/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/bitvector/soft_float_3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 21:56:22,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 21:56:22,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 21:56:22,420 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 21:56:22,420 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 21:56:22,441 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 21:56:22,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 21:56:22,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 21:56:22,442 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 21:56:22,443 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 21:56:22,443 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 21:56:22,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 21:56:22,444 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 21:56:22,444 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 21:56:22,445 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 21:56:22,445 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 21:56:22,445 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 21:56:22,446 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 21:56:22,446 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 21:56:22,446 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 21:56:22,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 21:56:22,450 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 21:56:22,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 21:56:22,450 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 21:56:22,450 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 21:56:22,451 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 21:56:22,451 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 21:56:22,451 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 21:56:22,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 21:56:22,452 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 21:56:22,452 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 21:56:22,452 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 21:56:22,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:56:22,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 21:56:22,453 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 21:56:22,453 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 21:56:22,453 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 21:56:22,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 21:56:22,454 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 21:56:22,454 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 21:56:22,454 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 21:56:22,458 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 21:56:22,458 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 21:56:22,458 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 21:56:22,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 21:56:22,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 21:56:22,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 21:56:22,659 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 21:56:22,659 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 21:56:22,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_3a.c.cil.c [2023-12-18 21:56:23,629 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 21:56:23,839 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 21:56:23,840 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_3a.c.cil.c [2023-12-18 21:56:23,847 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b643f01a6/c1794b9909eb4012aa333c0c35d12cdd/FLAGa85290c68 [2023-12-18 21:56:23,859 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b643f01a6/c1794b9909eb4012aa333c0c35d12cdd [2023-12-18 21:56:23,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 21:56:23,862 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 21:56:23,864 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 21:56:23,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 21:56:23,867 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 21:56:23,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:56:23" (1/1) ... [2023-12-18 21:56:23,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252743c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:23, skipping insertion in model container [2023-12-18 21:56:23,868 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:56:23" (1/1) ... [2023-12-18 21:56:23,899 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 21:56:23,990 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_3a.c.cil.c[728,741] [2023-12-18 21:56:24,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:56:24,044 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 21:56:24,052 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_3a.c.cil.c[728,741] [2023-12-18 21:56:24,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:56:24,105 INFO L206 MainTranslator]: Completed translation [2023-12-18 21:56:24,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24 WrapperNode [2023-12-18 21:56:24,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 21:56:24,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 21:56:24,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 21:56:24,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 21:56:24,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,149 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2023-12-18 21:56:24,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 21:56:24,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 21:56:24,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 21:56:24,150 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 21:56:24,164 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,168 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,189 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-18 21:56:24,192 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,192 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,195 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,198 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 21:56:24,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 21:56:24,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 21:56:24,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 21:56:24,202 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (1/1) ... [2023-12-18 21:56:24,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:56:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:24,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-18 21:56:24,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-18 21:56:24,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 21:56:24,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 21:56:24,280 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-18 21:56:24,281 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-18 21:56:24,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 21:56:24,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 21:56:24,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-18 21:56:24,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-18 21:56:24,351 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 21:56:24,352 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 21:56:24,653 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 21:56:24,667 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 21:56:24,668 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-18 21:56:24,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:56:24 BoogieIcfgContainer [2023-12-18 21:56:24,673 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 21:56:24,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 21:56:24,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 21:56:24,678 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 21:56:24,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:56:23" (1/3) ... [2023-12-18 21:56:24,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5055c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:56:24, skipping insertion in model container [2023-12-18 21:56:24,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:24" (2/3) ... [2023-12-18 21:56:24,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5055c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:56:24, skipping insertion in model container [2023-12-18 21:56:24,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:56:24" (3/3) ... [2023-12-18 21:56:24,680 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2023-12-18 21:56:24,691 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 21:56:24,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 21:56:24,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 21:56:24,737 INFO L357 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@319dd9ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 21:56:24,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 21:56:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 56 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 21:56:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 21:56:24,757 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:24,757 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:24,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:24,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:24,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1956785923, now seen corresponding path program 1 times [2023-12-18 21:56:24,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:24,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415353871] [2023-12-18 21:56:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:24,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 21:56:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:25,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:25,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415353871] [2023-12-18 21:56:25,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415353871] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:25,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:25,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 21:56:25,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659627549] [2023-12-18 21:56:25,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:25,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:56:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:56:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:25,091 INFO L87 Difference]: Start difference. First operand has 63 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 56 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:25,127 INFO L93 Difference]: Finished difference Result 126 states and 205 transitions. [2023-12-18 21:56:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:56:25,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2023-12-18 21:56:25,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:25,138 INFO L225 Difference]: With dead ends: 126 [2023-12-18 21:56:25,138 INFO L226 Difference]: Without dead ends: 59 [2023-12-18 21:56:25,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:25,144 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:25,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 173 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-18 21:56:25,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-18 21:56:25,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.5) internal successors, (78), 52 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 21:56:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 87 transitions. [2023-12-18 21:56:25,179 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 87 transitions. Word has length 35 [2023-12-18 21:56:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:25,181 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 87 transitions. [2023-12-18 21:56:25,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 87 transitions. [2023-12-18 21:56:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 21:56:25,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:25,185 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:25,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 21:56:25,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:25,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:25,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1533427075, now seen corresponding path program 1 times [2023-12-18 21:56:25,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:25,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183824320] [2023-12-18 21:56:25,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:25,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 21:56:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:25,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:25,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183824320] [2023-12-18 21:56:25,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183824320] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:25,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:25,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:56:25,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657569656] [2023-12-18 21:56:25,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:25,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:25,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:25,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:25,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:56:25,303 INFO L87 Difference]: Start difference. First operand 59 states and 87 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:25,352 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2023-12-18 21:56:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:56:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-12-18 21:56:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:25,354 INFO L225 Difference]: With dead ends: 69 [2023-12-18 21:56:25,354 INFO L226 Difference]: Without dead ends: 59 [2023-12-18 21:56:25,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 21:56:25,355 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:25,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 246 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-18 21:56:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-18 21:56:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 52 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 21:56:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 86 transitions. [2023-12-18 21:56:25,366 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 86 transitions. Word has length 37 [2023-12-18 21:56:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:25,366 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 86 transitions. [2023-12-18 21:56:25,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 86 transitions. [2023-12-18 21:56:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 21:56:25,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:25,368 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:25,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 21:56:25,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:25,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash 724080449, now seen corresponding path program 1 times [2023-12-18 21:56:25,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:25,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310885180] [2023-12-18 21:56:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:25,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 21:56:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:25,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:25,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310885180] [2023-12-18 21:56:25,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310885180] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:25,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005187714] [2023-12-18 21:56:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:25,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:25,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:25,491 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) [2023-12-18 21:56:25,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 21:56:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:56:25,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:25,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005187714] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:25,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:56:25,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 8] total 14 [2023-12-18 21:56:25,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378570987] [2023-12-18 21:56:25,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:25,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 21:56:25,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:25,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 21:56:25,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:56:25,771 INFO L87 Difference]: Start difference. First operand 59 states and 86 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:25,834 INFO L93 Difference]: Finished difference Result 97 states and 142 transitions. [2023-12-18 21:56:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:56:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-12-18 21:56:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:25,839 INFO L225 Difference]: With dead ends: 97 [2023-12-18 21:56:25,839 INFO L226 Difference]: Without dead ends: 65 [2023-12-18 21:56:25,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:56:25,842 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 3 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:25,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 392 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-18 21:56:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-12-18 21:56:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 21:56:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 94 transitions. [2023-12-18 21:56:25,853 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 94 transitions. Word has length 37 [2023-12-18 21:56:25,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:25,853 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 94 transitions. [2023-12-18 21:56:25,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 94 transitions. [2023-12-18 21:56:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 21:56:25,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:25,854 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:25,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 21:56:26,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:26,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:26,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:26,057 