/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem14_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:55:10,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:55:10,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:55:10,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:55:10,764 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:55:10,780 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:55:10,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:55:10,781 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:55:10,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:55:10,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:55:10,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:55:10,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:55:10,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:55:10,782 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:55:10,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:55:10,782 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:55:10,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:55:10,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:55:10,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:55:10,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:55:10,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:55:10,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:55:10,783 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:55:10,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:55:10,787 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:55:10,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:55:10,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:55:10,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:55:10,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:55:10,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:55:10,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:55:10,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:55:10,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:55:10,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:55:10,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:55:10,789 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:55:10,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:55:10,789 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:55:10,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:55:10,789 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:55:10,789 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:55:10,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:55:11,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:55:11,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:55:11,016 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:55:11,016 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:55:11,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label46.c [2023-04-01 22:55:12,057 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:55:12,363 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:55:12,363 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label46.c [2023-04-01 22:55:12,373 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1147ba7a0/4675fff263e346229e8508f42a3c7908/FLAG267e1089c [2023-04-01 22:55:12,383 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1147ba7a0/4675fff263e346229e8508f42a3c7908 [2023-04-01 22:55:12,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:55:12,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:55:12,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:55:12,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:55:12,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:55:12,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764f4ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12, skipping insertion in model container [2023-04-01 22:55:12,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:55:12,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:55:12,618 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label46.c[4146,4159] [2023-04-01 22:55:12,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:55:12,776 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:55:12,790 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label46.c[4146,4159] [2023-04-01 22:55:12,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:55:12,870 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:55:12,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12 WrapperNode [2023-04-01 22:55:12,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:55:12,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:55:12,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:55:12,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:55:12,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,960 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:55:12,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:55:12,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:55:12,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:55:12,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (1/1) ... [2023-04-01 22:55:12,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:55:13,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:13,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:55:13,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:55:13,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:55:13,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:55:13,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:55:13,040 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:55:13,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:55:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:55:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:55:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:55:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:55:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:55:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:55:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:55:13,041 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:55:13,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:55:13,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:55:13,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:55:13,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:55:13,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:55:13,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:55:13,107 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:55:13,109 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:55:13,934 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:55:13,947 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:55:13,947 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:55:13,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:55:13 BoogieIcfgContainer [2023-04-01 22:55:13,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:55:13,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:55:13,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:55:13,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:55:13,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:55:12" (1/3) ... [2023-04-01 22:55:13,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280df4fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:55:13, skipping insertion in model container [2023-04-01 22:55:13,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:55:12" (2/3) ... [2023-04-01 22:55:13,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280df4fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:55:13, skipping insertion in model container [2023-04-01 22:55:13,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:55:13" (3/3) ... [2023-04-01 22:55:13,959 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label46.c [2023-04-01 22:55:13,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:55:13,971 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:55:14,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:55:14,030 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@c6c7319, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:55:14,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:55:14,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 254 states, 246 states have (on average 1.7276422764227641) internal successors, (425), 247 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:55:14,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 22:55:14,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:14,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:14,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:14,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1144756194, now seen corresponding path program 1 times [2023-04-01 22:55:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:14,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759366086] [2023-04-01 22:55:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:14,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:14,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:55:14,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:14,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759366086] [2023-04-01 22:55:14,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759366086] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:55:14,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:55:14,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 22:55:14,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575956939] [2023-04-01 22:55:14,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:55:14,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:55:14,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:55:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:55:14,442 INFO L87 Difference]: Start difference. First operand has 254 states, 246 states have (on average 1.7276422764227641) internal successors, (425), 247 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:55:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:15,857 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2023-04-01 22:55:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:55:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-01 22:55:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:15,875 INFO L225 Difference]: With dead ends: 886 [2023-04-01 22:55:15,875 INFO L226 Difference]: Without dead ends: 564 [2023-04-01 22:55:15,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:55:15,883 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1241 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:15,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 31 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 22:55:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-04-01 22:55:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2023-04-01 22:55:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 546 states have (on average 1.6282051282051282) internal successors, (889), 548 states have internal predecessors, (889), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 22:55:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2023-04-01 22:55:15,964 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 45 [2023-04-01 22:55:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:15,964 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2023-04-01 22:55:15,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:55:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2023-04-01 22:55:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 22:55:15,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:15,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:15,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:55:15,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:15,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash 282024218, now seen corresponding path program 1 times [2023-04-01 22:55:15,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:15,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962580048] [2023-04-01 22:55:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:15,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:16,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:16,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:55:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:16,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962580048] [2023-04-01 22:55:16,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962580048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:55:16,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:55:16,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:55:16,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335048691] [2023-04-01 22:55:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:55:16,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:55:16,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:55:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:55:16,423 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:55:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:17,475 INFO L93 Difference]: Finished difference Result 1698 states and 2816 transitions. [2023-04-01 22:55:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:55:17,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 131 [2023-04-01 22:55:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:17,481 INFO L225 Difference]: With dead ends: 1698 [2023-04-01 22:55:17,481 INFO L226 Difference]: Without dead ends: 1146 [2023-04-01 22:55:17,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:55:17,483 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 816 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:17,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 38 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 22:55:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2023-04-01 22:55:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 566. [2023-04-01 22:55:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 550 states have (on average 1.481818181818182) internal successors, (815), 556 states have internal predecessors, (815), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2023-04-01 22:55:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 839 transitions. [2023-04-01 22:55:17,508 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 839 transitions. Word has length 131 [2023-04-01 22:55:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:17,508 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 839 transitions. [2023-04-01 22:55:17,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:55:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 839 transitions. [2023-04-01 22:55:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-01 22:55:17,512 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:17,512 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:17,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:55:17,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:17,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 622458831, now seen corresponding path program 1 times [2023-04-01 22:55:17,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:17,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11151434] [2023-04-01 22:55:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:17,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:17,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:17,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:55:17,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11151434] [2023-04-01 22:55:17,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11151434] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215611655] [2023-04-01 22:55:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:17,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:17,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:17,737 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) [2023-04-01 22:55:17,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:55:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:17,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:55:17,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:55:17,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:55:17,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215611655] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:55:17,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:55:17,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:55:17,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457601808] [2023-04-01 22:55:17,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:55:17,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:55:17,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:55:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:55:17,891 INFO L87 Difference]: Start difference. First operand 566 states and 839 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:55:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:18,457 INFO L93 Difference]: Finished difference Result 1682 states and 2536 transitions. [2023-04-01 22:55:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:55:18,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 140 [2023-04-01 22:55:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:18,461 INFO L225 Difference]: With dead ends: 1682 [2023-04-01 22:55:18,461 INFO L226 Difference]: Without dead ends: 1122 [2023-04-01 22:55:18,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:55:18,462 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 142 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:18,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 323 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 22:55:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2023-04-01 22:55:18,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 936. [2023-04-01 22:55:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 913 states have (on average 1.362541073384447) internal successors, (1244), 922 states have internal predecessors, (1244), 7 states have call successors, (7), 7 states have call predecessors, (7), 15 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-04-01 22:55:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1292 transitions. [2023-04-01 22:55:18,481 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1292 transitions. Word has length 140 [2023-04-01 22:55:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:18,481 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1292 transitions. [2023-04-01 22:55:18,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:55:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1292 transitions. [2023-04-01 22:55:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-04-01 22:55:18,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:18,489 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:18,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:18,694 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 [2023-04-01 22:55:18,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:18,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1207977489, now seen corresponding path program 1 times [2023-04-01 22:55:18,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:18,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851726114] [2023-04-01 22:55:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:18,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:18,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:18,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:19,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 22:55:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:55:19,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:19,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851726114] [2023-04-01 22:55:19,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851726114] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:19,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901906270] [2023-04-01 22:55:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:19,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:19,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:19,082 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) [2023-04-01 22:55:19,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:55:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:19,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:55:19,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:55:19,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:55:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:55:19,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901906270] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:55:19,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:55:19,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:55:19,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569620493] [2023-04-01 22:55:19,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:55:19,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:55:19,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:19,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:55:19,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:55:19,580 INFO L87 Difference]: Start difference. First operand 936 states and 1292 transitions. Second operand has 12 states, 12 states have (on average 31.583333333333332) internal successors, (379), 10 states have internal predecessors, (379), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:55:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:21,766 INFO L93 Difference]: Finished difference Result 3212 states and 4627 transitions. [2023-04-01 22:55:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 22:55:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 31.583333333333332) internal successors, (379), 10 states have internal predecessors, (379), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 214 [2023-04-01 22:55:21,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:21,777 INFO L225 Difference]: With dead ends: 3212 [2023-04-01 22:55:21,777 INFO L226 Difference]: Without dead ends: 2098 [2023-04-01 22:55:21,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 433 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2023-04-01 22:55:21,781 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1527 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 3512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:21,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1527 Valid, 125 Invalid, 3512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 2840 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 22:55:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2023-04-01 22:55:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1502. [2023-04-01 22:55:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1463 states have (on average 1.2453861927546137) internal successors, (1822), 1482 states have internal predecessors, (1822), 10 states have call successors, (10), 10 states have call predecessors, (10), 28 states have return successors, (79), 9 states have call predecessors, (79), 9 states have call successors, (79) [2023-04-01 22:55:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 1911 transitions. [2023-04-01 22:55:21,817 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 1911 transitions. Word has length 214 [2023-04-01 22:55:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:21,818 INFO L495 AbstractCegarLoop]: Abstraction has 1502 states and 1911 transitions. [2023-04-01 22:55:21,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 31.583333333333332) internal successors, (379), 10 states have internal predecessors, (379), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:55:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 1911 transitions. [2023-04-01 22:55:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-04-01 22:55:21,830 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:21,831 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:55:21,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:22,036 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 [2023-04-01 22:55:22,036 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:22,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash 453301414, now seen corresponding path program 1 times [2023-04-01 22:55:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:22,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232767975] [2023-04-01 22:55:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:22,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:22,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:22,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:22,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-04-01 22:55:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 22:55:22,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:22,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232767975] [2023-04-01 22:55:22,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232767975] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173820931] [2023-04-01 22:55:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:22,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:22,287 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) [2023-04-01 22:55:22,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:55:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:22,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:55:22,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 22:55:22,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:55:22,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173820931] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:55:22,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:55:22,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:55:22,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734273183] [2023-04-01 22:55:22,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:55:22,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:55:22,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:22,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:55:22,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:55:22,461 INFO L87 Difference]: Start difference. First operand 1502 states and 1911 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:55:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:22,962 INFO L93 Difference]: Finished difference Result 3916 states and 5081 transitions. [2023-04-01 22:55:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:55:22,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 243 [2023-04-01 22:55:22,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:22,986 INFO L225 Difference]: With dead ends: 3916 [2023-04-01 22:55:22,986 INFO L226 Difference]: Without dead ends: 2420 [2023-04-01 22:55:22,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:55:22,989 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 142 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:22,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 325 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 22:55:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2023-04-01 22:55:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2054. [2023-04-01 22:55:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2006 states have (on average 1.2253240279162512) internal successors, (2458), 2028 states have internal predecessors, (2458), 13 states have call successors, (13), 13 states have call predecessors, (13), 34 states have return successors, (120), 12 states have call predecessors, (120), 12 states have call successors, (120) [2023-04-01 22:55:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2591 transitions. [2023-04-01 22:55:23,043 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2591 transitions. Word has length 243 [2023-04-01 22:55:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:23,043 INFO L495 AbstractCegarLoop]: Abstraction has 2054 states and 2591 transitions. [2023-04-01 22:55:23,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:55:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2591 transitions. [2023-04-01 22:55:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-04-01 22:55:23,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:23,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:23,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:23,251 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 [2023-04-01 22:55:23,251 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:23,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -506716361, now seen corresponding path program 1 times [2023-04-01 22:55:23,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:23,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209806958] [2023-04-01 22:55:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:23,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:23,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:23,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-04-01 22:55:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 174 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:55:24,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:24,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209806958] [2023-04-01 22:55:24,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209806958] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:24,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617839521] [2023-04-01 22:55:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:24,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:24,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:24,019 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) [2023-04-01 22:55:24,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:55:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:24,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:55:24,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-01 22:55:24,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:55:24,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617839521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:55:24,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:55:24,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 22:55:24,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162833818] [2023-04-01 22:55:24,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:55:24,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:55:24,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:55:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:55:24,458 INFO L87 Difference]: Start difference. First operand 2054 states and 2591 transitions. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:55:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:25,148 INFO L93 Difference]: Finished difference Result 3748 states and 4774 transitions. [2023-04-01 22:55:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:55:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 262 [2023-04-01 22:55:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:25,153 INFO L225 Difference]: With dead ends: 3748 [2023-04-01 22:55:25,153 INFO L226 Difference]: Without dead ends: 2066 [2023-04-01 22:55:25,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:55:25,156 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 340 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:25,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 54 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 22:55:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2023-04-01 22:55:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2060. [2023-04-01 22:55:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2009 states have (on average 1.2200099552015928) internal successors, (2451), 2034 states have internal predecessors, (2451), 13 states have call successors, (13), 13 states have call predecessors, (13), 37 states have return successors, (119), 12 states have call predecessors, (119), 12 states have call successors, (119) [2023-04-01 22:55:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2583 transitions. [2023-04-01 22:55:25,184 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2583 transitions. Word has length 262 [2023-04-01 22:55:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:25,185 INFO L495 AbstractCegarLoop]: Abstraction has 2060 states and 2583 transitions. [2023-04-01 22:55:25,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:55:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2583 transitions. [2023-04-01 22:55:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2023-04-01 22:55:25,188 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:25,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:55:25,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:25,409 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 [2023-04-01 22:55:25,409 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:25,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1615514058, now seen corresponding path program 1 times [2023-04-01 22:55:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:25,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718494311] [2023-04-01 22:55:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:25,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:25,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:25,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:25,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-04-01 22:55:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:26,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2023-04-01 22:55:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 188 proven. 104 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-01 22:55:26,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:26,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718494311] [2023-04-01 22:55:26,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718494311] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:26,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031985195] [2023-04-01 22:55:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:26,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:26,175 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) [2023-04-01 22:55:26,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:55:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:26,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:55:26,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-04-01 22:55:26,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:55:26,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031985195] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:55:26,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:55:26,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-04-01 22:55:26,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846191786] [2023-04-01 22:55:26,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:55:26,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:55:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:55:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:55:26,616 INFO L87 Difference]: Start difference. First operand 2060 states and 2583 transitions. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:55:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:27,424 INFO L93 Difference]: Finished difference Result 3954 states and 4992 transitions. [2023-04-01 22:55:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 22:55:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 335 [2023-04-01 22:55:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:27,446 INFO L225 Difference]: With dead ends: 3954 [2023-04-01 22:55:27,447 INFO L226 Difference]: Without dead ends: 2266 [2023-04-01 22:55:27,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-01 22:55:27,450 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 423 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:27,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 54 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 22:55:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2023-04-01 22:55:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1878. [2023-04-01 22:55:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1829 states have (on average 1.2290869327501366) internal successors, (2248), 1854 states have internal predecessors, (2248), 12 states have call successors, (12), 12 states have call predecessors, (12), 36 states have return successors, (105), 11 states have call predecessors, (105), 11 states have call successors, (105) [2023-04-01 22:55:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 2365 transitions. [2023-04-01 22:55:27,536 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 2365 transitions. Word has length 335 [2023-04-01 22:55:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:27,537 INFO L495 AbstractCegarLoop]: Abstraction has 1878 states and 2365 transitions. [2023-04-01 22:55:27,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:55:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 2365 transitions. [2023-04-01 22:55:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-04-01 22:55:27,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:27,540 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:55:27,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:27,761 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 [2023-04-01 22:55:27,762 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:27,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:27,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1785930787, now seen corresponding path program 1 times [2023-04-01 22:55:27,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:27,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105068131] [2023-04-01 22:55:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:27,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:28,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:28,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:28,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-04-01 22:55:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:28,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-04-01 22:55:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 148 proven. 232 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:55:28,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:28,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105068131] [2023-04-01 22:55:28,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105068131] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:28,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947432842] [2023-04-01 22:55:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:28,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:28,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:28,443 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) [2023-04-01 22:55:28,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:55:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:28,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 22:55:28,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 346 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-01 22:55:29,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:55:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 119 proven. 