/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/Problem03_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:31:00,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:31:00,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:31:00,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:31:00,863 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 20:31:00,896 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:31:00,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:31:00,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:31:00,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:31:00,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:31:00,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:31:00,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:31:00,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:31:00,899 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:31:00,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:31:00,900 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:31:00,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:31:00,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:31:00,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:31:00,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:31:00,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:31:00,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:31:00,901 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:31:00,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:31:00,901 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:31:00,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:31:00,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:31:00,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:31:00,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:31:00,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:31:00,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:31:00,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:31:00,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:31:00,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:31:00,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:31:00,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:31:00,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:31:00,903 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:31:00,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:31:00,903 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:31:00,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:31:01,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:31:01,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:31:01,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:31:01,166 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:31:01,166 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:31:01,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2023-04-01 20:31:02,343 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:31:02,650 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:31:02,651 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2023-04-01 20:31:02,668 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f65262f4/39e1913e4a4046a0bdde067b9a70a6d7/FLAG0b11f9a27 [2023-04-01 20:31:02,683 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f65262f4/39e1913e4a4046a0bdde067b9a70a6d7 [2023-04-01 20:31:02,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:31:02,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:31:02,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:31:02,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:31:02,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:31:02,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:31:02" (1/1) ... [2023-04-01 20:31:02,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ebb7606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:02, skipping insertion in model container [2023-04-01 20:31:02,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:31:02" (1/1) ... [2023-04-01 20:31:02,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:31:02,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:31:03,220 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/Problem03_label45.c[53653,53666] [2023-04-01 20:31:03,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:31:03,268 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:31:03,464 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/Problem03_label45.c[53653,53666] [2023-04-01 20:31:03,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:31:03,500 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:31:03,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03 WrapperNode [2023-04-01 20:31:03,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:31:03,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:31:03,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:31:03,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:31:03,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (1/1) ... [2023-04-01 20:31:03,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (1/1) ... [2023-04-01 20:31:03,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (1/1) ... [2023-04-01 20:31:03,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (1/1) ... [2023-04-01 20:31:03,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (1/1) ... [2023-04-01 20:31:03,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (1/1) ... [2023-04-01 20:31:03,647 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (1/1) ... [2023-04-01 20:31:03,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (1/1) ... [2023-04-01 20:31:03,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:31:03,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:31:03,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:31:03,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:31:03,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (1/1) ... [2023-04-01 20:31:03,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:31:03,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:03,694 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 20:31:03,714 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 20:31:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:31:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:31:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:31:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:31:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:31:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:31:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:31:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:31:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:31:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:31:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:31:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:31:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:31:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:31:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:31:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:31:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:31:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:31:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:31:03,832 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:31:03,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:31:05,332 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:31:05,341 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:31:05,341 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:31:05,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:31:05 BoogieIcfgContainer [2023-04-01 20:31:05,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:31:05,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:31:05,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:31:05,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:31:05,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:31:02" (1/3) ... [2023-04-01 20:31:05,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f5424d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:31:05, skipping insertion in model container [2023-04-01 20:31:05,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:31:03" (2/3) ... [2023-04-01 20:31:05,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f5424d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:31:05, skipping insertion in model container [2023-04-01 20:31:05,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:31:05" (3/3) ... [2023-04-01 20:31:05,351 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label45.c [2023-04-01 20:31:05,367 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:31:05,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:31:05,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:31:05,429 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;@167eae9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:31:05,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:31:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 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 20:31:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 20:31:05,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:05,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:05,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:05,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1409975730, now seen corresponding path program 1 times [2023-04-01 20:31:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:05,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240601802] [2023-04-01 20:31:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:06,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:06,748 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 20:31:06,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:06,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240601802] [2023-04-01 20:31:06,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240601802] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:06,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:31:06,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:31:06,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780403471] [2023-04-01 20:31:06,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:06,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:31:06,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:06,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:31:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:31:06,801 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 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 36.5) internal successors, (146), 3 states have internal predecessors, (146), 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 20:31:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:09,577 INFO L93 Difference]: Finished difference Result 1104 states and 1964 transitions. [2023-04-01 20:31:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:31:09,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 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 150 [2023-04-01 20:31:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:09,596 INFO L225 Difference]: With dead ends: 1104 [2023-04-01 20:31:09,596 INFO L226 Difference]: Without dead ends: 696 [2023-04-01 20:31:09,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:31:09,607 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1078 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:09,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 71 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 20:31:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2023-04-01 20:31:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 472. [2023-04-01 20:31:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 462 states have (on average 1.5389610389610389) internal successors, (711), 464 states have internal predecessors, (711), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:31:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 722 transitions. [2023-04-01 20:31:09,691 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 722 transitions. Word has length 150 [2023-04-01 20:31:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:09,692 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 722 transitions. [2023-04-01 20:31:09,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 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 20:31:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 722 transitions. [2023-04-01 20:31:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-04-01 20:31:09,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:09,696 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:09,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:31:09,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:09,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash 195649694, now seen corresponding path program 1 times [2023-04-01 20:31:09,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:09,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806758771] [2023-04-01 20:31:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:09,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:10,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:10,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:31:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:10,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806758771] [2023-04-01 20:31:10,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806758771] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:10,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:31:10,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:31:10,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685981497] [2023-04-01 20:31:10,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:10,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:31:10,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:10,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:31:10,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:31:10,334 INFO L87 Difference]: Start difference. First operand 472 states and 722 transitions. Second operand has 7 states, 6 states have (on average 25.5) internal successors, (153), 4 states have internal predecessors, (153), 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 20:31:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:12,373 INFO L93 Difference]: Finished difference Result 1421 states and 2204 transitions. [2023-04-01 20:31:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:31:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 25.5) internal successors, (153), 4 states have internal predecessors, (153), 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 159 [2023-04-01 20:31:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:12,379 INFO L225 Difference]: With dead ends: 1421 [2023-04-01 20:31:12,379 INFO L226 Difference]: Without dead ends: 955 [2023-04-01 20:31:12,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:31:12,382 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 841 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:12,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 137 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 20:31:12,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2023-04-01 20:31:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 932. [2023-04-01 20:31:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.4616228070175439) internal successors, (1333), 920 states have internal predecessors, (1333), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 20:31:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1364 transitions. [2023-04-01 20:31:12,424 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1364 transitions. Word has length 159 [2023-04-01 20:31:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:12,425 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1364 transitions. [2023-04-01 20:31:12,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 25.5) internal successors, (153), 4 states have internal predecessors, (153), 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 20:31:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1364 transitions. [2023-04-01 20:31:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 20:31:12,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:12,429 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:12,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:31:12,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:12,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:12,430 INFO L85 PathProgramCache]: Analyzing trace with hash -760347887, now seen corresponding path program 1 times [2023-04-01 20:31:12,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:12,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363352287] [2023-04-01 20:31:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:12,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:12,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:13,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:31:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:13,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363352287] [2023-04-01 20:31:13,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363352287] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:13,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:31:13,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:31:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466112240] [2023-04-01 20:31:13,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:31:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:31:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:31:13,048 INFO L87 Difference]: Start difference. First operand 932 states and 1364 transitions. Second operand has 7 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 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 20:31:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:14,895 INFO L93 Difference]: Finished difference Result 2823 states and 4255 transitions. [2023-04-01 20:31:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:31:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 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 162 [2023-04-01 20:31:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:14,909 INFO L225 Difference]: With dead ends: 2823 [2023-04-01 20:31:14,909 INFO L226 Difference]: Without dead ends: 1897 [2023-04-01 20:31:14,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:31:14,917 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 778 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:14,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 131 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 20:31:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2023-04-01 20:31:14,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1866. [2023-04-01 20:31:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1813 states have (on average 1.4324324324324325) internal successors, (2597), 1846 states have internal predecessors, (2597), 10 states have call successors, (10), 10 states have call predecessors, (10), 42 states have return successors, (116), 9 states have call predecessors, (116), 9 states have call successors, (116) [2023-04-01 20:31:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2723 transitions. [2023-04-01 20:31:15,005 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2723 transitions. Word has length 162 [2023-04-01 20:31:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:15,005 INFO L495 AbstractCegarLoop]: Abstraction has 1866 states and 2723 transitions. [2023-04-01 20:31:15,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 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 20:31:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2723 transitions. [2023-04-01 20:31:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 20:31:15,011 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:15,012 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:15,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:31:15,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:15,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:15,012 INFO L85 PathProgramCache]: Analyzing trace with hash 624606083, now seen corresponding path program 1 times [2023-04-01 20:31:15,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:15,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734448299] [2023-04-01 20:31:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:15,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:16,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:16,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:16,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:31:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:31:16,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734448299] [2023-04-01 20:31:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734448299] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727168768] [2023-04-01 20:31:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:16,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:16,285 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 20:31:16,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:31:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:16,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:31:16,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:31:16,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:31:16,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727168768] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:16,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:31:16,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:31:16,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991921097] [2023-04-01 20:31:16,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:16,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:31:16,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:31:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:31:16,758 INFO L87 Difference]: Start difference. First operand 1866 states and 2723 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:31:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:17,188 INFO L93 Difference]: Finished difference Result 5656 states and 8535 transitions. [2023-04-01 20:31:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:31:17,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 173 [2023-04-01 20:31:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:17,209 INFO L225 Difference]: With dead ends: 5656 [2023-04-01 20:31:17,210 INFO L226 Difference]: Without dead ends: 3796 [2023-04-01 20:31:17,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:31:17,216 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 1093 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:17,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 916 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:31:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2023-04-01 20:31:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 3758. [2023-04-01 20:31:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 3631 states have (on average 1.430184522170201) internal successors, (5193), 3722 states have internal predecessors, (5193), 18 states have call successors, (18), 18 states have call predecessors, (18), 108 states have return successors, (369), 17 states have call predecessors, (369), 17 states have call successors, (369) [2023-04-01 20:31:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5580 transitions. [2023-04-01 20:31:17,378 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5580 transitions. Word has length 173 [2023-04-01 20:31:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:17,379 INFO L495 AbstractCegarLoop]: Abstraction has 3758 states and 5580 transitions. [2023-04-01 20:31:17,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:31:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5580 transitions. [2023-04-01 20:31:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-01 20:31:17,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:17,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:17,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 20:31:17,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:17,594 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:17,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1750919136, now seen corresponding path program 1 times [2023-04-01 20:31:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:17,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997424211] [2023-04-01 20:31:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:17,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:18,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:18,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:18,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:31:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:31:18,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:18,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997424211] [2023-04-01 20:31:18,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997424211] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:18,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85047611] [2023-04-01 20:31:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:18,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:18,713 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 20:31:18,736 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 20:31:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:18,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:31:18,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 20:31:19,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:31:19,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85047611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:19,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:31:19,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:31:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427208394] [2023-04-01 