INFO L85 PathProgramCache]: Analyzing trace with hash 982245887, now seen corresponding path program 1 times [2023-12-18 21:56:26,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:26,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712727660] [2023-12-18 21:56:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:26,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 21:56:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:26,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:26,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712727660] [2023-12-18 21:56:26,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712727660] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:26,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195252480] [2023-12-18 21:56:26,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:26,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:26,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:26,161 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) [2023-12-18 21:56:26,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 21:56:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 21:56:26,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:26,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:26,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195252480] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:26,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:26,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 6] total 14 [2023-12-18 21:56:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725154981] [2023-12-18 21:56:26,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:26,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 21:56:26,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 21:56:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:56:26,325 INFO L87 Difference]: Start difference. First operand 64 states and 94 transitions. Second operand has 14 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:56:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:26,510 INFO L93 Difference]: Finished difference Result 191 states and 294 transitions. [2023-12-18 21:56:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 21:56:26,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2023-12-18 21:56:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:26,513 INFO L225 Difference]: With dead ends: 191 [2023-12-18 21:56:26,513 INFO L226 Difference]: Without dead ends: 129 [2023-12-18 21:56:26,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-12-18 21:56:26,514 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 143 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:26,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 469 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-18 21:56:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2023-12-18 21:56:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 97 states have (on average 1.4329896907216495) internal successors, (139), 96 states have internal predecessors, (139), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-18 21:56:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2023-12-18 21:56:26,529 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 37 [2023-12-18 21:56:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:26,529 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2023-12-18 21:56:26,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:56:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2023-12-18 21:56:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-18 21:56:26,531 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:26,531 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:26,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-18 21:56:26,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-18 21:56:26,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:26,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:26,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1491967169, now seen corresponding path program 1 times [2023-12-18 21:56:26,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:26,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888849772] [2023-12-18 21:56:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:26,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 21:56:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:26,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:26,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888849772] [2023-12-18 21:56:26,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888849772] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:26,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620303740] [2023-12-18 21:56:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:26,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:26,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:26,863 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) [2023-12-18 21:56:26,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 21:56:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:26,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 21:56:26,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:56:26,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620303740] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:26,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:26,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-18 21:56:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600568600] [2023-12-18 21:56:26,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:26,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:26,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:26,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-18 21:56:26,957 INFO L87 Difference]: Start difference. First operand 108 states and 160 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:26,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:26,999 INFO L93 Difference]: Finished difference Result 214 states and 319 transitions. [2023-12-18 21:56:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:56:27,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-12-18 21:56:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:27,002 INFO L225 Difference]: With dead ends: 214 [2023-12-18 21:56:27,002 INFO L226 Difference]: Without dead ends: 112 [2023-12-18 21:56:27,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:56:27,004 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 18 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:27,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 200 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-18 21:56:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-12-18 21:56:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.43) internal successors, (143), 100 states have internal predecessors, (143), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-12-18 21:56:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 167 transitions. [2023-12-18 21:56:27,021 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 167 transitions. Word has length 42 [2023-12-18 21:56:27,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:27,021 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 167 transitions. [2023-12-18 21:56:27,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 167 transitions. [2023-12-18 21:56:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-18 21:56:27,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:27,027 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:27,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:27,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:27,231 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:27,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:27,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1039333619, now seen corresponding path program 1 times [2023-12-18 21:56:27,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:27,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320743366] [2023-12-18 21:56:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:27,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 21:56:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 21:56:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:27,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320743366] [2023-12-18 21:56:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320743366] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340804510] [2023-12-18 21:56:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:27,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:27,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:27,317 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) [2023-12-18 21:56:27,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 21:56:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 21:56:27,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:56:27,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:27,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340804510] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:27,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:27,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-18 21:56:27,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466962341] [2023-12-18 21:56:27,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:27,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:56:27,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:56:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:56:27,461 INFO L87 Difference]: Start difference. First operand 112 states and 167 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 21:56:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:27,608 INFO L93 Difference]: Finished difference Result 272 states and 425 transitions. [2023-12-18 21:56:27,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:56:27,609 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2023-12-18 21:56:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:27,610 INFO L225 Difference]: With dead ends: 272 [2023-12-18 21:56:27,610 INFO L226 Difference]: Without dead ends: 166 [2023-12-18 21:56:27,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:56:27,611 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 126 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:27,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 370 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-12-18 21:56:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 121. [2023-12-18 21:56:27,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.4495412844036697) internal successors, (158), 109 states have internal predecessors, (158), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-12-18 21:56:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 182 transitions. [2023-12-18 21:56:27,619 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 182 transitions. Word has length 45 [2023-12-18 21:56:27,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:27,619 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 182 transitions. [2023-12-18 21:56:27,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 21:56:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 182 transitions. [2023-12-18 21:56:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 21:56:27,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:27,620 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:27,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:27,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:27,825 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:27,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash 931821507, now seen corresponding path program 1 times [2023-12-18 21:56:27,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:27,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402125550] [2023-12-18 21:56:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:27,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 21:56:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-18 21:56:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:27,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402125550] [2023-12-18 21:56:27,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402125550] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260566077] [2023-12-18 21:56:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:27,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:27,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:27,863 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) [2023-12-18 21:56:27,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 21:56:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:27,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 21:56:27,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 21:56:27,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260566077] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:27,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2023-12-18 21:56:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138747450] [2023-12-18 21:56:27,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:27,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:56:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:56:27,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:27,917 INFO L87 Difference]: Start difference. First operand 121 states and 182 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:27,945 INFO L93 Difference]: Finished difference Result 243 states and 374 transitions. [2023-12-18 21:56:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:56:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-12-18 21:56:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:27,946 INFO L225 Difference]: With dead ends: 243 [2023-12-18 21:56:27,946 INFO L226 Difference]: Without dead ends: 128 [2023-12-18 21:56:27,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:27,947 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:27,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-18 21:56:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2023-12-18 21:56:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.4375) internal successors, (161), 112 states have internal predecessors, (161), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-12-18 21:56:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 185 transitions. [2023-12-18 21:56:27,953 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 185 transitions. Word has length 47 [2023-12-18 21:56:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:27,953 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 185 transitions. [2023-12-18 21:56:27,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 185 transitions. [2023-12-18 21:56:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 21:56:27,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:27,954 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:27,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:28,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:28,162 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:28,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1179265489, now seen corresponding path program 1 times [2023-12-18 21:56:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:28,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773632414] [2023-12-18 21:56:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 21:56:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:28,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:28,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773632414] [2023-12-18 21:56:28,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773632414] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:28,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145387120] [2023-12-18 21:56:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:28,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:28,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:28,248 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) [2023-12-18 21:56:28,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 21:56:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 21:56:28,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:28,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:28,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145387120] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:28,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:56:28,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 6] total 10 [2023-12-18 21:56:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388705230] [2023-12-18 21:56:28,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:28,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:28,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:28,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:56:28,371 INFO L87 Difference]: Start difference. First operand 124 states and 185 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:28,389 INFO L93 Difference]: Finished difference Result 145 states and 207 transitions. [2023-12-18 21:56:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:56:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-12-18 21:56:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:28,390 INFO L225 Difference]: With dead ends: 145 [2023-12-18 21:56:28,390 INFO L226 Difference]: Without dead ends: 139 [2023-12-18 21:56:28,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:56:28,391 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 3 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:28,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 232 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-18 21:56:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2023-12-18 21:56:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.4) internal successors, (175), 125 states have internal predecessors, (175), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-12-18 21:56:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2023-12-18 21:56:28,396 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 48 [2023-12-18 21:56:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:28,396 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2023-12-18 21:56:28,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2023-12-18 21:56:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 21:56:28,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:28,397 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:28,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:28,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:28,608 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:28,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:28,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1122007187, now seen corresponding path program 1 times [2023-12-18 21:56:28,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:28,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881178519] [2023-12-18 21:56:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:28,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 21:56:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:28,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:28,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881178519] [2023-12-18 21:56:28,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881178519] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:28,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:28,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-18 21:56:28,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875240697] [2023-12-18 21:56:28,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:28,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 21:56:28,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:28,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 21:56:28,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-18 21:56:28,671 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:28,694 INFO L93 Difference]: Finished difference Result 143 states and 204 transitions. [2023-12-18 21:56:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:56:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-12-18 21:56:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:28,696 INFO L225 Difference]: With dead ends: 143 [2023-12-18 21:56:28,696 INFO L226 Difference]: Without dead ends: 127 [2023-12-18 21:56:28,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-18 21:56:28,696 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 400 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 [2023-12-18 21:56:28,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 400 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-18 21:56:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-12-18 21:56:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.4) internal successors, (161), 116 states have internal predecessors, (161), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-18 21:56:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 182 transitions. [2023-12-18 21:56:28,701 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 182 transitions. Word has length 48 [2023-12-18 21:56:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:28,701 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 182 transitions. [2023-12-18 21:56:28,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 182 transitions. [2023-12-18 21:56:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 21:56:28,702 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:28,702 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:28,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-18 21:56:28,702 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:28,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:28,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1878689688, now seen corresponding path program 1 times [2023-12-18 21:56:28,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:28,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125307904] [2023-12-18 21:56:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:28,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-18 21:56:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-18 21:56:28,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:28,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125307904] [2023-12-18 21:56:28,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125307904] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:28,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71316888] [2023-12-18 21:56:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:28,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:28,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:28,780 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) [2023-12-18 21:56:28,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 21:56:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:28,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 21:56:28,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 21:56:28,860 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:28,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71316888] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:28,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:28,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-12-18 21:56:28,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981007785] [2023-12-18 21:56:28,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:28,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 21:56:28,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:28,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 21:56:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:56:28,862 INFO L87 Difference]: Start difference. First operand 127 states and 182 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:28,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:28,917 INFO L93 Difference]: Finished difference Result 269 states and 398 transitions. [2023-12-18 21:56:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 21:56:28,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2023-12-18 21:56:28,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:28,918 INFO L225 Difference]: With dead ends: 269 [2023-12-18 21:56:28,919 INFO L226 Difference]: Without dead ends: 148 [2023-12-18 21:56:28,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-18 21:56:28,919 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 18 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:28,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 279 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-18 21:56:28,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 131. [2023-12-18 21:56:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 119 states have (on average 1.3865546218487395) internal successors, (165), 120 states have internal predecessors, (165), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-18 21:56:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 186 transitions. [2023-12-18 21:56:28,925 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 186 transitions. Word has length 50 [2023-12-18 21:56:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:28,925 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 186 transitions. [2023-12-18 21:56:28,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 186 transitions. [2023-12-18 21:56:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 21:56:28,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:28,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:28,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:29,131 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:29,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1034684186, now seen corresponding path program 1 times [2023-12-18 21:56:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:29,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736085363] [2023-12-18 21:56:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-18 21:56:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:29,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736085363] [2023-12-18 21:56:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736085363] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760054392] [2023-12-18 21:56:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:29,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:29,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:29,240 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:56:29,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 21:56:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-18 21:56:29,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:56:29,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:29,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760054392] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:29,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:29,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2023-12-18 21:56:29,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510640052] [2023-12-18 21:56:29,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:29,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 21:56:29,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:29,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 21:56:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:56:29,468 INFO L87 Difference]: Start difference. First operand 131 states and 186 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:29,601 INFO L93 Difference]: Finished difference Result 274 states and 397 transitions. [2023-12-18 21:56:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:56:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2023-12-18 21:56:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:29,602 INFO L225 Difference]: With dead ends: 274 [2023-12-18 21:56:29,602 INFO L226 Difference]: Without dead ends: 149 [2023-12-18 21:56:29,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:56:29,603 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 32 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:29,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 252 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-18 21:56:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2023-12-18 21:56:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.3801652892561984) internal successors, (167), 122 states have internal predecessors, (167), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-18 21:56:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 188 transitions. [2023-12-18 21:56:29,608 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 188 transitions. Word has length 50 [2023-12-18 21:56:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:29,608 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 188 transitions. [2023-12-18 21:56:29,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 188 transitions. [2023-12-18 21:56:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-18 21:56:29,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:29,609 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:29,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-18 21:56:29,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-18 21:56:29,810 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:29,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash -621604532, now seen corresponding path program 1 times [2023-12-18 21:56:29,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:29,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919025884] [2023-12-18 21:56:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:29,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 21:56:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-18 21:56:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:29,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919025884] [2023-12-18 21:56:29,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919025884] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644121116] [2023-12-18 21:56:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:29,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:29,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:29,953 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) [2023-12-18 21:56:29,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 21:56:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:30,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 21:56:30,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:56:30,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:30,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644121116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:30,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:30,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2023-12-18 21:56:30,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308451601] [2023-12-18 21:56:30,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:30,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 21:56:30,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:30,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 21:56:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2023-12-18 21:56:30,621 INFO L87 Difference]: Start difference. First operand 133 states and 188 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-18 21:56:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:37,637 INFO L93 Difference]: Finished difference Result 300 states and 438 transitions. [2023-12-18 21:56:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 21:56:37,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-12-18 21:56:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:37,638 INFO L225 Difference]: With dead ends: 300 [2023-12-18 21:56:37,638 INFO L226 Difference]: Without dead ends: 173 [2023-12-18 21:56:37,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=249, Invalid=401, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:56:37,639 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 149 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:37,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 330 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-18 21:56:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-12-18 21:56:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 137. [2023-12-18 21:56:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.392) internal successors, (174), 126 states have internal predecessors, (174), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-18 21:56:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 195 transitions. [2023-12-18 21:56:37,644 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 195 transitions. Word has length 53 [2023-12-18 21:56:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:37,644 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 195 transitions. [2023-12-18 21:56:37,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-18 21:56:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 195 transitions. [2023-12-18 21:56:37,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-18 21:56:37,645 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:37,645 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:37,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:37,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:37,846 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:37,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash -838666454, now seen corresponding path program 1 times [2023-12-18 21:56:37,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:37,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099079063] [2023-12-18 21:56:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:37,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:37,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:37,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:37,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 21:56:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:37,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 21:56:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:37,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:37,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099079063] [2023-12-18 21:56:37,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099079063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:37,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109548821] [2023-12-18 21:56:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:37,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:37,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:37,972 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) [2023-12-18 21:56:37,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 21:56:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:38,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 21:56:38,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:56:38,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:38,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109548821] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:38,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:38,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-12-18 21:56:38,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28147030] [2023-12-18 21:56:38,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:38,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:56:38,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:56:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:56:38,234 INFO L87 Difference]: Start difference. First operand 137 states and 195 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 21:56:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:38,476 INFO L93 Difference]: Finished difference Result 404 states and 599 transitions. [2023-12-18 21:56:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 21:56:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-12-18 21:56:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:38,477 INFO L225 Difference]: With dead ends: 404 [2023-12-18 21:56:38,477 INFO L226 Difference]: Without dead ends: 273 [2023-12-18 21:56:38,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=568, Unknown=0, NotChecked=0, Total=930 [2023-12-18 21:56:38,479 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 476 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:38,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 457 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-18 21:56:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 151. [2023-12-18 21:56:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 139 states have (on average 1.4172661870503598) internal successors, (197), 140 states have internal predecessors, (197), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-18 21:56:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 218 transitions. [2023-12-18 21:56:38,487 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 218 transitions. Word has length 56 [2023-12-18 21:56:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:38,487 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 218 transitions. [2023-12-18 21:56:38,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 21:56:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 218 transitions. [2023-12-18 21:56:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-18 21:56:38,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:38,490 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:38,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:38,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 21:56:38,695 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:38,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:38,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1640416308, now seen corresponding path program 2 times [2023-12-18 21:56:38,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:38,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218307841] [2023-12-18 21:56:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:38,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:38,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:38,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:39,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-18 21:56:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:39,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-18 21:56:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:39,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:39,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218307841] [2023-12-18 21:56:39,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218307841] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:39,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041796436] [2023-12-18 21:56:39,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:56:39,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:39,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:39,034 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) [2023-12-18 21:56:39,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 21:56:39,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:56:39,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:56:39,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-18 21:56:39,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:39,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:40,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041796436] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:40,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:40,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 19] total 44 [2023-12-18 21:56:40,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392785070] [2023-12-18 21:56:40,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:40,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-18 21:56:40,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-18 21:56:40,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 21:56:40,383 INFO L87 Difference]: Start difference. First operand 151 states and 218 transitions. Second operand has 44 states, 40 states have (on average 3.1) internal successors, (124), 40 states have internal predecessors, (124), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:56:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:50,847 INFO L93 Difference]: Finished difference Result 694 states and 1196 transitions. [2023-12-18 21:56:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2023-12-18 21:56:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 3.1) internal successors, (124), 40 states have internal predecessors, (124), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2023-12-18 21:56:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:50,851 INFO L225 Difference]: With dead ends: 694 [2023-12-18 21:56:50,851 INFO L226 Difference]: Without dead ends: 543 [2023-12-18 21:56:50,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16372 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=5701, Invalid=39031, Unknown=0, NotChecked=0, Total=44732 [2023-12-18 21:56:50,862 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1447 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 4909 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 5114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 4909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:50,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 2126 Invalid, 5114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 4909 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-18 21:56:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-12-18 21:56:50,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 175. [2023-12-18 21:56:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 160 states have (on average 1.425) internal successors, (228), 162 states have internal predecessors, (228), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2023-12-18 21:56:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 264 transitions. [2023-12-18 21:56:50,883 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 264 transitions. Word has length 65 [2023-12-18 21:56:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:50,883 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 264 transitions. [2023-12-18 21:56:50,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 3.1) internal successors, (124), 40 states have internal predecessors, (124), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:56:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 264 transitions. [2023-12-18 21:56:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-18 21:56:50,884 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:50,884 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:50,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-18 21:56:51,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 21:56:51,114 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:51,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:51,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1354947189, now seen corresponding path program 1 times [2023-12-18 21:56:51,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:51,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394823563] [2023-12-18 21:56:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:51,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-12-18 21:56:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-12-18 21:56:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-12-18 21:56:51,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:51,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394823563] [2023-12-18 21:56:51,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394823563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:51,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742870038] [2023-12-18 21:56:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:51,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:51,240 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) [2023-12-18 21:56:51,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 21:56:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 21:56:51,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-18 21:56:51,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:51,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742870038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:51,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:51,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2023-12-18 21:56:51,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355808829] [2023-12-18 21:56:51,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:51,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 21:56:51,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:51,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 21:56:51,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:56:51,335 INFO L87 Difference]: Start difference. First operand 175 states and 264 transitions. Second operand has 8 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:51,406 INFO L93 Difference]: Finished difference Result 280 states and 423 transitions. [2023-12-18 21:56:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:56:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2023-12-18 21:56:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:51,407 INFO L225 Difference]: With dead ends: 280 [2023-12-18 21:56:51,407 INFO L226 Difference]: Without dead ends: 241 [2023-12-18 21:56:51,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:56:51,408 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 103 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:51,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 773 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-12-18 21:56:51,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 205. [2023-12-18 21:56:51,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 187 states have (on average 1.4331550802139037) internal successors, (268), 188 states have internal predecessors, (268), 10 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (44), 13 states have call predecessors, (44), 9 states have call successors, (44) [2023-12-18 21:56:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 322 transitions. [2023-12-18 21:56:51,416 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 322 transitions. Word has length 72 [2023-12-18 21:56:51,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:51,417 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 322 transitions. [2023-12-18 21:56:51,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 322 transitions. [2023-12-18 21:56:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-18 21:56:51,417 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:51,418 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:51,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-18 21:56:51,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 21:56:51,622 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:51,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:51,623 INFO L85 PathProgramCache]: Analyzing trace with hash 560990058, now seen corresponding path program 2 times [2023-12-18 21:56:51,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:51,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723119130] [2023-12-18 21:56:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:51,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-12-18 21:56:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 21:56:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723119130] [2023-12-18 21:56:51,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723119130] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967825118] [2023-12-18 21:56:51,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:56:51,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:51,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:51,870 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) [2023-12-18 21:56:51,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 21:56:51,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:56:51,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:56:51,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-18 21:56:51,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:56:52,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:52,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967825118] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:52,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2023-12-18 21:56:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371771844] [2023-12-18 21:56:52,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:52,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-18 21:56:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-18 21:56:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2023-12-18 21:56:52,386 INFO L87 Difference]: Start difference. First operand 205 states and 322 transitions. Second operand has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 38 states have internal predecessors, (140), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 21:56:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:52,935 INFO L93 Difference]: Finished difference Result 715 states and 1331 transitions. [2023-12-18 21:56:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-18 21:56:52,935 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 38 states have internal predecessors, (140), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2023-12-18 21:56:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:52,938 INFO L225 Difference]: With dead ends: 715 [2023-12-18 21:56:52,938 INFO L226 Difference]: Without dead ends: 522 [2023-12-18 21:56:52,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1409, Invalid=2251, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 21:56:52,940 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1147 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:52,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 533 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:56:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2023-12-18 21:56:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 231. [2023-12-18 21:56:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 213 states have (on average 1.460093896713615) internal successors, (311), 214 states have internal predecessors, (311), 10 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (44), 13 states have call predecessors, (44), 9 states have call successors, (44) [2023-12-18 21:56:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 365 transitions. [2023-12-18 21:56:52,978 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 365 transitions. Word has length 74 [2023-12-18 21:56:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:52,978 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 365 transitions. [2023-12-18 21:56:52,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 38 states have internal predecessors, (140), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 21:56:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 365 transitions. [2023-12-18 21:56:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-18 21:56:52,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:52,979 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:52,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:53,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-18 21:56:53,185 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:53,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1182238322, now seen corresponding path program 1 times [2023-12-18 21:56:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:53,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044189924] [2023-12-18 21:56:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:53,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:53,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:53,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:53,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-12-18 21:56:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:53,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-12-18 21:56:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-18 21:56:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:53,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044189924] [2023-12-18 21:56:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044189924] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:53,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483292649] [2023-12-18 21:56:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:53,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:53,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:53,305 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) [2023-12-18 21:56:53,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 21:56:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:53,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:56:53,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-12-18 21:56:53,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-18 21:56:53,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483292649] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:53,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:53,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 16 [2023-12-18 21:56:53,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752231613] [2023-12-18 21:56:53,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:53,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-18 21:56:53,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-18 21:56:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:56:53,475 INFO L87 Difference]: Start difference. First operand 231 states and 365 transitions. Second operand has 16 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-18 21:56:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:53,742 INFO L93 Difference]: Finished difference Result 249 states and 393 transitions. [2023-12-18 21:56:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 21:56:53,742 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 75 [2023-12-18 21:56:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:53,743 INFO L225 Difference]: With dead ends: 249 [2023-12-18 21:56:53,743 INFO L226 Difference]: Without dead ends: 212 [2023-12-18 21:56:53,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:56:53,744 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 26 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:53,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 865 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:56:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-12-18 21:56:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 202. [2023-12-18 21:56:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 185 states have (on average 1.4702702702702704) internal successors, (272), 187 states have internal predecessors, (272), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (34), 11 states have call predecessors, (34), 8 states have call successors, (34) [2023-12-18 21:56:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 315 transitions. [2023-12-18 21:56:53,753 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 315 transitions. Word has length 75 [2023-12-18 21:56:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:53,753 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 315 transitions. [2023-12-18 21:56:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-18 21:56:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 315 transitions. [2023-12-18 21:56:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-18 21:56:53,753 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:53,754 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:53,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:53,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:53,958 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:53,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:53,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1969212152, now seen corresponding path program 1 times [2023-12-18 21:56:53,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:53,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424905531] [2023-12-18 21:56:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:53,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-12-18 21:56:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-18 21:56:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 3 proven. 76 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:54,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:54,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424905531] [2023-12-18 21:56:54,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424905531] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150876416] [2023-12-18 21:56:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:54,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:54,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:54,245 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) [2023-12-18 21:56:54,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 21:56:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 21:56:54,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-12-18 21:56:54,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:54,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150876416] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:54,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:54,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-12-18 21:56:54,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727055114] [2023-12-18 21:56:54,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:54,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 21:56:54,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:54,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 21:56:54,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:56:54,396 INFO L87 Difference]: Start difference. First operand 202 states and 315 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:54,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:54,441 INFO L93 Difference]: Finished difference Result 253 states and 389 transitions. [2023-12-18 21:56:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:56:54,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 76 [2023-12-18 21:56:54,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:54,443 INFO L225 Difference]: With dead ends: 253 [2023-12-18 21:56:54,443 INFO L226 Difference]: Without dead ends: 242 [2023-12-18 21:56:54,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:56:54,443 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 63 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:54,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 365 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-12-18 21:56:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 203. [2023-12-18 21:56:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 186 states have (on average 1.467741935483871) internal successors, (273), 188 states have internal predecessors, (273), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (34), 11 states have call predecessors, (34), 8 states have call successors, (34) [2023-12-18 21:56:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 316 transitions. [2023-12-18 21:56:54,453 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 316 transitions. Word has length 76 [2023-12-18 21:56:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:54,453 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 316 transitions. [2023-12-18 21:56:54,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 316 transitions. [2023-12-18 21:56:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-18 21:56:54,454 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:54,454 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:54,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:54,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 21:56:54,658 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:54,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2067589706, now seen corresponding path program 1 times [2023-12-18 21:56:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:54,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807374884] [2023-12-18 21:56:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:54,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-12-18 21:56:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-12-18 21:56:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 3 proven. 76 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:54,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:54,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807374884] [2023-12-18 21:56:54,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807374884] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:54,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706494876] [2023-12-18 21:56:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:54,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:54,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:54,917 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) [2023-12-18 21:56:54,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 21:56:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:54,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-18 21:56:54,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 21:56:55,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:55,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706494876] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:55,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:55,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2023-12-18 21:56:55,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406300069] [2023-12-18 21:56:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:55,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 21:56:55,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 21:56:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:56:55,011 INFO L87 Difference]: Start difference. First operand 203 states and 316 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:55,051 INFO L93 Difference]: Finished difference Result 256 states and 392 transitions. [2023-12-18 21:56:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:56:55,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 76 [2023-12-18 21:56:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:55,052 INFO L225 Difference]: With dead ends: 256 [2023-12-18 21:56:55,052 INFO L226 Difference]: Without dead ends: 245 [2023-12-18 21:56:55,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:56:55,053 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 31 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:55,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 390 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-12-18 21:56:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 205. [2023-12-18 21:56:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 189 states have internal predecessors, (276), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (34), 12 states have call predecessors, (34), 8 states have call successors, (34) [2023-12-18 21:56:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 319 transitions. [2023-12-18 21:56:55,063 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 319 transitions. Word has length 76 [2023-12-18 21:56:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:55,063 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 319 transitions. [2023-12-18 21:56:55,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 319 transitions. [2023-12-18 21:56:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-18 21:56:55,064 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:55,064 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:55,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-18 21:56:55,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:55,269 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:55,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:55,270 INFO L85 PathProgramCache]: Analyzing trace with hash 283486966, now seen corresponding path program 2 times [2023-12-18 21:56:55,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:55,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699452351] [2023-12-18 21:56:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:55,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:55,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:55,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:55,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-12-18 21:56:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:55,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-12-18 21:56:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 3 proven. 76 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:55,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:55,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699452351] [2023-12-18 21:56:55,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699452351] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:55,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722326711] [2023-12-18 21:56:55,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:56:55,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:55,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:55,538 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) [2023-12-18 21:56:55,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 21:56:55,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:56:55,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:56:55,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-18 21:56:55,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 3 proven. 76 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:55,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 3 proven. 76 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:56,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722326711] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:56,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:56,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 19] total 43 [2023-12-18 21:56:56,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199591527] [2023-12-18 21:56:56,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:56,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-18 21:56:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:56,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-18 21:56:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2023-12-18 21:56:56,589 INFO L87 Difference]: Start difference. First operand 205 states and 319 transitions. Second operand has 43 states, 41 states have (on average 3.292682926829268) internal successors, (135), 40 states have internal predecessors, (135), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:57:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:57:06,007 INFO L93 Difference]: Finished difference Result 827 states and 1584 transitions. [2023-12-18 21:57:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2023-12-18 21:57:06,007 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 3.292682926829268) internal successors, (135), 40 states have internal predecessors, (135), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 76 [2023-12-18 21:57:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:57:06,013 INFO L225 Difference]: With dead ends: 827 [2023-12-18 21:57:06,013 INFO L226 Difference]: Without dead ends: 631 [2023-12-18 21:57:06,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12975 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5942, Invalid=29590, Unknown=0, NotChecked=0, Total=35532 [2023-12-18 21:57:06,028 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 2095 mSDsluCounter, 2123 mSDsCounter, 0 mSdLazyCounter, 3585 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 3848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 3585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:57:06,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2130 Valid, 2210 Invalid, 3848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 3585 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-18 21:57:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2023-12-18 21:57:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 207. [2023-12-18 21:57:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 190 states have (on average 1.4684210526315788) internal successors, (279), 190 states have internal predecessors, (279), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (34), 13 states have call predecessors, (34), 8 states have call successors, (34) [2023-12-18 21:57:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 322 transitions. [2023-12-18 21:57:06,079 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 322 transitions. Word has length 76 [2023-12-18 21:57:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:57:06,079 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 322 transitions. [2023-12-18 21:57:06,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 3.292682926829268) internal successors, (135), 40 states have internal predecessors, (135), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:57:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 322 transitions. [2023-12-18 21:57:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-18 21:57:06,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:57:06,080 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:57:06,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-18 21:57:06,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:06,284 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:57:06,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:57:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash 971850157, now seen corresponding path program 1 times [2023-12-18 21:57:06,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:57:06,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233476395] [2023-12-18 21:57:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:06,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:57:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:57:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:57:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 21:57:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 21:57:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-18 21:57:06,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:57:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233476395] [2023-12-18 21:57:06,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233476395] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:57:06,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:57:06,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:57:06,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563512902] [2023-12-18 21:57:06,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:57:06,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:57:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:57:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:57:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:57:06,357 INFO L87 Difference]: Start difference. First operand 207 states and 322 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:57:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:57:06,375 INFO L93 Difference]: Finished difference Result 227 states and 342 transitions. [2023-12-18 21:57:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:57:06,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 80 [2023-12-18 21:57:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:57:06,377 INFO L225 Difference]: With dead ends: 227 [2023-12-18 21:57:06,377 INFO L226 Difference]: Without dead ends: 216 [2023-12-18 21:57:06,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:57:06,378 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 3 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:57:06,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 243 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:57:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-12-18 21:57:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2023-12-18 21:57:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 196 states have (on average 1.4387755102040816) internal successors, (282), 196 states have internal predecessors, (282), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (34), 13 states have call predecessors, (34), 8 states have call successors, (34) [2023-12-18 21:57:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 325 transitions. [2023-12-18 21:57:06,386 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 325 transitions. Word has length 80 [2023-12-18 21:57:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:57:06,386 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 325 transitions. [2023-12-18 21:57:06,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:57:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 325 transitions. [2023-12-18 21:57:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-18 21:57:06,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:57:06,387 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:57:06,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-18 21:57:06,388 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:57:06,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:57:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2110164462, now seen corresponding path program 1 times [2023-12-18 21:57:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:57:06,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170260859] [2023-12-18 21:57:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:06,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:57:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:57:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:57:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 21:57:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 21:57:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 92 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-18 21:57:06,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:57:06,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170260859] [2023-12-18 21:57:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170260859] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:57:06,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456801811] [2023-12-18 21:57:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:06,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:06,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:57:06,721 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) [2023-12-18 21:57:06,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 21:57:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:06,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-18 21:57:06,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:57:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-18 21:57:07,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:57:07,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456801811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:57:07,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:57:07,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2023-12-18 21:57:07,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671058572] [2023-12-18 21:57:07,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:57:07,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:57:07,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:57:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:57:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-12-18 21:57:07,071 INFO L87 Difference]: Start difference. First operand 213 states and 325 transitions. Second operand has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:57:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:57:07,229 INFO L93 Difference]: Finished difference Result 253 states and 372 transitions. [2023-12-18 21:57:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 21:57:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 81 [2023-12-18 21:57:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:57:07,231 INFO L225 Difference]: With dead ends: 253 [2023-12-18 21:57:07,231 INFO L226 Difference]: Without dead ends: 221 [2023-12-18 21:57:07,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2023-12-18 21:57:07,232 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 64 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:57:07,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 827 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:57:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-12-18 21:57:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 211. [2023-12-18 21:57:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 194 states have (on average 1.443298969072165) internal successors, (280), 195 states have internal predecessors, (280), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 12 states have call predecessors, (32), 8 states have call successors, (32) [2023-12-18 21:57:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 321 transitions. [2023-12-18 21:57:07,241 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 321 transitions. Word has length 81 [2023-12-18 21:57:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:57:07,241 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 321 transitions. [2023-12-18 21:57:07,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:57:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 321 transitions. [2023-12-18 21:57:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-18 21:57:07,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:57:07,242 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:57:07,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-18 21:57:07,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:07,447 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:57:07,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:57:07,447 INFO L85 PathProgramCache]: Analyzing trace with hash 493020289, now seen corresponding path program 1 times [2023-12-18 21:57:07,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:57:07,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886704812] [2023-12-18 21:57:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:07,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:57:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:07,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:57:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:07,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:57:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:07,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 21:57:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:07,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-12-18 21:57:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 3 proven. 97 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:57:07,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:57:07,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886704812] [2023-12-18 21:57:07,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886704812] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:57:07,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573193477] [2023-12-18 21:57:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:07,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:07,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:57:07,737 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) [2023-12-18 21:57:07,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 21:57:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:08,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-18 21:57:08,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:57:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 97 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 21:57:08,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:57:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-12-18 21:57:09,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573193477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:57:09,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:57:09,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 12] total 41 [2023-12-18 21:57:09,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326163048] [2023-12-18 21:57:09,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:57:09,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 21:57:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:57:09,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 21:57:09,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 21:57:09,080 INFO L87 Difference]: Start difference. First operand 211 states and 321 transitions. Second operand has 41 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 37 states have internal predecessors, (142), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:57:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:57:12,679 INFO L93 Difference]: Finished difference Result 674 states and 1242 transitions. [2023-12-18 21:57:12,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-12-18 21:57:12,679 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 37 states have internal predecessors, (142), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 85 [2023-12-18 21:57:12,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:57:12,692 INFO L225 Difference]: With dead ends: 674 [2023-12-18 21:57:12,692 INFO L226 Difference]: Without dead ends: 454 [2023-12-18 21:57:12,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1310, Invalid=14440, Unknown=0, NotChecked=0, Total=15750 [2023-12-18 21:57:12,695 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 409 mSDsluCounter, 2321 mSDsCounter, 0 mSdLazyCounter, 5632 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 5709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 5632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-18 21:57:12,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 2405 Invalid, 5709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 5632 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-18 21:57:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-12-18 21:57:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 225. [2023-12-18 21:57:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 202 states have (on average 1.4257425742574257) internal successors, (288), 205 states have internal predecessors, (288), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 16 states have call predecessors, (71), 12 states have call successors, (71) [2023-12-18 21:57:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 372 transitions. [2023-12-18 21:57:12,745 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 372 transitions. Word has length 85 [2023-12-18 21:57:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:57:12,745 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 372 transitions. [2023-12-18 21:57:12,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 37 states have internal predecessors, (142), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:57:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 372 transitions. [2023-12-18 21:57:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-18 21:57:12,747 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:57:12,747 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:57:12,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 21:57:12,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:12,951 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:57:12,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:57:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash -738835889, now seen corresponding path program 2 times [2023-12-18 21:57:12,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:57:12,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579386133] [2023-12-18 21:57:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:12,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:57:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:57:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:57:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-12-18 21:57:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 21:57:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-18 21:57:13,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:57:13,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579386133] [2023-12-18 21:57:13,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579386133] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:57:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217922267] [2023-12-18 21:57:13,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:57:13,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:13,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:57:13,062 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) [2023-12-18 21:57:13,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 21:57:13,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:57:13,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:57:13,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:57:13,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:57:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-18 21:57:13,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:57:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-18 21:57:13,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217922267] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:57:13,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:57:13,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 13 [2023-12-18 21:57:13,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118091782] [2023-12-18 21:57:13,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:57:13,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 21:57:13,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:57:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 21:57:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:57:13,317 INFO L87 Difference]: Start difference. First operand 225 states and 372 transitions. Second operand has 13 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-18 21:57:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:57:13,414 INFO L93 Difference]: Finished difference Result 267 states and 421 transitions. [2023-12-18 21:57:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 21:57:13,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 88 [2023-12-18 21:57:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:57:13,415 INFO L225 Difference]: With dead ends: 267 [2023-12-18 21:57:13,415 INFO L226 Difference]: Without dead ends: 237 [2023-12-18 21:57:13,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:57:13,416 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 68 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:57:13,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 834 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:57:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-12-18 21:57:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 225. [2023-12-18 21:57:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 202 states have (on average 1.4158415841584158) internal successors, (286), 205 states have internal predecessors, (286), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 16 states have call predecessors, (71), 12 states have call successors, (71) [2023-12-18 21:57:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 370 transitions. [2023-12-18 21:57:13,427 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 370 transitions. Word has length 88 [2023-12-18 21:57:13,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:57:13,427 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 370 transitions. [2023-12-18 21:57:13,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-18 21:57:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 370 transitions. [2023-12-18 21:57:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-18 21:57:13,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:57:13,428 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:57:13,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-18 21:57:13,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-18 21:57:13,633 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:57:13,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:57:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1561986701, now seen corresponding path program 1 times [2023-12-18 21:57:13,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:57:13,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667569065] [2023-12-18 21:57:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:13,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:57:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:57:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:57:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-12-18 21:57:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-18 21:57:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:57:13,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:57:13,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667569065] [2023-12-18 21:57:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667569065] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:57:13,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068544570] [2023-12-18 21:57:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:13,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:13,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:57:13,928 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) [2023-12-18 21:57:13,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-18 21:57:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:14,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 21:57:14,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:57:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-18 21:57:14,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:57:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-18 21:57:14,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068544570] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:57:14,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:57:14,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 25 [2023-12-18 21:57:14,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371646502] [2023-12-18 21:57:14,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:57:14,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 21:57:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:57:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 21:57:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:57:14,689 INFO L87 Difference]: Start difference. First operand 225 states and 370 transitions. Second operand has 25 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-18 21:57:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:57:15,503 INFO L93 Difference]: Finished difference Result 478 states and 772 transitions. [2023-12-18 21:57:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 21:57:15,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 88 [2023-12-18 21:57:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:57:15,505 INFO L225 Difference]: With dead ends: 478 [2023-12-18 21:57:15,505 INFO L226 Difference]: Without dead ends: 278 [2023-12-18 21:57:15,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 21:57:15,506 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 217 mSDsluCounter, 1785 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:57:15,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1885 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 21:57:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-12-18 21:57:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 225. [2023-12-18 21:57:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 202 states have (on average 1.4108910891089108) internal successors, (285), 205 states have internal predecessors, (285), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 16 states have call predecessors, (71), 12 states have call successors, (71) [2023-12-18 21:57:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 369 transitions. [2023-12-18 21:57:15,526 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 369 transitions. Word has length 88 [2023-12-18 21:57:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:57:15,526 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 369 transitions. [2023-12-18 21:57:15,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-18 21:57:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 369 transitions. [2023-12-18 21:57:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-18 21:57:15,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:57:15,527 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:57:15,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-18 21:57:15,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-18 21:57:15,732 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:57:15,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:57:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2013269143, now seen corresponding path program 1 times [2023-12-18 21:57:15,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:57:15,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597309018] [2023-12-18 21:57:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:57:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:15,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:57:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:15,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:57:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:15,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-12-18 21:57:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:15,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-12-18 21:57:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-12-18 21:57:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:57:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597309018] [2023-12-18 21:57:15,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597309018] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:57:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293399068] [2023-12-18 21:57:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:15,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:57:15,804 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) [2023-12-18 21:57:15,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-18 21:57:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:16,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 21:57:16,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:57:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-12-18 21:57:16,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:57:16,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293399068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:57:16,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:57:16,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-18 21:57:16,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459397792] [2023-12-18 21:57:16,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:57:16,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:57:16,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:57:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:57:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-18 21:57:16,118 INFO L87 Difference]: Start difference. First operand 225 states and 369 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:57:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:57:16,154 INFO L93 Difference]: Finished difference Result 441 states and 746 transitions. [2023-12-18 21:57:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:57:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 92 [2023-12-18 21:57:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:57:16,156 INFO L225 Difference]: With dead ends: 441 [2023-12-18 21:57:16,156 INFO L226 Difference]: Without dead ends: 226 [2023-12-18 21:57:16,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-18 21:57:16,158 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:57:16,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:57:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-12-18 21:57:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 221. [2023-12-18 21:57:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 198 states have (on average 1.4090909090909092) internal successors, (279), 201 states have internal predecessors, (279), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 16 states have call predecessors, (71), 12 states have call successors, (71) [2023-12-18 21:57:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 363 transitions. [2023-12-18 21:57:16,172 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 363 transitions. Word has length 92 [2023-12-18 21:57:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:57:16,172 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 363 transitions. [2023-12-18 21:57:16,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:57:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 363 transitions. [2023-12-18 21:57:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-18 21:57:16,173 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:57:16,173 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:57:16,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-18 21:57:16,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-18 21:57:16,378 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:57:16,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:57:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1786095030, now seen corresponding path program 1 times [2023-12-18 21:57:16,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:57:16,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872327162] [2023-12-18 21:57:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:16,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:57:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:16,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:57:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:16,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:57:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:16,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-12-18 21:57:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-12-18 21:57:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 3 proven. 148 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:57:16,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:57:16,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872327162] [2023-12-18 21:57:16,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872327162] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:57:16,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537877166] [2023-12-18 21:57:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:16,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:16,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:57:16,696 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) [2023-12-18 21:57:16,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-18 21:57:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:17,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:57:17,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:57:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-12-18 21:57:17,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:57:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-12-18 21:57:17,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537877166] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:57:17,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:57:17,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 31 [2023-12-18 21:57:17,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241308435] [2023-12-18 21:57:17,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:57:17,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 21:57:17,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:57:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 21:57:17,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2023-12-18 21:57:17,995 INFO L87 Difference]: Start difference. First operand 221 states and 363 transitions. Second operand has 31 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-18 21:57:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:57:20,514 INFO L93 Difference]: Finished difference Result 469 states and 758 transitions. [2023-12-18 21:57:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-18 21:57:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 92 [2023-12-18 21:57:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:57:20,516 INFO L225 Difference]: With dead ends: 469 [2023-12-18 21:57:20,516 INFO L226 Difference]: Without dead ends: 273 [2023-12-18 21:57:20,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=737, Invalid=4665, Unknown=0, NotChecked=0, Total=5402 [2023-12-18 21:57:20,518 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 382 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-18 21:57:20,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1833 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-18 21:57:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-18 21:57:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 221. [2023-12-18 21:57:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 198 states have (on average 1.404040404040404) internal successors, (278), 201 states have internal predecessors, (278), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 16 states have call predecessors, (71), 12 states have call successors, (71) [2023-12-18 21:57:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 362 transitions. [2023-12-18 21:57:20,531 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 362 transitions. Word has length 92 [2023-12-18 21:57:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:57:20,532 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 362 transitions. [2023-12-18 21:57:20,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-18 21:57:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 362 transitions. [2023-12-18 21:57:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-18 21:57:20,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:57:20,533 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:57:20,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-18 21:57:20,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:20,738 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:57:20,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:57:20,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1759460876, now seen corresponding path program 3 times [2023-12-18 21:57:20,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:57:20,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158818153] [2023-12-18 21:57:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:57:20,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:57:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:20,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:57:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:20,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:57:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:21,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-12-18 21:57:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:21,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-12-18 21:57:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:57:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 3 proven. 367 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:57:21,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:57:21,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158818153] [2023-12-18 21:57:21,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158818153] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:57:21,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112027767] [2023-12-18 21:57:21,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:57:21,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:57:21,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:57:21,270 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) [2023-12-18 21:57:21,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-18 21:57:22,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-12-18 21:57:22,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:57:22,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-18 21:57:22,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:57:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 2 proven. 376 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:57:23,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:57:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 7 proven. 367 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:57:24,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112027767] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:57:24,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:57:24,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30, 29] total 75 [2023-12-18 21:57:24,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960205509] [2023-12-18 21:57:24,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:57:24,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-18 21:57:24,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:57:24,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-18 21:57:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=5062, Unknown=0, NotChecked=0, Total=5550 [2023-12-18 21:57:24,878 INFO L87 Difference]: Start difference. First operand 221 states and 362 transitions. Second operand has 75 states, 71 states have (on average 3.056338028169014) internal successors, (217), 71 states have internal predecessors, (217), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-18 21:57:35,166 WARN L293 SmtUtils]: Spent 9.28s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 21:57:44,872 WARN L293 SmtUtils]: Spent 7.01s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 21:57:52,647 WARN L293 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 21:58:11,114 WARN L293 SmtUtils]: Spent 12.61s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 21:58:20,095 WARN L293 SmtUtils]: Spent 8.65s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 21:59:48,905 WARN L293 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:00:01,452 WARN L293 SmtUtils]: Spent 7.72s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:00:07,851 WARN L293 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:00:14,745 WARN L293 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:00:40,704 WARN L293 SmtUtils]: Spent 6.51s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:00:49,550 WARN L293 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:00:54,903 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:01:22,600 WARN L293 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:02:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 22:02:23,211 INFO L93 Difference]: Finished difference Result 1291 states and 3238 transitions. [2023-12-18 22:02:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2023-12-18 22:02:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 71 states have (on average 3.056338028169014) internal successors, (217), 71 states have internal predecessors, (217), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) Word has length 95 [2023-12-18 22:02:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 22:02:23,219 INFO L225 Difference]: With dead ends: 1291 [2023-12-18 22:02:23,219 INFO L226 Difference]: Without dead ends: 1070 [2023-12-18 22:02:23,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 427 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74256 ImplicationChecksByTransitivity, 285.1s TimeCoverageRelationStatistics Valid=27466, Invalid=156146, Unknown=0, NotChecked=0, Total=183612 [2023-12-18 22:02:23,230 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 6990 mSDsluCounter, 5085 mSDsCounter, 0 mSdLazyCounter, 13370 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7065 SdHoareTripleChecker+Valid, 5211 SdHoareTripleChecker+Invalid, 14246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 13370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2023-12-18 22:02:23,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7065 Valid, 5211 Invalid, 14246 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [876 Valid, 13370 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2023-12-18 22:02:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2023-12-18 22:02:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 264. [2023-12-18 22:02:23,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 237 states have (on average 1.4345991561181435) internal successors, (340), 241 states have internal predecessors, (340), 16 states have call successors, (16), 3 states have call predecessors, (16), 10 states have return successors, (102), 19 states have call predecessors, (102), 15 states have call successors, (102) [2023-12-18 22:02:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 458 transitions. [2023-12-18 22:02:23,334 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 458 transitions. Word has length 95 [2023-12-18 22:02:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 22:02:23,334 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 458 transitions. [2023-12-18 22:02:23,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 71 states have (on average 3.056338028169014) internal successors, (217), 71 states have internal predecessors, (217), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-18 22:02:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 458 transitions. [2023-12-18 22:02:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-18 22:02:23,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 22:02:23,336 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 22:02:23,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-18 22:02:23,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-18 22:02:23,543 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 22:02:23,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 22:02:23,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1842102090, now seen corresponding path program 3 times [2023-12-18 22:02:23,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 22:02:23,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434511560] [2023-12-18 22:02:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 22:02:23,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 22:02:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:02:23,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 22:02:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:02:23,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 22:02:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:02:24,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-18 22:02:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:02:24,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-12-18 22:02:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:02:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 3 proven. 421 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 22:02:24,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 22:02:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434511560] [2023-12-18 22:02:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434511560] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 22:02:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200188801] [2023-12-18 22:02:24,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 22:02:24,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 22:02:24,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 22:02:24,175 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) [2023-12-18 22:02:24,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-18 22:02:25,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-12-18 22:02:25,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 22:02:25,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-18 22:02:25,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 22:02:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 3 proven. 421 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 22:02:26,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 22:02:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 3 proven. 421 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 22:02:27,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200188801] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 22:02:27,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 22:02:27,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 28] total 72 [2023-12-18 22:02:27,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735905529] [2023-12-18 22:02:27,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 22:02:27,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-12-18 22:02:27,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 22:02:27,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-12-18 22:02:27,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=4613, Unknown=0, NotChecked=0, Total=5112 [2023-12-18 22:02:27,875 INFO L87 Difference]: Start difference. First operand 264 states and 458 transitions. Second operand has 72 states, 70 states have (on average 3.2142857142857144) internal successors, (225), 70 states have internal predecessors, (225), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 22:02:34,185 WARN L293 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:02:43,172 WARN L293 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:03:04,237 WARN L293 SmtUtils]: Spent 10.70s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:03:17,563 WARN L293 SmtUtils]: Spent 12.96s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:03:25,333 WARN L293 SmtUtils]: Spent 7.58s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:03:55,341 WARN L293 SmtUtils]: Spent 7.25s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:05:15,545 WARN L293 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:05:28,025 WARN L293 SmtUtils]: Spent 9.92s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:05:36,764 WARN L293 SmtUtils]: Spent 7.92s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:05:51,188 WARN L293 SmtUtils]: Spent 9.98s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:05:59,404 WARN L293 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:06:07,054 WARN L293 SmtUtils]: Spent 7.04s on a formula simplification that was a NOOP. DAG size: 126 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:06:13,324 WARN L293 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:06:17,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-18 22:06:19,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-18 22:06:28,189 WARN L293 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:06:38,348 WARN L293 SmtUtils]: Spent 9.62s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:06:46,417 WARN L293 SmtUtils]: Spent 7.66s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:07:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 22:07:42,639 INFO L93 Difference]: Finished difference Result 1370 states and 3905 transitions. [2023-12-18 22:07:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2023-12-18 22:07:42,652 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 3.2142857142857144) internal successors, (225), 70 states have internal predecessors, (225), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 106 [2023-12-18 22:07:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 22:07:42,660 INFO L225 Difference]: With dead ends: 1370 [2023-12-18 22:07:42,660 INFO L226 Difference]: Without dead ends: 1119 [2023-12-18 22:07:42,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59953 ImplicationChecksByTransitivity, 294.9s TimeCoverageRelationStatistics Valid=25973, Invalid=124182, Unknown=1, NotChecked=0, Total=150156 [2023-12-18 22:07:42,673 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 9028 mSDsluCounter, 4868 mSDsCounter, 0 mSdLazyCounter, 12364 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9028 SdHoareTripleChecker+Valid, 4991 SdHoareTripleChecker+Invalid, 13425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 12364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-12-18 22:07:42,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9028 Valid, 4991 Invalid, 13425 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1061 Valid, 12364 Invalid, 0 Unknown, 0 Unchecked, 21.3s Time] [2023-12-18 22:07:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2023-12-18 22:07:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 261. [2023-12-18 22:07:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 238 states have (on average 1.449579831932773) internal successors, (345), 241 states have internal predecessors, (345), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 16 states have call predecessors, (71), 12 states have call successors, (71) [2023-12-18 22:07:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 429 transitions. [2023-12-18 22:07:42,924 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 429 transitions. Word has length 106 [2023-12-18 22:07:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 22:07:42,924 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 429 transitions. [2023-12-18 22:07:42,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 70 states have (on average 3.2142857142857144) internal successors, (225), 70 states have internal predecessors, (225), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 22:07:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 429 transitions. [2023-12-18 22:07:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-18 22:07:42,926 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 22:07:42,926 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 22:07:42,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-18 22:07:43,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-18 22:07:43,133 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 22:07:43,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 22:07:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1402243094, now seen corresponding path program 3 times [2023-12-18 22:07:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 22:07:43,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550457140] [2023-12-18 22:07:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 22:07:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 22:07:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:43,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 22:07:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:43,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 22:07:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:43,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-12-18 22:07:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:43,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-12-18 22:07:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 22:07:43,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 22:07:43,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550457140] [2023-12-18 22:07:43,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550457140] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 22:07:43,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333388250] [2023-12-18 22:07:43,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 22:07:43,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 22:07:43,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 22:07:43,781 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) [2023-12-18 22:07:43,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-18 22:07:44,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2023-12-18 22:07:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 22:07:44,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 22:07:44,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 22:07:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 20 proven. 737 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 22:07:44,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 22:07:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 22:07:45,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333388250] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 22:07:45,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 22:07:45,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2023-12-18 22:07:45,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798426407] [2023-12-18 22:07:45,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 22:07:45,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-18 22:07:45,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 22:07:45,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-18 22:07:45,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2023-12-18 22:07:45,510 INFO L87 Difference]: Start difference. First operand 261 states and 429 transitions. Second operand has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 22:07:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 22:07:47,294 INFO L93 Difference]: Finished difference Result 1093 states and 2480 transitions. [2023-12-18 22:07:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-18 22:07:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2023-12-18 22:07:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 22:07:47,299 INFO L225 Difference]: With dead ends: 1093 [2023-12-18 22:07:47,300 INFO L226 Difference]: Without dead ends: 857 [2023-12-18 22:07:47,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5555, Invalid=8965, Unknown=0, NotChecked=0, Total=14520 [2023-12-18 22:07:47,302 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 2256 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2256 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 22:07:47,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2256 Valid, 961 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 22:07:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-12-18 22:07:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 293. [2023-12-18 22:07:47,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 270 states have (on average 1.474074074074074) internal successors, (398), 273 states have internal predecessors, (398), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 16 states have call predecessors, (71), 12 states have call successors, (71) [2023-12-18 22:07:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 482 transitions. [2023-12-18 22:07:47,388 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 482 transitions. Word has length 110 [2023-12-18 22:07:47,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 22:07:47,388 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 482 transitions. [2023-12-18 22:07:47,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 22:07:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 482 transitions. [2023-12-18 22:07:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-18 22:07:47,389 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 22:07:47,389 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 22:07:47,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-18 22:07:47,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 22:07:47,594 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 22:07:47,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 22:07:47,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1771756587, now seen corresponding path program 1 times [2023-12-18 22:07:47,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 22:07:47,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053470434] [2023-12-18 22:07:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 22:07:47,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 22:07:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:47,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 22:07:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:47,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 22:07:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:48,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-12-18 22:07:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:48,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-12-18 22:07:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 3 proven. 472 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 22:07:48,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 22:07:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053470434] [2023-12-18 22:07:48,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053470434] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 22:07:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534337312] [2023-12-18 22:07:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 22:07:48,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 22:07:48,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 22:07:48,432 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) [2023-12-18 22:07:48,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-18 22:07:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 22:07:49,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-18 22:07:49,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 22:07:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 7 proven. 472 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 22:07:50,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 22:07:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 7 proven. 472 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 22:07:52,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534337312] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 22:07:52,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 22:07:52,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33, 33] total 84 [2023-12-18 22:07:52,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690804636] [2023-12-18 22:07:52,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 22:07:52,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-18 22:07:52,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 22:07:52,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-18 22:07:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=6366, Unknown=0, NotChecked=0, Total=6972 [2023-12-18 22:07:52,894 INFO L87 Difference]: Start difference. First operand 293 states and 482 transitions. Second operand has 84 states, 80 states have (on average 3.25) internal successors, (260), 80 states have internal predecessors, (260), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 22:08:04,720 WARN L293 SmtUtils]: Spent 9.83s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:08:24,274 WARN L293 SmtUtils]: Spent 16.06s on a formula simplification. DAG size of input: 127 DAG size of output: 126 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:08:44,217 WARN L293 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:08:51,603 WARN L293 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:09:00,527 WARN L293 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 115 DAG size of output: 114 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:09:17,399 WARN L293 SmtUtils]: Spent 6.97s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:09:26,275 WARN L293 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 120 DAG size of output: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:09:35,430 WARN L293 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 120 DAG size of output: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:09:56,501 WARN L293 SmtUtils]: Spent 20.90s on a formula simplification. DAG size of input: 142 DAG size of output: 141 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 22:09:57,040 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-18 22:09:57,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 119.2s TimeCoverageRelationStatistics Valid=2606, Invalid=13649, Unknown=1, NotChecked=0, Total=16256 [2023-12-18 22:09:57,044 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1249 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-12-18 22:09:57,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 314 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-12-18 22:09:57,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-18 22:09:57,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2023-12-18 22:09:57,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 22:09:57,245 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:665) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:269) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 37 more [2023-12-18 22:09:57,248 INFO L158 Benchmark]: Toolchain (without parser) took 813386.12ms. Allocated memory was 209.7MB in the beginning and 539.0MB in the end (delta: 329.3MB). Free memory was 160.5MB in the beginning and 212.5MB in the end (delta: -52.0MB). Peak memory consumption was 278.3MB. Max. memory is 8.0GB. [2023-12-18 22:09:57,248 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 209.7MB. Free memory is still 157.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 22:09:57,248 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.81ms. Allocated memory is still 209.7MB. Free memory was 160.1MB in the beginning and 146.5MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 22:09:57,249 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.73ms. Allocated memory is still 209.7MB. Free memory was 146.5MB in the beginning and 144.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 22:09:57,249 INFO L158 Benchmark]: Boogie Preprocessor took 50.48ms. Allocated memory is still 209.7MB. Free memory was 144.4MB in the beginning and 142.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 22:09:57,249 INFO L158 Benchmark]: RCFGBuilder took 471.56ms. Allocated memory is still 209.7MB. Free memory was 142.3MB in the beginning and 122.4MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-18 22:09:57,249 INFO L158 Benchmark]: TraceAbstraction took 812572.38ms. Allocated memory was 209.7MB in the beginning and 539.0MB in the end (delta: 329.3MB). Free memory was 122.0MB in the beginning and 212.5MB in the end (delta: -90.5MB). Peak memory consumption was 239.5MB. Max. memory is 8.0GB. [2023-12-18 22:09:57,254 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 209.7MB. Free memory is still 157.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 241.81ms. Allocated memory is still 209.7MB. Free memory was 160.1MB in the beginning and 146.5MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 43.73ms. Allocated memory is still 209.7MB. Free memory was 146.5MB in the beginning and 144.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.48ms. Allocated memory is still 209.7MB. Free memory was 144.4MB in the beginning and 142.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 471.56ms. Allocated memory is still 209.7MB. Free memory was 142.3MB in the beginning and 122.4MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 812572.38ms. Allocated memory was 209.7MB in the beginning and 539.0MB in the end (delta: 329.3MB). Free memory was 122.0MB in the beginning and 212.5MB in the end (delta: -90.5MB). Peak memory consumption was 239.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...