264 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:55:31,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947432842] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:55:31,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:55:31,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-04-01 22:55:31,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184001470] [2023-04-01 22:55:31,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:55:31,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 22:55:31,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:31,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 22:55:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-04-01 22:55:31,846 INFO L87 Difference]: Start difference. First operand 1878 states and 2365 transitions. Second operand has 22 states, 22 states have (on average 35.68181818181818) internal successors, (785), 21 states have internal predecessors, (785), 7 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:55:35,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:35,501 INFO L93 Difference]: Finished difference Result 5541 states and 7302 transitions. [2023-04-01 22:55:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-01 22:55:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 35.68181818181818) internal successors, (785), 21 states have internal predecessors, (785), 7 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 346 [2023-04-01 22:55:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:35,517 INFO L225 Difference]: With dead ends: 5541 [2023-04-01 22:55:35,518 INFO L226 Difference]: Without dead ends: 3598 [2023-04-01 22:55:35,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 715 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=779, Invalid=2527, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 22:55:35,524 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4108 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 3497 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4114 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 4552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 3497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:35,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4114 Valid, 142 Invalid, 4552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 3497 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 22:55:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2023-04-01 22:55:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3344. [2023-04-01 22:55:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3274 states have (on average 1.0705558949297496) internal successors, (3505), 3304 states have internal predecessors, (3505), 20 states have call successors, (20), 20 states have call predecessors, (20), 49 states have return successors, (167), 19 states have call predecessors, (167), 19 states have call successors, (167) [2023-04-01 22:55:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 3692 transitions. [2023-04-01 22:55:35,647 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 3692 transitions. Word has length 346 [2023-04-01 22:55:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:35,647 INFO L495 AbstractCegarLoop]: Abstraction has 3344 states and 3692 transitions. [2023-04-01 22:55:35,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.68181818181818) internal successors, (785), 21 states have internal predecessors, (785), 7 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:55:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 3692 transitions. [2023-04-01 22:55:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2023-04-01 22:55:35,655 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:35,655 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:35,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:35,860 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 [2023-04-01 22:55:35,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:35,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:35,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1269506602, now seen corresponding path program 1 times [2023-04-01 22:55:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:35,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680325777] [2023-04-01 22:55:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:35,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:36,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:36,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 22:55:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:36,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2023-04-01 22:55:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:36,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 305 [2023-04-01 22:55:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 233 proven. 148 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-04-01 22:55:36,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:36,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680325777] [2023-04-01 22:55:36,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680325777] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:36,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548572320] [2023-04-01 22:55:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:36,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:36,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:36,171 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) [2023-04-01 22:55:36,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:55:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:36,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:55:36,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 514 proven. 2 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-04-01 22:55:36,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:55:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 234 proven. 150 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-04-01 22:55:36,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548572320] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:55:36,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:55:36,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:55:36,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952205081] [2023-04-01 22:55:36,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:55:36,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:55:36,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:36,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:55:36,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:55:36,593 INFO L87 Difference]: Start difference. First operand 3344 states and 3692 transitions. Second operand has 12 states, 12 states have (on average 37.916666666666664) internal successors, (455), 10 states have internal predecessors, (455), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 22:55:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:38,118 INFO L93 Difference]: Finished difference Result 7620 states and 8618 transitions. [2023-04-01 22:55:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 22:55:38,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 37.916666666666664) internal successors, (455), 10 states have internal predecessors, (455), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 447 [2023-04-01 22:55:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:38,146 INFO L225 Difference]: With dead ends: 7620 [2023-04-01 22:55:38,146 INFO L226 Difference]: Without dead ends: 4648 [2023-04-01 22:55:38,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 911 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:55:38,151 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 907 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:38,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 95 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2087 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 22:55:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2023-04-01 22:55:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 4464. [2023-04-01 22:55:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4464 states, 4368 states have (on average 1.0682234432234432) internal successors, (4666), 4412 states have internal predecessors, (4666), 26 states have call successors, (26), 26 states have call predecessors, (26), 69 states have return successors, (270), 25 states have call predecessors, (270), 25 states have call successors, (270) [2023-04-01 22:55:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 4962 transitions. [2023-04-01 22:55:38,244 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 4962 transitions. Word has length 447 [2023-04-01 22:55:38,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:38,244 INFO L495 AbstractCegarLoop]: Abstraction has 4464 states and 4962 transitions. [2023-04-01 22:55:38,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.916666666666664) internal successors, (455), 10 states have internal predecessors, (455), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 22:55:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 4962 transitions. [2023-04-01 22:55:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2023-04-01 22:55:38,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:38,252 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:38,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:38,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:38,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:38,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:38,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2093387578, now seen corresponding path program 1 times [2023-04-01 22:55:38,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:38,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99787297] [2023-04-01 22:55:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:38,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:39,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:39,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:39,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 22:55:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:39,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-04-01 22:55:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:39,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-04-01 22:55:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:39,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 501 [2023-04-01 22:55:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1269 backedges. 349 proven. 535 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-04-01 22:55:39,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99787297] [2023-04-01 22:55:39,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99787297] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512351533] [2023-04-01 22:55:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:39,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:39,513 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) [2023-04-01 22:55:39,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:55:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:39,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 22:55:39,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1269 backedges. 906 proven. 2 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2023-04-01 22:55:39,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:55:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1269 backedges. 537 proven. 105 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2023-04-01 22:55:40,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512351533] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:55:40,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:55:40,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 12 [2023-04-01 22:55:40,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85859348] [2023-04-01 22:55:40,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:55:40,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:55:40,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:55:40,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:55:40,519 INFO L87 Difference]: Start difference. First operand 4464 states and 4962 transitions. Second operand has 12 states, 12 states have (on average 50.75) internal successors, (609), 10 states have internal predecessors, (609), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 22:55:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:41,928 INFO L93 Difference]: Finished difference Result 9686 states and 10820 transitions. [2023-04-01 22:55:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 22:55:41,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 50.75) internal successors, (609), 10 states have internal predecessors, (609), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 643 [2023-04-01 22:55:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:41,940 INFO L225 Difference]: With dead ends: 9686 [2023-04-01 22:55:41,940 INFO L226 Difference]: Without dead ends: 5226 [2023-04-01 22:55:41,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1335 GetRequests, 1309 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2023-04-01 22:55:41,946 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2139 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:41,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2139 Valid, 54 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 22:55:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2023-04-01 22:55:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4650. [2023-04-01 22:55:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4550 states have (on average 1.06) internal successors, (4823), 4596 states have internal predecessors, (4823), 27 states have call successors, (27), 27 states have call predecessors, (27), 72 states have return successors, (255), 26 states have call predecessors, (255), 26 states have call successors, (255) [2023-04-01 22:55:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 5105 transitions. [2023-04-01 22:55:42,023 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 5105 transitions. Word has length 643 [2023-04-01 22:55:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:42,023 INFO L495 AbstractCegarLoop]: Abstraction has 4650 states and 5105 transitions. [2023-04-01 22:55:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 50.75) internal successors, (609), 10 states have internal predecessors, (609), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 22:55:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 5105 transitions. [2023-04-01 22:55:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2023-04-01 22:55:42,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:42,030 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:42,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:42,236 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,SelfDestructingSolverStorable9 [2023-04-01 22:55:42,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:42,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:42,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1261032057, now seen corresponding path program 1 times [2023-04-01 22:55:42,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:42,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485249128] [2023-04-01 22:55:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:42,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:42,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:42,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:42,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 22:55:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:43,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-04-01 22:55:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-04-01 22:55:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:43,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2023-04-01 22:55:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:43,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2023-04-01 22:55:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 645 proven. 116 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2023-04-01 22:55:43,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:43,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485249128] [2023-04-01 22:55:43,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485249128] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:43,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803632386] [2023-04-01 22:55:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:43,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:43,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:43,393 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) [2023-04-01 22:55:43,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 22:55:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:43,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 22:55:43,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 1093 proven. 2 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2023-04-01 22:55:43,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:55:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 655 proven. 105 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2023-04-01 22:55:45,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803632386] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:55:45,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:55:45,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2023-04-01 22:55:45,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965115267] [2023-04-01 22:55:45,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:55:45,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 22:55:45,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 22:55:45,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:55:45,438 INFO L87 Difference]: Start difference. First operand 4650 states and 5105 transitions. Second operand has 16 states, 16 states have (on average 38.5625) internal successors, (617), 14 states have internal predecessors, (617), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 22:55:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:48,280 INFO L93 Difference]: Finished difference Result 8883 states and 9846 transitions. [2023-04-01 22:55:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-04-01 22:55:48,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 38.5625) internal successors, (617), 14 states have internal predecessors, (617), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 716 [2023-04-01 22:55:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:48,297 INFO L225 Difference]: With dead ends: 8883 [2023-04-01 22:55:48,297 INFO L226 Difference]: Without dead ends: 4357 [2023-04-01 22:55:48,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1515 GetRequests, 1461 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=685, Invalid=2285, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 22:55:48,303 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3337 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 2629 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3341 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 2629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:48,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3341 Valid, 122 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 2629 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 22:55:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2023-04-01 22:55:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 3910. [2023-04-01 22:55:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3824 states have (on average 1.0525627615062763) internal successors, (4025), 3864 states have internal predecessors, (4025), 23 states have call successors, (23), 23 states have call predecessors, (23), 62 states have return successors, (211), 22 states have call predecessors, (211), 22 states have call successors, (211) [2023-04-01 22:55:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 4259 transitions. [2023-04-01 22:55:48,388 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 4259 transitions. Word has length 716 [2023-04-01 22:55:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:48,389 INFO L495 AbstractCegarLoop]: Abstraction has 3910 states and 4259 transitions. [2023-04-01 22:55:48,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 38.5625) internal successors, (617), 14 states have internal predecessors, (617), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 22:55:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 4259 transitions. [2023-04-01 22:55:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2023-04-01 22:55:48,396 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:48,396 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:48,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:48,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:48,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:48,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:48,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1409957773, now seen corresponding path program 1 times [2023-04-01 22:55:48,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:48,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027089179] [2023-04-01 22:55:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:48,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:49,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:49,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:49,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 22:55:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:49,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-04-01 22:55:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:49,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2023-04-01 22:55:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:49,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2023-04-01 22:55:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:49,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-04-01 22:55:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 768 proven. 13 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2023-04-01 22:55:50,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027089179] [2023-04-01 22:55:50,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027089179] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380856986] [2023-04-01 22:55:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:50,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:50,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:50,107 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) [2023-04-01 22:55:50,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 22:55:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:50,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:55:50,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 1206 proven. 2 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-04-01 22:55:50,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:55:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 484 proven. 150 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2023-04-01 22:55:50,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380856986] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:55:50,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:55:50,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 18 [2023-04-01 22:55:50,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615503294] [2023-04-01 22:55:50,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:55:50,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 22:55:50,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:50,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 22:55:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-01 22:55:50,658 INFO L87 Difference]: Start difference. First operand 3910 states and 4259 transitions. Second operand has 18 states, 18 states have (on average 36.611111111111114) internal successors, (659), 16 states have internal predecessors, (659), 5 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 22:55:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:53,699 INFO L93 Difference]: Finished difference Result 7994 states and 8758 transitions. [2023-04-01 22:55:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 22:55:53,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 36.611111111111114) internal successors, (659), 16 states have internal predecessors, (659), 5 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 770 [2023-04-01 22:55:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:53,710 INFO L225 Difference]: With dead ends: 7994 [2023-04-01 22:55:53,710 INFO L226 Difference]: Without dead ends: 4456 [2023-04-01 22:55:53,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1643 GetRequests, 1580 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=748, Invalid=3158, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 22:55:53,716 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3000 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 3838 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3000 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 4151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 3838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:53,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3000 Valid, 141 Invalid, 4151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 3838 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 22:55:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2023-04-01 22:55:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 4450. [2023-04-01 22:55:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4450 states, 4361 states have (on average 1.0415042421462968) internal successors, (4542), 4398 states have internal predecessors, (4542), 26 states have call successors, (26), 26 states have call predecessors, (26), 62 states have return successors, (190), 25 states have call predecessors, (190), 25 states have call successors, (190) [2023-04-01 22:55:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4450 states to 4450 states and 4758 transitions. [2023-04-01 22:55:53,815 INFO L78 Accepts]: Start accepts. Automaton has 4450 states and 4758 transitions. Word has length 770 [2023-04-01 22:55:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:53,815 INFO L495 AbstractCegarLoop]: Abstraction has 4450 states and 4758 transitions. [2023-04-01 22:55:53,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 36.611111111111114) internal successors, (659), 16 states have internal predecessors, (659), 5 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 22:55:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4450 states and 4758 transitions. [2023-04-01 22:55:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2023-04-01 22:55:53,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:53,824 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:53,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:54,030 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,SelfDestructingSolverStorable11 [2023-04-01 22:55:54,031 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:54,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:54,031 INFO L85 PathProgramCache]: Analyzing trace with hash -142421082, now seen corresponding path program 1 times [2023-04-01 22:55:54,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:54,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005282877] [2023-04-01 22:55:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:54,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:54,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:54,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:54,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 22:55:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:54,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-04-01 22:55:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:54,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2023-04-01 22:55:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:54,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2023-04-01 22:55:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:54,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2023-04-01 22:55:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:54,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 769 [2023-04-01 22:55:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2564 backedges. 274 proven. 28 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2023-04-01 22:55:54,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:54,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005282877] [2023-04-01 22:55:54,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005282877] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:54,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762154772] [2023-04-01 22:55:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:54,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:54,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:54,888 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) [2023-04-01 22:55:54,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 22:55:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:55,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:55:55,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2564 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 2280 trivial. 0 not checked. [2023-04-01 22:55:55,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:55:55,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762154772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:55:55,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:55:55,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2023-04-01 22:55:55,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545552662] [2023-04-01 22:55:55,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:55:55,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:55:55,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:55,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:55:55,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:55:55,158 INFO L87 Difference]: Start difference. First operand 4450 states and 4758 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:55:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:55,500 INFO L93 Difference]: Finished difference Result 8528 states and 9142 transitions. [2023-04-01 22:55:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:55:55,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 981 [2023-04-01 22:55:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:55,508 INFO L225 Difference]: With dead ends: 8528 [2023-04-01 22:55:55,509 INFO L226 Difference]: Without dead ends: 4450 [2023-04-01 22:55:55,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:55:55,514 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 144 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:55,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 222 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 22:55:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2023-04-01 22:55:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 4268. [2023-04-01 22:55:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4268 states, 4181 states have (on average 1.0361157617794785) internal successors, (4332), 4218 states have internal predecessors, (4332), 25 states have call successors, (25), 25 states have call predecessors, (25), 61 states have return successors, (163), 24 states have call predecessors, (163), 24 states have call successors, (163) [2023-04-01 22:55:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4268 states to 4268 states and 4520 transitions. [2023-04-01 22:55:55,578 INFO L78 Accepts]: Start accepts. Automaton has 4268 states and 4520 transitions. Word has length 981 [2023-04-01 22:55:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:55,579 INFO L495 AbstractCegarLoop]: Abstraction has 4268 states and 4520 transitions. [2023-04-01 22:55:55,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:55:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4268 states and 4520 transitions. [2023-04-01 22:55:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2023-04-01 22:55:55,587 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:55,588 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:55:55,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:55,794 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,SelfDestructingSolverStorable12 [2023-04-01 22:55:55,794 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:55,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:55,795 INFO L85 PathProgramCache]: Analyzing trace with hash 697535935, now seen corresponding path program 1 times [2023-04-01 22:55:55,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:55,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039747782] [2023-04-01 22:55:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:55,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:55:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:55:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 22:55:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-04-01 22:55:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2023-04-01 22:55:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2023-04-01 22:55:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2023-04-01 22:55:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 769 [2023-04-01 22:55:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 848 [2023-04-01 22:55:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2998 backedges. 562 proven. 467 refuted. 0 times theorem prover too weak. 1969 trivial. 0 not checked. [2023-04-01 22:55:56,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:55:56,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039747782] [2023-04-01 22:55:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039747782] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:55:56,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821090741] [2023-04-01 22:55:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:56,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:55:56,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:55:56,532 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) [2023-04-01 22:55:56,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 22:55:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:55:56,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:55:56,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:55:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2998 backedges. 2027 proven. 2 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2023-04-01 22:55:56,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:55:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2998 backedges. 685 proven. 431 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2023-04-01 22:55:58,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821090741] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:55:58,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:55:58,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:55:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675528556] [2023-04-01 22:55:58,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:55:58,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:55:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:55:58,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:55:58,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:55:58,180 INFO L87 Difference]: Start difference. First operand 4268 states and 4520 transitions. Second operand has 11 states, 11 states have (on average 75.27272727272727) internal successors, (828), 9 states have internal predecessors, (828), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 22:55:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:55:59,117 INFO L93 Difference]: Finished difference Result 9686 states and 10364 transitions. [2023-04-01 22:55:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 22:55:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 75.27272727272727) internal successors, (828), 9 states have internal predecessors, (828), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 990 [2023-04-01 22:55:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:55:59,126 INFO L225 Difference]: With dead ends: 9686 [2023-04-01 22:55:59,126 INFO L226 Difference]: Without dead ends: 5790 [2023-04-01 22:55:59,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2026 GetRequests, 2002 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2023-04-01 22:55:59,130 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1895 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:55:59,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 78 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 22:55:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2023-04-01 22:55:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 5746. [2023-04-01 22:55:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5746 states, 5632 states have (on average 1.0305397727272727) internal successors, (5804), 5680 states have internal predecessors, (5804), 33 states have call successors, (33), 33 states have call predecessors, (33), 80 states have return successors, (196), 32 states have call predecessors, (196), 32 states have call successors, (196) [2023-04-01 22:55:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5746 states to 5746 states and 6033 transitions. [2023-04-01 22:55:59,223 INFO L78 Accepts]: Start accepts. Automaton has 5746 states and 6033 transitions. Word has length 990 [2023-04-01 22:55:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:55:59,223 INFO L495 AbstractCegarLoop]: Abstraction has 5746 states and 6033 transitions. [2023-04-01 22:55:59,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.27272727272727) internal successors, (828), 9 states have internal predecessors, (828), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 22:55:59,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5746 states and 6033 transitions. [2023-04-01 22:55:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2023-04-01 22:55:59,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:55:59,234 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:55:59,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 22:55:59,440 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,SelfDestructingSolverStorable13 [2023-04-01 22:55:59,440 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:55:59,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:55:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1664029330, now seen corresponding path program 1 times [2023-04-01 22:55:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:55:59,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336680144] [2023-04-01 22:55:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:55:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:55:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:00,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:56:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:00,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:56:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:00,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 22:56:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:00,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-04-01 22:56:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:00,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2023-04-01 22:56:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:01,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 521 [2023-04-01 22:56:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:01,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 597 [2023-04-01 22:56:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:01,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 776 [2023-04-01 22:56:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:01,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 855 [2023-04-01 22:56:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3012 backedges. 1048 proven. 541 refuted. 0 times theorem prover too weak. 1423 trivial. 0 not checked. [2023-04-01 22:56:01,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:56:01,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336680144] [2023-04-01 22:56:01,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336680144] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:56:01,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813441515] [2023-04-01 22:56:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:56:01,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:56:01,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:56:01,322 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) [2023-04-01 22:56:01,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 22:56:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:01,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:56:01,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:56:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3012 backedges. 1938 proven. 6 refuted. 0 times theorem prover too weak. 1068 trivial. 0 not checked. [2023-04-01 22:56:01,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:56:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3012 backedges. 1321 proven. 257 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2023-04-01 22:56:02,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813441515] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:56:02,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:56:02,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 8] total 26 [2023-04-01 22:56:02,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477040189] [2023-04-01 22:56:02,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:56:02,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 22:56:02,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:56:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 22:56:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:56:02,670 INFO L87 Difference]: Start difference. First operand 5746 states and 6033 transitions. Second operand has 26 states, 26 states have (on average 38.34615384615385) internal successors, (997), 24 states have internal predecessors, (997), 10 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2023-04-01 22:56:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:56:07,616 INFO L93 Difference]: Finished difference Result 12078 states and 12735 transitions. [2023-04-01 22:56:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-04-01 22:56:07,617 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 38.34615384615385) internal successors, (997), 24 states have internal predecessors, (997), 10 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) Word has length 997 [2023-04-01 22:56:07,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:56:07,629 INFO L225 Difference]: With dead ends: 12078 [2023-04-01 22:56:07,629 INFO L226 Difference]: Without dead ends: 6704 [2023-04-01 22:56:07,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2147 GetRequests, 2044 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3577 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1603, Invalid=9317, Unknown=0, NotChecked=0, Total=10920 [2023-04-01 22:56:07,639 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6330 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 6096 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6330 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 6645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 6096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:56:07,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6330 Valid, 348 Invalid, 6645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 6096 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 22:56:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2023-04-01 22:56:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 6302. [2023-04-01 22:56:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6302 states, 6177 states have (on average 1.0275214505423345) internal successors, (6347), 6230 states have internal predecessors, (6347), 36 states have call successors, (36), 36 states have call predecessors, (36), 88 states have return successors, (197), 35 states have call predecessors, (197), 35 states have call successors, (197) [2023-04-01 22:56:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6302 states to 6302 states and 6580 transitions. [2023-04-01 22:56:07,795 INFO L78 Accepts]: Start accepts. Automaton has 6302 states and 6580 transitions. Word has length 997 [2023-04-01 22:56:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:56:07,795 INFO L495 AbstractCegarLoop]: Abstraction has 6302 states and 6580 transitions. [2023-04-01 22:56:07,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 38.34615384615385) internal successors, (997), 24 states have internal predecessors, (997), 10 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2023-04-01 22:56:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6302 states and 6580 transitions. [2023-04-01 22:56:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1709 [2023-04-01 22:56:07,815 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:56:07,815 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:56:07,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 22:56:08,022 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,SelfDestructingSolverStorable14 [2023-04-01 22:56:08,022 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:56:08,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:56:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 84919971, now seen corresponding path program 1 times [2023-04-01 22:56:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:56:08,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374453301] [2023-04-01 22:56:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:56:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:56:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:56:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:56:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 22:56:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-04-01 22:56:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2023-04-01 22:56:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2023-04-01 22:56:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2023-04-01 22:56:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2023-04-01 22:56:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 857 [2023-04-01 22:56:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 975 [2023-04-01 22:56:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1115 [2023-04-01 22:56:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1297 [2023-04-01 22:56:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1410 [2023-04-01 22:56:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:12,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1537 [2023-04-01 22:56:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 4488 proven. 79 refuted. 0 times theorem prover too weak. 4365 trivial. 0 not checked. [2023-04-01 22:56:12,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:56:12,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374453301] [2023-04-01 22:56:12,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374453301] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:56:12,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973477623] [2023-04-01 22:56:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:56:12,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:56:12,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:56:12,135 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) [2023-04-01 22:56:12,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 22:56:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:56:12,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 2312 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:56:12,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:56:14,879 WARN L861 $PredicateComparison]: unable to prove that (or (exists ((v_~a12~0_638 Int)) (and (<= 0 v_~a12~0_638) (<= (+ 17688 (div (* 9 v_~a12~0_638) 10)) c_~a12~0) (<= |c_old(~a12~0)| v_~a12~0_638))) (exists ((v_z_2 Int) (v_y_2 Int)) (let ((.cse0 (+ (* v_y_2 10) (* 9 v_z_2)))) (and (< .cse0 0) (not (= v_z_2 0)) (<= (+ 17689 (* 9 v_y_2) (div (* 81 v_z_2) 10)) c_~a12~0) (<= 0 v_z_2) (<= |c_old(~a12~0)| .cse0) (< v_z_2 10)))) (<= (+ (* (div (+ (- 1) |c_old(~a12~0)|) 10) 9) 17697) c_~a12~0)) is different from true [2023-04-01 22:56:16,917 WARN L861 $PredicateComparison]: unable to prove that (or (exists ((v_z_2 Int) (v_y_2 Int)) (let ((.cse0 (+ (* v_y_2 10) (* 9 v_z_2)))) (and (< .cse0 0) (<= (+ 17689 (* 9 v_y_2) (div (* 81 v_z_2) 10)) c_~a12~0) (<= 0 v_z_2) (<= |c_old(~a12~0)| .cse0) (< v_z_2 10)))) (exists ((v_~a12~0_638 Int)) (and (<= 0 v_~a12~0_638) (<= (+ 17688 (div (* 9 v_~a12~0_638) 10)) c_~a12~0) (<= |c_old(~a12~0)| v_~a12~0_638))) (<= (+ (* (div (+ (- 1) |c_old(~a12~0)|) 10) 9) 17697) c_~a12~0)) is different from true [2023-04-01 22:56:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 2946 proven. 72 refuted. 0 times theorem prover too weak. 5910 trivial. 4 not checked. [2023-04-01 22:56:17,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:56:17,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973477623] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:56:17,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:56:17,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2023-04-01 22:56:17,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198260852] [2023-04-01 22:56:17,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 22:56:17,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 22:56:17,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:56:17,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 22:56:17,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=333, Unknown=2, NotChecked=78, Total=506 [2023-04-01 22:56:17,199 INFO L87 Difference]: Start difference. First operand 6302 states and 6580 transitions. Second operand has 21 states, 20 states have (on average 30.9) internal successors, (618), 19 states have internal predecessors, (618), 9 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 22:56:42,495 WARN L223 SmtUtils]: Spent 22.13s on a formula simplification. DAG size of input: 60 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 22:57:07,167 WARN L223 SmtUtils]: Spent 22.63s on a formula simplification. DAG size of input: 58 DAG size of output: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 22:57:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:57:08,210 INFO L93 Difference]: Finished difference Result 15215 states and 16010 transitions. [2023-04-01 22:57:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 22:57:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 30.9) internal successors, (618), 19 states have internal predecessors, (618), 9 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 1708 [2023-04-01 22:57:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:57:08,225 INFO L225 Difference]: With dead ends: 15215 [2023-04-01 22:57:08,225 INFO L226 Difference]: Without dead ends: 8142 [2023-04-01 22:57:08,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1853 GetRequests, 1804 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=526, Invalid=1641, Unknown=3, NotChecked=182, Total=2352 [2023-04-01 22:57:08,234 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2072 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 5582 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2072 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 9126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 5582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3359 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:57:08,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2072 Valid, 183 Invalid, 9126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 5582 Invalid, 0 Unknown, 3359 Unchecked, 3.2s Time] [2023-04-01 22:57:08,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8142 states. [2023-04-01 22:57:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8142 to 7032. [2023-04-01 22:57:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7032 states, 6898 states have (on average 1.0207306465642214) internal successors, (7041), 6952 states have internal predecessors, (7041), 40 states have call successors, (40), 40 states have call predecessors, (40), 93 states have return successors, (169), 39 states have call predecessors, (169), 39 states have call successors, (169) [2023-04-01 22:57:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7032 states to 7032 states and 7250 transitions. [2023-04-01 22:57:08,342 INFO L78 Accepts]: Start accepts. Automaton has 7032 states and 7250 transitions. Word has length 1708 [2023-04-01 22:57:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:57:08,343 INFO L495 AbstractCegarLoop]: Abstraction has 7032 states and 7250 transitions. [2023-04-01 22:57:08,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 30.9) internal successors, (618), 19 states have internal predecessors, (618), 9 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 22:57:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand 7032 states and 7250 transitions. [2023-04-01 22:57:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1792 [2023-04-01 22:57:08,364 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:57:08,364 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 10, 9, 9, 8, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:57:08,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-04-01 22:57:08,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:57:08,572 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:57:08,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:57:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash 410855022, now seen corresponding path program 1 times [2023-04-01 22:57:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:57:08,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236828571] [2023-04-01 22:57:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:57:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:57:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:57:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:57:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 22:57:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-04-01 22:57:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2023-04-01 22:57:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2023-04-01 22:57:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2023-04-01 22:57:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2023-04-01 22:57:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 857 [2023-04-01 22:57:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 975 [2023-04-01 22:57:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1115 [2023-04-01 22:57:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1297 [2023-04-01 22:57:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1410 [2023-04-01 22:57:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1537 [2023-04-01 22:57:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:11,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1649 [2023-04-01 22:57:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10167 backedges. 2987 proven. 515 refuted. 0 times theorem prover too weak. 6665 trivial. 0 not checked. [2023-04-01 22:57:12,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:57:12,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236828571] [2023-04-01 22:57:12,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236828571] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:57:12,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34621848] [2023-04-01 22:57:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:57:12,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:57:12,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:57:12,004 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) [2023-04-01 22:57:12,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 22:57:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:12,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 2432 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:57:12,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:57:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10167 backedges. 4333 proven. 6 refuted. 0 times theorem prover too weak. 5828 trivial. 0 not checked. [2023-04-01 22:57:12,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:57:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10167 backedges. 2998 proven. 320 refuted. 0 times theorem prover too weak. 6849 trivial. 0 not checked. [2023-04-01 22:57:14,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34621848] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:57:14,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:57:14,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 25 [2023-04-01 22:57:14,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165384537] [2023-04-01 22:57:14,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:57:14,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:57:14,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:57:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:57:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:57:14,813 INFO L87 Difference]: Start difference. First operand 7032 states and 7250 transitions. Second operand has 25 states, 25 states have (on average 41.36) internal successors, (1034), 23 states have internal predecessors, (1034), 11 states have call successors, (17), 9 states have call predecessors, (17), 13 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2023-04-01 22:57:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:57:23,078 INFO L93 Difference]: Finished difference Result 14626 states and 15085 transitions. [2023-04-01 22:57:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-04-01 22:57:23,079 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 41.36) internal successors, (1034), 23 states have internal predecessors, (1034), 11 states have call successors, (17), 9 states have call predecessors, (17), 13 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 1791 [2023-04-01 22:57:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:57:23,094 INFO L225 Difference]: With dead ends: 14626 [2023-04-01 22:57:23,095 INFO L226 Difference]: Without dead ends: 7596 [2023-04-01 22:57:23,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3752 GetRequests, 3653 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1645, Invalid=8255, Unknown=0, NotChecked=0, Total=9900 [2023-04-01 22:57:23,106 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 9592 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 16118 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9595 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 16591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 16118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:57:23,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9595 Valid, 467 Invalid, 16591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 16118 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 22:57:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7596 states. [2023-04-01 22:57:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7596 to 6662. [2023-04-01 22:57:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6662 states, 6535 states have (on average 1.0143840856924253) internal successors, (6629), 6586 states have internal predecessors, (6629), 38 states have call successors, (38), 38 states have call predecessors, (38), 88 states have return successors, (125), 37 states have call predecessors, (125), 37 states have call successors, (125) [2023-04-01 22:57:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6662 states to 6662 states and 6792 transitions. [2023-04-01 22:57:23,240 INFO L78 Accepts]: Start accepts. Automaton has 6662 states and 6792 transitions. Word has length 1791 [2023-04-01 22:57:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:57:23,241 INFO L495 AbstractCegarLoop]: Abstraction has 6662 states and 6792 transitions. [2023-04-01 22:57:23,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 41.36) internal successors, (1034), 23 states have internal predecessors, (1034), 11 states have call successors, (17), 9 states have call predecessors, (17), 13 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2023-04-01 22:57:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6662 states and 6792 transitions. [2023-04-01 22:57:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1884 [2023-04-01 22:57:23,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:57:23,265 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:57:23,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-01 22:57:23,472 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,SelfDestructingSolverStorable16 [2023-04-01 22:57:23,473 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:57:23,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:57:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1989700374, now seen corresponding path program 1 times [2023-04-01 22:57:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:57:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725707742] [2023-04-01 22:57:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:57:23,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:57:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:26,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:57:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:26,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:57:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:26,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 22:57:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:26,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-04-01 22:57:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:26,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2023-04-01 22:57:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2023-04-01 22:57:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2023-04-01 22:57:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2023-04-01 22:57:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 857 [2023-04-01 22:57:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 975 [2023-04-01 22:57:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1115 [2023-04-01 22:57:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1297 [2023-04-01 22:57:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1410 [2023-04-01 22:57:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1537 [2023-04-01 22:57:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1662 [2023-04-01 22:57:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1741 [2023-04-01 22:57:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11385 backedges. 2893 proven. 25 refuted. 0 times theorem prover too weak. 8467 trivial. 0 not checked. [2023-04-01 22:57:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:57:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725707742] [2023-04-01 22:57:27,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725707742] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:57:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463026399] [2023-04-01 22:57:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:57:27,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:57:27,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:57:27,466 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) [2023-04-01 22:57:27,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 22:57:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:57:27,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 22:57:27,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:57:59,835 WARN L223 SmtUtils]: Spent 29.78s on a formula simplification. DAG size of input: 206 DAG size of output: 152 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 22:58:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11385 backedges. 4872 proven. 528 refuted. 0 times theorem prover too weak. 5985 trivial. 0 not checked. [2023-04-01 22:58:00,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:58:11,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463026399] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:58:11,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:58:11,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-04-01 22:58:11,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989239613] [2023-04-01 22:58:11,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 22:58:11,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 22:58:11,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:58:11,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 22:58:11,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-04-01 22:58:11,025 INFO L87 Difference]: Start difference. First operand 6662 states and 6792 transitions. Second operand has 18 states, 18 states have (on average 35.166666666666664) internal successors, (633), 16 states have internal predecessors, (633), 8 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 22:58:24,949 WARN L223 SmtUtils]: Spent 10.93s on a formula simplification. DAG size of input: 162 DAG size of output: 125 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 22:58:26,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 22:58:34,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 22:58:37,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 22:58:52,312 WARN L223 SmtUtils]: Spent 13.27s on a formula simplification. DAG size of input: 170 DAG size of output: 130 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 22:59:07,923 WARN L223 SmtUtils]: Spent 14.28s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)