20:31:19,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:19,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:31:19,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:31:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:31:19,064 INFO L87 Difference]: Start difference. First operand 3758 states and 5580 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:31:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:19,536 INFO L93 Difference]: Finished difference Result 11384 states and 17505 transitions. [2023-04-01 20:31:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:31:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 182 [2023-04-01 20:31:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:19,579 INFO L225 Difference]: With dead ends: 11384 [2023-04-01 20:31:19,579 INFO L226 Difference]: Without dead ends: 7632 [2023-04-01 20:31:19,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:31:19,593 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1105 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:19,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1105 Valid, 945 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:31:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7632 states. [2023-04-01 20:31:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7632 to 7554. [2023-04-01 20:31:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 7279 states have (on average 1.4258826761917847) internal successors, (10379), 7486 states have internal predecessors, (10379), 34 states have call successors, (34), 34 states have call predecessors, (34), 240 states have return successors, (901), 33 states have call predecessors, (901), 33 states have call successors, (901) [2023-04-01 20:31:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 11314 transitions. [2023-04-01 20:31:19,898 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 11314 transitions. Word has length 182 [2023-04-01 20:31:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:19,899 INFO L495 AbstractCegarLoop]: Abstraction has 7554 states and 11314 transitions. [2023-04-01 20:31:19,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:31:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 11314 transitions. [2023-04-01 20:31:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-04-01 20:31:19,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:19,915 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:19,925 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 20:31:20,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:20,125 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:20,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:20,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1568569258, now seen corresponding path program 1 times [2023-04-01 20:31:20,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:20,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572090251] [2023-04-01 20:31:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:20,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:20,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:20,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:20,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 20:31:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:31:20,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:20,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572090251] [2023-04-01 20:31:20,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572090251] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:20,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395657302] [2023-04-01 20:31:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:20,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:20,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:20,786 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 20:31:20,789 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 20:31:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:21,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:31:21,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:31:21,087 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:31:21,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395657302] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:21,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:31:21,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 20:31:21,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081459993] [2023-04-01 20:31:21,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:21,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:31:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:21,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:31:21,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:31:21,092 INFO L87 Difference]: Start difference. First operand 7554 states and 11314 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 20:31:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:22,395 INFO L93 Difference]: Finished difference Result 22506 states and 35564 transitions. [2023-04-01 20:31:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:31:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 186 [2023-04-01 20:31:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:22,481 INFO L225 Difference]: With dead ends: 22506 [2023-04-01 20:31:22,481 INFO L226 Difference]: Without dead ends: 14958 [2023-04-01 20:31:22,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:31:22,506 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 710 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:22,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 150 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 20:31:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14958 states. [2023-04-01 20:31:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14958 to 14814. [2023-04-01 20:31:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14814 states, 14157 states have (on average 1.3093875821148548) internal successors, (18537), 14682 states have internal predecessors, (18537), 66 states have call successors, (66), 66 states have call predecessors, (66), 590 states have return successors, (2541), 65 states have call predecessors, (2541), 65 states have call successors, (2541) [2023-04-01 20:31:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14814 states to 14814 states and 21144 transitions. [2023-04-01 20:31:23,107 INFO L78 Accepts]: Start accepts. Automaton has 14814 states and 21144 transitions. Word has length 186 [2023-04-01 20:31:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:23,108 INFO L495 AbstractCegarLoop]: Abstraction has 14814 states and 21144 transitions. [2023-04-01 20:31:23,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 20:31:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 14814 states and 21144 transitions. [2023-04-01 20:31:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-01 20:31:23,134 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:23,134 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:23,143 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 20:31:23,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:23,342 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:23,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash -7598214, now seen corresponding path program 1 times [2023-04-01 20:31:23,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:23,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957206349] [2023-04-01 20:31:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:23,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:23,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:23,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:23,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:31:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:31:24,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:24,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957206349] [2023-04-01 20:31:24,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957206349] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:24,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851257996] [2023-04-01 20:31:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:24,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:24,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:24,033 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 20:31:24,036 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 20:31:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:24,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:31:24,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 20:31:24,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:31:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851257996] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:24,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:31:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:31:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111932675] [2023-04-01 20:31:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:24,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:31:24,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:31:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:31:24,422 INFO L87 Difference]: Start difference. First operand 14814 states and 21144 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 20:31:25,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:25,570 INFO L93 Difference]: Finished difference Result 42694 states and 62614 transitions. [2023-04-01 20:31:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:31:25,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 188 [2023-04-01 20:31:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:25,696 INFO L225 Difference]: With dead ends: 42694 [2023-04-01 20:31:25,697 INFO L226 Difference]: Without dead ends: 27886 [2023-04-01 20:31:25,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:31:25,744 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 104 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:25,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 256 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:31:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27886 states. [2023-04-01 20:31:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27886 to 27682. [2023-04-01 20:31:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27682 states, 26689 states have (on average 1.3040953201693581) internal successors, (34805), 27430 states have internal predecessors, (34805), 126 states have call successors, (126), 126 states have call predecessors, (126), 866 states have return successors, (5677), 125 states have call predecessors, (5677), 125 states have call successors, (5677) [2023-04-01 20:31:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27682 states to 27682 states and 40608 transitions. [2023-04-01 20:31:26,672 INFO L78 Accepts]: Start accepts. Automaton has 27682 states and 40608 transitions. Word has length 188 [2023-04-01 20:31:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:26,674 INFO L495 AbstractCegarLoop]: Abstraction has 27682 states and 40608 transitions. [2023-04-01 20:31:26,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 20:31:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 27682 states and 40608 transitions. [2023-04-01 20:31:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-04-01 20:31:26,718 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:26,719 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:26,731 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 20:31:26,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:26,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:26,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1419043554, now seen corresponding path program 1 times [2023-04-01 20:31:26,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:26,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593840282] [2023-04-01 20:31:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:26,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:27,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:27,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:27,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:31:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:31:28,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:28,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593840282] [2023-04-01 20:31:28,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593840282] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:28,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347161449] [2023-04-01 20:31:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:28,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:28,078 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 20:31:28,081 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 20:31:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:28,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:31:28,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:31:28,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:31:28,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347161449] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:28,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:31:28,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-04-01 20:31:28,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715199483] [2023-04-01 20:31:28,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:28,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:31:28,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:31:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:31:28,477 INFO L87 Difference]: Start difference. First operand 27682 states and 40608 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 20:31:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:29,887 INFO L93 Difference]: Finished difference Result 67326 states and 97438 transitions. [2023-04-01 20:31:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:31:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 196 [2023-04-01 20:31:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:30,053 INFO L225 Difference]: With dead ends: 67326 [2023-04-01 20:31:30,054 INFO L226 Difference]: Without dead ends: 39650 [2023-04-01 20:31:30,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:31:30,128 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 96 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:30,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 435 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:31:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39650 states. [2023-04-01 20:31:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39650 to 39578. [2023-04-01 20:31:31,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39578 states, 38321 states have (on average 1.2527073928133399) internal successors, (48005), 39214 states have internal predecessors, (48005), 182 states have call successors, (182), 182 states have call predecessors, (182), 1074 states have return successors, (7445), 181 states have call predecessors, (7445), 181 states have call successors, (7445) [2023-04-01 20:31:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39578 states to 39578 states and 55632 transitions. [2023-04-01 20:31:31,548 INFO L78 Accepts]: Start accepts. Automaton has 39578 states and 55632 transitions. Word has length 196 [2023-04-01 20:31:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:31,549 INFO L495 AbstractCegarLoop]: Abstraction has 39578 states and 55632 transitions. [2023-04-01 20:31:31,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 20:31:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 39578 states and 55632 transitions. [2023-04-01 20:31:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-04-01 20:31:31,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:31,624 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:31,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 20:31:31,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:31,832 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:31,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash 617040191, now seen corresponding path program 1 times [2023-04-01 20:31:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:31,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145672054] [2023-04-01 20:31:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:32,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:32,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:32,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:31:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:32,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 20:31:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 80 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 20:31:32,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:32,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145672054] [2023-04-01 20:31:32,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145672054] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:32,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014718454] [2023-04-01 20:31:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:32,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:32,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:32,632 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 20:31:32,654 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 20:31:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:32,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:31:32,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 20:31:32,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:31:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 84 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 20:31:33,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014718454] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:31:33,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:31:33,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-04-01 20:31:33,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022302971] [2023-04-01 20:31:33,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:31:33,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:31:33,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:33,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:31:33,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:31:33,028 INFO L87 Difference]: Start difference. First operand 39578 states and 55632 transitions. Second operand has 8 states, 8 states have (on average 27.25) internal successors, (218), 6 states have internal predecessors, (218), 3 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:31:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:34,628 INFO L93 Difference]: Finished difference Result 76548 states and 107933 transitions. [2023-04-01 20:31:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:31:34,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.25) internal successors, (218), 6 states have internal predecessors, (218), 3 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 222 [2023-04-01 20:31:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:34,752 INFO L225 Difference]: With dead ends: 76548 [2023-04-01 20:31:34,752 INFO L226 Difference]: Without dead ends: 36976 [2023-04-01 20:31:34,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:31:34,806 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 900 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:34,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 43 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 20:31:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36976 states. [2023-04-01 20:31:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36976 to 36964. [2023-04-01 20:31:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36964 states, 35871 states have (on average 1.2101976526999525) internal successors, (43411), 36620 states have internal predecessors, (43411), 172 states have call successors, (172), 172 states have call predecessors, (172), 920 states have return successors, (5625), 171 states have call predecessors, (5625), 171 states have call successors, (5625) [2023-04-01 20:31:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36964 states to 36964 states and 49208 transitions. [2023-04-01 20:31:35,926 INFO L78 Accepts]: Start accepts. Automaton has 36964 states and 49208 transitions. Word has length 222 [2023-04-01 20:31:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:35,926 INFO L495 AbstractCegarLoop]: Abstraction has 36964 states and 49208 transitions. [2023-04-01 20:31:35,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.25) internal successors, (218), 6 states have internal predecessors, (218), 3 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:31:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 36964 states and 49208 transitions. [2023-04-01 20:31:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-04-01 20:31:35,981 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:35,981 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:35,995 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 20:31:36,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:36,190 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:36,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:36,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1681121431, now seen corresponding path program 1 times [2023-04-01 20:31:36,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:36,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112735158] [2023-04-01 20:31:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:36,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:37,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:37,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:37,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 20:31:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 96 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:31:37,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:37,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112735158] [2023-04-01 20:31:37,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112735158] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:37,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291426972] [2023-04-01 20:31:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:37,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:37,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:37,629 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 20:31:37,632 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 20:31:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:37,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:31:37,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:31:37,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:31:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:31:38,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291426972] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:31:38,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:31:38,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-04-01 20:31:38,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614253981] [2023-04-01 20:31:38,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:31:38,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:31:38,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:38,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:31:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:31:38,023 INFO L87 Difference]: Start difference. First operand 36964 states and 49208 transitions. Second operand has 12 states, 12 states have (on average 28.916666666666668) internal successors, (347), 10 states have internal predecessors, (347), 4 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 20:31:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:49,393 INFO L93 Difference]: Finished difference Result 108752 states and 189816 transitions. [2023-04-01 20:31:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-04-01 20:31:49,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 28.916666666666668) internal successors, (347), 10 states have internal predecessors, (347), 4 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 254 [2023-04-01 20:31:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:49,867 INFO L225 Difference]: With dead ends: 108752 [2023-04-01 20:31:49,867 INFO L226 Difference]: Without dead ends: 71794 [2023-04-01 20:31:49,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=865, Invalid=4835, Unknown=0, NotChecked=0, Total=5700 [2023-04-01 20:31:49,962 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 4397 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 8485 mSolverCounterSat, 1580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4409 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 10065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1580 IncrementalHoareTripleChecker+Valid, 8485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:49,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4409 Valid, 538 Invalid, 10065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1580 Valid, 8485 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 20:31:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2023-04-01 20:31:52,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 66663. [2023-04-01 20:31:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66663 states, 64016 states have (on average 1.167629967508123) internal successors, (74747), 66029 states have internal predecessors, (74747), 333 states have call successors, (333), 301 states have call predecessors, (333), 2313 states have return successors, (9790), 332 states have call predecessors, (9790), 332 states have call successors, (9790) [2023-04-01 20:31:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66663 states to 66663 states and 84870 transitions. [2023-04-01 20:31:53,185 INFO L78 Accepts]: Start accepts. Automaton has 66663 states and 84870 transitions. Word has length 254 [2023-04-01 20:31:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:53,185 INFO L495 AbstractCegarLoop]: Abstraction has 66663 states and 84870 transitions. [2023-04-01 20:31:53,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.916666666666668) internal successors, (347), 10 states have internal predecessors, (347), 4 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 20:31:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 66663 states and 84870 transitions. [2023-04-01 20:31:53,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-04-01 20:31:53,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:53,462 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, 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, 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] [2023-04-01 20:31:53,475 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 20:31:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:53,670 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:53,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1217986791, now seen corresponding path program 1 times [2023-04-01 20:31:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078211784] [2023-04-01 20:31:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 20:31:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:31:54,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:54,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078211784] [2023-04-01 20:31:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078211784] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085328853] [2023-04-01 20:31:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:54,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:54,380 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 20:31:54,383 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 20:31:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:31:54,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:31:54,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:31:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:31:54,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085328853] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:31:54,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:31:54,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:31:54,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644578533] [2023-04-01 20:31:54,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:31:54,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:31:54,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:54,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:31:54,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:31:54,829 INFO L87 Difference]: Start difference. First operand 66663 states and 84870 transitions. Second operand has 12 states, 12 states have (on average 26.666666666666668) internal successors, (320), 10 states have internal predecessors, (320), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:32:05,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:32:05,214 INFO L93 Difference]: Finished difference Result 165821 states and 248913 transitions. [2023-04-01 20:32:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-04-01 20:32:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 26.666666666666668) internal successors, (320), 10 states have internal predecessors, (320), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 277 [2023-04-01 20:32:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:32:05,882 INFO L225 Difference]: With dead ends: 165821 [2023-04-01 20:32:05,882 INFO L226 Difference]: Without dead ends: 99176 [2023-04-01 20:32:05,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=483, Invalid=2709, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 20:32:05,974 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1990 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 9651 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2000 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 10411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 9651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:32:05,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2000 Valid, 489 Invalid, 10411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 9651 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-01 20:32:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99176 states. [2023-04-01 20:32:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99176 to 93139. [2023-04-01 20:32:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93139 states, 89953 states have (on average 1.1170500150078375) internal successors, (100482), 92266 states have internal predecessors, (100482), 447 states have call successors, (447), 426 states have call predecessors, (447), 2738 states have return successors, (9806), 446 states have call predecessors, (9806), 446 states have call successors, (9806) [2023-04-01 20:32:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93139 states to 93139 states and 110735 transitions. [2023-04-01 20:32:08,854 INFO L78 Accepts]: Start accepts. Automaton has 93139 states and 110735 transitions. Word has length 277 [2023-04-01 20:32:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:32:08,855 INFO L495 AbstractCegarLoop]: Abstraction has 93139 states and 110735 transitions. [2023-04-01 20:32:08,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.666666666666668) internal successors, (320), 10 states have internal predecessors, (320), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:32:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 93139 states and 110735 transitions. [2023-04-01 20:32:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-04-01 20:32:09,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:32:09,032 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 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, 3, 3, 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] [2023-04-01 20:32:09,040 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 20:32:09,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 20:32:09,240 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:32:09,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:32:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash -360375778, now seen corresponding path program 1 times [2023-04-01 20:32:09,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:32:09,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704211188] [2023-04-01 20:32:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:32:09,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:32:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:11,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:32:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:11,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:32:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:11,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:32:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-04-01 20:32:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:11,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-04-01 20:32:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:11,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2023-04-01 20:32:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 368 proven. 203 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-01 20:32:11,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:32:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704211188] [2023-04-01 20:32:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704211188] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:32:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197440130] [2023-04-01 20:32:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:32:11,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:32:11,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:32:11,985 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 20:32:11,988 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 20:32:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:12,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:32:12,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:32:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 556 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-04-01 20:32:12,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:32:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 464 proven. 123 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-01 20:32:12,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197440130] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:32:12,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:32:12,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2023-04-01 20:32:12,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096171331] [2023-04-01 20:32:12,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:32:12,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 20:32:12,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:32:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 20:32:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-04-01 20:32:12,934 INFO L87 Difference]: Start difference. First operand 93139 states and 110735 transitions. Second operand has 19 states, 19 states have (on average 34.526315789473685) internal successors, (656), 17 states have internal predecessors, (656), 6 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 20:32:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:32:35,379 INFO L93 Difference]: Finished difference Result 463987 states and 616576 transitions. [2023-04-01 20:32:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-04-01 20:32:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 34.526315789473685) internal successors, (656), 17 states have internal predecessors, (656), 6 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 513 [2023-04-01 20:32:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:32:37,730 INFO L225 Difference]: With dead ends: 463987 [2023-04-01 20:32:37,730 INFO L226 Difference]: Without dead ends: 375776 [2023-04-01 20:32:37,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1236 GetRequests, 1116 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5094 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2007, Invalid=12513, Unknown=0, NotChecked=0, Total=14520 [2023-04-01 20:32:37,941 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 9764 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 13010 mSolverCounterSat, 1082 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9764 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 14092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1082 IncrementalHoareTripleChecker+Valid, 13010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:32:37,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9764 Valid, 947 Invalid, 14092 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1082 Valid, 13010 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-04-01 20:32:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375776 states. [2023-04-01 20:32:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375776 to 370323. [2023-04-01 20:32:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370323 states, 356363 states have (on average 1.1062006998481886) internal successors, (394209), 365370 states have internal predecessors, (394209), 3292 states have call successors, (3292), 1661 states have call predecessors, (3292), 10667 states have return successors, (74903), 3291 states have call predecessors, (74903), 3291 states have call successors, (74903) [2023-04-01 20:32:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370323 states to 370323 states and 472404 transitions. [2023-04-01 20:32:52,079 INFO L78 Accepts]: Start accepts. Automaton has 370323 states and 472404 transitions. Word has length 513 [2023-04-01 20:32:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:32:52,079 INFO L495 AbstractCegarLoop]: Abstraction has 370323 states and 472404 transitions. [2023-04-01 20:32:52,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 34.526315789473685) internal successors, (656), 17 states have internal predecessors, (656), 6 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 20:32:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 370323 states and 472404 transitions. [2023-04-01 20:32:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-04-01 20:32:53,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:32:53,241 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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] [2023-04-01 20:32:53,248 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 20:32:53,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:32:53,443 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:32:53,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:32:53,443 INFO L85 PathProgramCache]: Analyzing trace with hash 428961077, now seen corresponding path program 1 times [2023-04-01 20:32:53,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:32:53,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751950039] [2023-04-01 20:32:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:32:53,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:32:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:54,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:32:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:32:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:54,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:32:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:54,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-04-01 20:32:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:54,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2023-04-01 20:32:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 371 proven. 199 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-01 20:32:54,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:32:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751950039] [2023-04-01 20:32:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751950039] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:32:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146875235] [2023-04-01 20:32:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:32:54,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:32:54,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:32:54,809 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 20:32:54,810 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 20:32:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:55,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:32:55,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:32:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-04-01 20:32:55,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:32:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 375 proven. 198 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-01 20:32:55,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146875235] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:32:55,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:32:55,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2023-04-01 20:32:55,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030634486] [2023-04-01 20:32:55,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:32:55,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:32:55,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:32:55,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:32:55,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:32:55,562 INFO L87 Difference]: Start difference. First operand 370323 states and 472404 transitions. Second operand has 13 states, 13 states have (on average 44.84615384615385) internal successors, (583), 11 states have internal predecessors, (583), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:33:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:33:25,927 INFO L93 Difference]: Finished difference Result 991593 states and 1331855 transitions. [2023-04-01 20:33:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 20:33:25,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 44.84615384615385) internal successors, (583), 11 states have internal predecessors, (583), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 520 [2023-04-01 20:33:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:33:31,227 INFO L225 Difference]: With dead ends: 991593 [2023-04-01 20:33:31,227 INFO L226 Difference]: Without dead ends: 625176 [2023-04-01 20:33:32,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 1057 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2023-04-01 20:33:32,575 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1766 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 6626 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1767 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 6626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:33:32,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1767 Valid, 282 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 6626 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 20:33:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625176 states.