MB. Free memory was 357.9MB in the beginning and 357.7MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:46:01,167 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.19ms. Allocated memory is still 394.3MB. Free memory was 356.6MB in the beginning and 355.1MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 14:46:01,167 INFO L158 Benchmark]: Boogie Preprocessor took 9.48ms. Allocated memory is still 394.3MB. Free memory was 355.1MB in the beginning and 354.2MB in the end (delta: 907.8kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:46:01,167 INFO L158 Benchmark]: RCFGBuilder took 246.79ms. Allocated memory is still 394.3MB. Free memory was 354.0MB in the beginning and 343.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 14:46:01,168 INFO L158 Benchmark]: TraceAbstraction took 852010.53ms. Allocated memory was 394.3MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 343.2MB in the beginning and 746.3MB in the end (delta: -403.1MB). Peak memory consumption was 901.3MB. Max. memory is 16.0GB. [2022-01-18 14:46:01,168 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09ms. Allocated memory is still 394.3MB. Free memory was 357.9MB in the beginning and 357.7MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.19ms. Allocated memory is still 394.3MB. Free memory was 356.6MB in the beginning and 355.1MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 9.48ms. Allocated memory is still 394.3MB. Free memory was 355.1MB in the beginning and 354.2MB in the end (delta: 907.8kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 246.79ms. Allocated memory is still 394.3MB. Free memory was 354.0MB in the beginning and 343.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 852010.53ms. Allocated memory was 394.3MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 343.2MB in the beginning and 746.3MB in the end (delta: -403.1MB). Peak memory consumption was 901.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 851.9s, OverallIterations: 53, TraceHistogramMax: 8, PathProgramHistogramMax: 49, EmptinessCheckTime: 0.0s, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4239 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4239 mSDsluCounter, 1890 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4533 mSDsCounter, 1200 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8090 IncrementalHoareTripleChecker+Invalid, 9290 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1200 mSolverCounterUnsat, 312 mSDtfsCounter, 8090 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2157 GetRequests, 1063 SyntacticMatches, 83 SemanticMatches, 1011 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6041 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=317occurred in iteration=52, InterpolantAutomatonStates: 887, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 52 MinimizatonAttempts, 4444 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 36.0s InterpolantComputationTime, 1469 NumberOfCodeBlocks, 1469 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 2039 ConstructedInterpolants, 0 QuantifiedInterpolants, 11173 SizeOfPredicates, 85 NumberOfNonLiveVariables, 2669 ConjunctsInSsa, 434 ConjunctsInUnsatCore, 150 InterpolantComputations, 3 PerfectInterpolantSequences, 776/1991 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown