/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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:30:34,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:30:34,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:30:34,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:30:34,095 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 20:30:34,112 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:30:34,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:30:34,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:30:34,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:30:34,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:30:34,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:30:34,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:30:34,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:30:34,115 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:30:34,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:30:34,116 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:30:34,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:30:34,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:30:34,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:30:34,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:30:34,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:30:34,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:30:34,117 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:30:34,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:30:34,117 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:30:34,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:30:34,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:30:34,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:30:34,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:30:34,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:30:34,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:30:34,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:30:34,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:30:34,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:30:34,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:30:34,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:30:34,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:30:34,119 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:30:34,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:30:34,119 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:30:34,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:30:34,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:30:34,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:30:34,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:30:34,364 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:30:34,364 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:30:34,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2023-04-01 20:30:35,545 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:30:35,891 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:30:35,892 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2023-04-01 20:30:35,911 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee114d1a/d8f2b45777c34fe285f465031aee9b7a/FLAG63b17f96a [2023-04-01 20:30:35,927 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee114d1a/d8f2b45777c34fe285f465031aee9b7a [2023-04-01 20:30:35,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:30:35,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:30:35,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:30:35,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:30:35,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:30:35,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:30:35" (1/1) ... [2023-04-01 20:30:35,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1acb60d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:35, skipping insertion in model container [2023-04-01 20:30:35,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:30:35" (1/1) ... [2023-04-01 20:30:35,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:30:36,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:30:36,543 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_label42.c[60691,60704] [2023-04-01 20:30:36,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:30:36,587 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:30:36,757 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_label42.c[60691,60704] [2023-04-01 20:30:36,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:30:36,782 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:30:36,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36 WrapperNode [2023-04-01 20:30:36,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:30:36,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:30:36,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:30:36,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:30:36,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (1/1) ... [2023-04-01 20:30:36,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (1/1) ... [2023-04-01 20:30:36,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (1/1) ... [2023-04-01 20:30:36,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (1/1) ... [2023-04-01 20:30:36,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (1/1) ... [2023-04-01 20:30:36,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (1/1) ... [2023-04-01 20:30:36,938 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (1/1) ... [2023-04-01 20:30:36,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (1/1) ... [2023-04-01 20:30:36,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:30:36,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:30:36,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:30:36,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:30:36,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (1/1) ... [2023-04-01 20:30:36,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:30:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:30:36,996 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 20:30:37,000 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 20:30:37,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:30:37,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:30:37,036 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:30:37,036 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:30:37,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:30:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:30:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:30:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:30:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:30:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:30:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:30:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:30:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:30:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:30:37,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:30:37,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:30:37,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:30:37,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:30:37,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:30:37,140 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:30:37,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:30:38,922 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:30:38,938 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:30:38,938 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:30:38,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:30:38 BoogieIcfgContainer [2023-04-01 20:30:38,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:30:38,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:30:38,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:30:38,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:30:38,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:30:35" (1/3) ... [2023-04-01 20:30:38,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a1de2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:30:38, skipping insertion in model container [2023-04-01 20:30:38,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:30:36" (2/3) ... [2023-04-01 20:30:38,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a1de2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:30:38, skipping insertion in model container [2023-04-01 20:30:38,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:30:38" (3/3) ... [2023-04-01 20:30:38,951 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label42.c [2023-04-01 20:30:38,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:30:38,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:30:39,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:30:39,029 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;@1e3c6879, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:30:39,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:30:39,039 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 20:30:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-04-01 20:30:39,055 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:30:39,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:30:39,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:30:39,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:30:39,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1240962750, now seen corresponding path program 1 times [2023-04-01 20:30:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:30:39,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685180856] [2023-04-01 20:30:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:30:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:40,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:30:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:40,362 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 20:30:40,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:30:40,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685180856] [2023-04-01 20:30:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685180856] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:30:40,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:30:40,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:30:40,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791417547] [2023-04-01 20:30:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:30:40,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:30:40,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:30:40,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:30:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:30:40,418 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 4 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 20:30:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:30:42,457 INFO L93 Difference]: Finished difference Result 889 states and 1547 transitions. [2023-04-01 20:30:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:30:42,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 202 [2023-04-01 20:30:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:30:42,503 INFO L225 Difference]: With dead ends: 889 [2023-04-01 20:30:42,503 INFO L226 Difference]: Without dead ends: 485 [2023-04-01 20:30:42,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:30:42,519 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 643 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:30:42,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 51 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 20:30:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-04-01 20:30:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2023-04-01 20:30:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 465 states have (on average 1.5483870967741935) internal successors, (720), 467 states have internal predecessors, (720), 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 20:30:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 731 transitions. [2023-04-01 20:30:42,633 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 731 transitions. Word has length 202 [2023-04-01 20:30:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:30:42,633 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 731 transitions. [2023-04-01 20:30:42,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 20:30:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 731 transitions. [2023-04-01 20:30:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-04-01 20:30:42,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:30:42,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:30:42,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:30:42,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:30:42,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:30:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1251951905, now seen corresponding path program 1 times [2023-04-01 20:30:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:30:42,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72879937] [2023-04-01 20:30:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:30:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:30:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:43,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:30:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:43,411 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 20:30:43,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:30:43,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72879937] [2023-04-01 20:30:43,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72879937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:30:43,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:30:43,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:30:43,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036865335] [2023-04-01 20:30:43,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:30:43,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:30:43,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:30:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:30:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:30:43,419 INFO L87 Difference]: Start difference. First operand 475 states and 731 transitions. Second operand has 7 states, 6 states have (on average 34.666666666666664) internal successors, (208), 4 states have internal predecessors, (208), 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 20:30:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:30:45,262 INFO L93 Difference]: Finished difference Result 1426 states and 2228 transitions. [2023-04-01 20:30:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:30:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 34.666666666666664) internal successors, (208), 4 states have internal predecessors, (208), 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 214 [2023-04-01 20:30:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:30:45,269 INFO L225 Difference]: With dead ends: 1426 [2023-04-01 20:30:45,270 INFO L226 Difference]: Without dead ends: 957 [2023-04-01 20:30:45,275 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 20:30:45,277 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1647 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:30:45,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 125 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 20:30:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-01 20:30:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 936. [2023-04-01 20:30:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 915 states have (on average 1.521311475409836) internal successors, (1392), 924 states have internal predecessors, (1392), 6 states have call successors, (6), 6 states have call predecessors, (6), 14 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 20:30:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1427 transitions. [2023-04-01 20:30:45,352 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1427 transitions. Word has length 214 [2023-04-01 20:30:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:30:45,359 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1427 transitions. [2023-04-01 20:30:45,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 34.666666666666664) internal successors, (208), 4 states have internal predecessors, (208), 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 20:30:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1427 transitions. [2023-04-01 20:30:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-01 20:30:45,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:30:45,368 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:30:45,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:30:45,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:30:45,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:30:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1229713310, now seen corresponding path program 1 times [2023-04-01 20:30:45,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:30:45,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840994885] [2023-04-01 20:30:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:45,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:30:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:46,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:30:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:46,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:30:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:30:46,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:30:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840994885] [2023-04-01 20:30:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840994885] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:30:46,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:30:46,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:30:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876526551] [2023-04-01 20:30:46,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:30:46,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:30:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:30:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:30:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:30:46,161 INFO L87 Difference]: Start difference. First operand 936 states and 1427 transitions. Second operand has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 5 states have internal predecessors, (213), 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 20:30:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:30:49,016 INFO L93 Difference]: Finished difference Result 3673 states and 5837 transitions. [2023-04-01 20:30:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:30:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 5 states have internal predecessors, (213), 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 219 [2023-04-01 20:30:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:30:49,032 INFO L225 Difference]: With dead ends: 3673 [2023-04-01 20:30:49,032 INFO L226 Difference]: Without dead ends: 2743 [2023-04-01 20:30:49,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:30:49,037 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1081 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:30:49,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 165 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 20:30:49,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2023-04-01 20:30:49,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2703. [2023-04-01 20:30:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2630 states have (on average 1.4095057034220533) internal successors, (3707), 2675 states have internal predecessors, (3707), 14 states have call successors, (14), 14 states have call predecessors, (14), 58 states have return successors, (218), 13 states have call predecessors, (218), 13 states have call successors, (218) [2023-04-01 20:30:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 3939 transitions. [2023-04-01 20:30:49,161 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 3939 transitions. Word has length 219 [2023-04-01 20:30:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:30:49,162 INFO L495 AbstractCegarLoop]: Abstraction has 2703 states and 3939 transitions. [2023-04-01 20:30:49,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 5 states have internal predecessors, (213), 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 20:30:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 3939 transitions. [2023-04-01 20:30:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-04-01 20:30:49,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:30:49,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:30:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:30:49,172 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:30:49,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:30:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash 269906351, now seen corresponding path program 1 times [2023-04-01 20:30:49,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:30:49,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715915036] [2023-04-01 20:30:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:30:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:50,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:30:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:50,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:30:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:50,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:30:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:30:50,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:30:50,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715915036] [2023-04-01 20:30:50,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715915036] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:30:50,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476347215] [2023-04-01 20:30:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:50,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:30:50,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:30:50,249 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 20:30:50,275 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 20:30:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:50,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:30:50,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:30:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:30:50,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:30:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:30:50,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476347215] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:30:50,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:30:50,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:30:50,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800306195] [2023-04-01 20:30:50,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:30:50,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:30:50,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:30:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:30:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:30:50,872 INFO L87 Difference]: Start difference. First operand 2703 states and 3939 transitions. Second operand has 12 states, 12 states have (on average 20.166666666666668) internal successors, (242), 10 states have internal predecessors, (242), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:30:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:30:57,851 INFO L93 Difference]: Finished difference Result 14783 states and 26112 transitions. [2023-04-01 20:30:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-04-01 20:30:57,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.166666666666668) internal successors, (242), 10 states have internal predecessors, (242), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 227 [2023-04-01 20:30:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:30:57,952 INFO L225 Difference]: With dead ends: 14783 [2023-04-01 20:30:57,952 INFO L226 Difference]: Without dead ends: 12086 [2023-04-01 20:30:57,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 492 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=508, Invalid=2462, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 20:30:57,980 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 3629 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 5459 mSolverCounterSat, 1376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3638 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 6835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1376 IncrementalHoareTripleChecker+Valid, 5459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:30:57,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3638 Valid, 308 Invalid, 6835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1376 Valid, 5459 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 20:30:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2023-04-01 20:30:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 11711. [2023-04-01 20:30:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11711 states, 11325 states have (on average 1.2842384105960265) internal successors, (14544), 11586 states have internal predecessors, (14544), 70 states have call successors, (70), 55 states have call predecessors, (70), 315 states have return successors, (2282), 69 states have call predecessors, (2282), 69 states have call successors, (2282) [2023-04-01 20:30:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11711 states to 11711 states and 16896 transitions. [2023-04-01 20:30:58,591 INFO L78 Accepts]: Start accepts. Automaton has 11711 states and 16896 transitions. Word has length 227 [2023-04-01 20:30:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:30:58,591 INFO L495 AbstractCegarLoop]: Abstraction has 11711 states and 16896 transitions. [2023-04-01 20:30:58,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.166666666666668) internal successors, (242), 10 states have internal predecessors, (242), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:30:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 11711 states and 16896 transitions. [2023-04-01 20:30:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-04-01 20:30:58,630 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:30:58,630 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:30:58,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 20:30:58,840 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 20:30:58,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:30:58,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:30:58,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1123336470, now seen corresponding path program 1 times [2023-04-01 20:30:58,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:30:58,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212243232] [2023-04-01 20:30:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:58,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:30:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:59,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:30:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:59,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:30:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:59,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 20:30:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:30:59,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:30:59,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212243232] [2023-04-01 20:30:59,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212243232] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:30:59,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943225714] [2023-04-01 20:30:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:59,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:30:59,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:30:59,498 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 20:30:59,509 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 20:30:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:59,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:30:59,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:30:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:30:59,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:30:59,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943225714] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:30:59,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:30:59,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:30:59,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052106053] [2023-04-01 20:30:59,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:30:59,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:30:59,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:30:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:30:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:30:59,947 INFO L87 Difference]: Start difference. First operand 11711 states and 16896 transitions. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 4 states have internal predecessors, (225), 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 20:31:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:01,336 INFO L93 Difference]: Finished difference Result 35007 states and 54267 transitions. [2023-04-01 20:31:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:31:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 4 states have internal predecessors, (225), 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 246 [2023-04-01 20:31:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:01,472 INFO L225 Difference]: With dead ends: 35007 [2023-04-01 20:31:01,472 INFO L226 Difference]: Without dead ends: 23302 [2023-04-01 20:31:01,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 247 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 20:31:01,505 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 791 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:01,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 165 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 20:31:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23302 states. [2023-04-01 20:31:02,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23302 to 23018. [2023-04-01 20:31:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23018 states, 22287 states have (on average 1.2485754027011262) internal successors, (27827), 22778 states have internal predecessors, (27827), 133 states have call successors, (133), 107 states have call predecessors, (133), 597 states have return successors, (4832), 132 states have call predecessors, (4832), 132 states have call successors, (4832) [2023-04-01 20:31:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23018 states to 23018 states and 32792 transitions. [2023-04-01 20:31:02,509 INFO L78 Accepts]: Start accepts. Automaton has 23018 states and 32792 transitions. Word has length 246 [2023-04-01 20:31:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:02,510 INFO L495 AbstractCegarLoop]: Abstraction has 23018 states and 32792 transitions. [2023-04-01 20:31:02,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 4 states have internal predecessors, (225), 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 20:31:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 23018 states and 32792 transitions. [2023-04-01 20:31:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-04-01 20:31:02,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:02,571 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:02,580 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 20:31:02,779 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 20:31:02,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:02,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2022184009, now seen corresponding path program 1 times [2023-04-01 20:31:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:02,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086563050] [2023-04-01 20:31:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:03,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:03,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:03,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:31:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:31:04,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:04,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086563050] [2023-04-01 20:31:04,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086563050] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:04,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450071661] [2023-04-01 20:31:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:04,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:04,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:04,003 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 20:31:04,008 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 20:31:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:04,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:31:04,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:31:04,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:31:04,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450071661] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:04,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:31:04,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 20:31:04,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598165327] [2023-04-01 20:31:04,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:04,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:31:04,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:04,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:31:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:31:04,457 INFO L87 Difference]: Start difference. First operand 23018 states and 32792 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 20:31:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:05,448 INFO L93 Difference]: Finished difference Result 38805 states and 55675 transitions. [2023-04-01 20:31:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:31:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 258 [2023-04-01 20:31:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:05,512 INFO L225 Difference]: With dead ends: 38805 [2023-04-01 20:31:05,512 INFO L226 Difference]: Without dead ends: 15793 [2023-04-01 20:31:05,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:31:05,565 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 82 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:05,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 391 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:31:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2023-04-01 20:31:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 15781. [2023-04-01 20:31:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15781 states, 15202 states have (on average 1.203986317589791) internal successors, (18303), 15616 states have internal predecessors, (18303), 92 states have call successors, (92), 73 states have call predecessors, (92), 486 states have return successors, (2883), 91 states have call predecessors, (2883), 91 states have call successors, (2883) [2023-04-01 20:31:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15781 states to 15781 states and 21278 transitions. [2023-04-01 20:31:06,024 INFO L78 Accepts]: Start accepts. Automaton has 15781 states and 21278 transitions. Word has length 258 [2023-04-01 20:31:06,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:06,025 INFO L495 AbstractCegarLoop]: Abstraction has 15781 states and 21278 transitions. [2023-04-01 20:31:06,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 20:31:06,025 INFO L276 IsEmpty]: Start isEmpty. Operand 15781 states and 21278 transitions. [2023-04-01 20:31:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-04-01 20:31:06,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:06,069 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:06,079 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 20:31:06,277 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 20:31:06,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:06,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:06,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1891826231, now seen corresponding path program 1 times [2023-04-01 20:31:06,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:06,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598647700] [2023-04-01 20:31:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:06,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:07,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:07,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:07,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:31:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:07,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-01 20:31:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 84 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 20:31:07,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:07,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598647700] [2023-04-01 20:31:07,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598647700] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:07,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669347851] [2023-04-01 20:31:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:07,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:07,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:07,631 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 20:31:07,642 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 20:31:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:07,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:31:07,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:31:08,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:31:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:31:08,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669347851] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:31:08,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:31:08,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2023-04-01 20:31:08,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677028324] [2023-04-01 20:31:08,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:31:08,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:31:08,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:08,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:31:08,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:31:08,091 INFO L87 Difference]: Start difference. First operand 15781 states and 21278 transitions. Second operand has 15 states, 15 states have (on average 20.133333333333333) internal successors, (302), 13 states have internal predecessors, (302), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:31:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:13,452 INFO L93 Difference]: Finished difference Result 59436 states and 86009 transitions. [2023-04-01 20:31:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 20:31:13,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.133333333333333) internal successors, (302), 13 states have internal predecessors, (302), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 275 [2023-04-01 20:31:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:13,641 INFO L225 Difference]: With dead ends: 59436 [2023-04-01 20:31:13,642 INFO L226 Difference]: Without dead ends: 43661 [2023-04-01 20:31:13,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=479, Invalid=1327, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 20:31:13,677 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4297 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2933 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4297 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 2933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:13,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4297 Valid, 168 Invalid, 3451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 2933 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 20:31:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43661 states. [2023-04-01 20:31:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43661 to 42757. [2023-04-01 20:31:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42757 states, 41517 states have (on average 1.1893922971312956) internal successors, (49380), 42346 states have internal predecessors, (49380), 212 states have call successors, (212), 199 states have call predecessors, (212), 1027 states have return successors, (6371), 211 states have call predecessors, (6371), 211 states have call successors, (6371) [2023-04-01 20:31:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42757 states to 42757 states and 55963 transitions. [2023-04-01 20:31:15,057 INFO L78 Accepts]: Start accepts. Automaton has 42757 states and 55963 transitions. Word has length 275 [2023-04-01 20:31:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:15,057 INFO L495 AbstractCegarLoop]: Abstraction has 42757 states and 55963 transitions. [2023-04-01 20:31:15,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.133333333333333) internal successors, (302), 13 states have internal predecessors, (302), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:31:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 42757 states and 55963 transitions. [2023-04-01 20:31:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-04-01 20:31:15,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:15,118 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:15,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 20:31:15,326 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 20:31:15,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:15,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:15,327 INFO L85 PathProgramCache]: Analyzing trace with hash 790573226, now seen corresponding path program 1 times [2023-04-01 20:31:15,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:15,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144415963] [2023-04-01 20:31:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:15,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:15,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:15,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:15,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:31:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:15,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-01 20:31:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:31:15,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:15,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144415963] [2023-04-01 20:31:15,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144415963] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:15,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899226815] [2023-04-01 20:31:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:15,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:15,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:15,849 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 20:31:15,851 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 20:31:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:16,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:31:16,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 20:31:16,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:31:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 85 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 20:31:16,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899226815] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:31:16,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:31:16,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:31:16,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657742567] [2023-04-01 20:31:16,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:31:16,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:31:16,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:31:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:31:16,478 INFO L87 Difference]: Start difference. First operand 42757 states and 55963 transitions. Second operand has 12 states, 12 states have (on average 29.25) internal successors, (351), 10 states have internal predecessors, (351), 4 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 20:31:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:22,531 INFO L93 Difference]: Finished difference Result 119966 states and 175044 transitions. [2023-04-01 20:31:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 20:31:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 29.25) internal successors, (351), 10 states have internal predecessors, (351), 4 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 276 [2023-04-01 20:31:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:22,931 INFO L225 Difference]: With dead ends: 119966 [2023-04-01 20:31:22,932 INFO L226 Difference]: Without dead ends: 77219 [2023-04-01 20:31:23,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 574 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 20:31:23,198 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3438 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 4365 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 4866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 4365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:23,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 233 Invalid, 4866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 4365 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 20:31:23,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77219 states. [2023-04-01 20:31:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77219 to 74228. [2023-04-01 20:31:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74228 states, 72027 states have (on average 1.1417385147236454) internal successors, (82236), 73522 states have internal predecessors, (82236), 362 states have call successors, (362), 344 states have call predecessors, (362), 1838 states have return successors, (8842), 361 states have call predecessors, (8842), 361 states have call successors, (8842) [2023-04-01 20:31:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74228 states to 74228 states and 91440 transitions. [2023-04-01 20:31:25,638 INFO L78 Accepts]: Start accepts. Automaton has 74228 states and 91440 transitions. Word has length 276 [2023-04-01 20:31:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:25,638 INFO L495 AbstractCegarLoop]: Abstraction has 74228 states and 91440 transitions. [2023-04-01 20:31:25,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.25) internal successors, (351), 10 states have internal predecessors, (351), 4 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 20:31:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 74228 states and 91440 transitions. [2023-04-01 20:31:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2023-04-01 20:31:25,942 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:25,942 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:31:25,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:31:26,150 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 20:31:26,151 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:26,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:26,151 INFO L85 PathProgramCache]: Analyzing trace with hash 492759931, now seen corresponding path program 1 times [2023-04-01 20:31:26,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:26,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59977942] [2023-04-01 20:31:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:26,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:27,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:27,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:27,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:31:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:31:27,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:27,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59977942] [2023-04-01 20:31:27,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59977942] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:27,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594110370] [2023-04-01 20:31:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:27,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:27,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:27,611 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 20:31:27,614 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 20:31:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:27,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 20:31:27,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:31:28,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:31:28,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594110370] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:28,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:31:28,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 20:31:28,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359824715] [2023-04-01 20:31:28,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:28,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:31:28,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:28,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:31:28,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:31:28,093 INFO L87 Difference]: Start difference. First operand 74228 states and 91440 transitions. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 4 states have internal predecessors, (339), 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 20:31:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:30,619 INFO L93 Difference]: Finished difference Result 189080 states and 239722 transitions. [2023-04-01 20:31:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:31:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 4 states have internal predecessors, (339), 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 363 [2023-04-01 20:31:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:31,189 INFO L225 Difference]: With dead ends: 189080 [2023-04-01 20:31:31,189 INFO L226 Difference]: Without dead ends: 124119 [2023-04-01 20:31:31,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:31:31,266 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 699 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:31,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 689 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:31:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124119 states. [2023-04-01 20:31:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124119 to 122833. [2023-04-01 20:31:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122833 states, 119252 states have (on average 1.1387649683024184) internal successors, (135800), 121677 states have internal predecessors, (135800), 587 states have call successors, (587), 569 states have call predecessors, (587), 2993 states have return successors, (15008), 586 states have call predecessors, (15008), 586 states have call successors, (15008) [2023-04-01 20:31:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122833 states to 122833 states and 151395 transitions. [2023-04-01 20:31:34,562 INFO L78 Accepts]: Start accepts. Automaton has 122833 states and 151395 transitions. Word has length 363 [2023-04-01 20:31:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:34,562 INFO L495 AbstractCegarLoop]: Abstraction has 122833 states and 151395 transitions. [2023-04-01 20:31:34,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 4 states have internal predecessors, (339), 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 20:31:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 122833 states and 151395 transitions. [2023-04-01 20:31:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-04-01 20:31:34,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:34,711 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:31:34,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 20:31:34,918 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 20:31:34,919 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:34,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:34,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1971818582, now seen corresponding path program 1 times [2023-04-01 20:31:34,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:34,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040693143] [2023-04-01 20:31:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:34,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:36,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:36,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:36,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 20:31:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:36,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 20:31:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 20:31:36,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:36,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040693143] [2023-04-01 20:31:36,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040693143] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:36,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102764733] [2023-04-01 20:31:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:36,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:36,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:36,289 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 20:31:36,291 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 20:31:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:36,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:31:36,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2023-04-01 20:31:36,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:31:36,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102764733] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:36,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:31:36,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:31:36,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147157474] [2023-04-01 20:31:36,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:36,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:31:36,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:36,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:31:36,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:31:36,644 INFO L87 Difference]: Start difference. First operand 122833 states and 151395 transitions. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 4 states have internal predecessors, (224), 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 20:31:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:39,703 INFO L93 Difference]: Finished difference Result 270445 states and 336564 transitions. [2023-04-01 20:31:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:31:39,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 4 states have internal predecessors, (224), 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 377 [2023-04-01 20:31:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:40,195 INFO L225 Difference]: With dead ends: 270445 [2023-04-01 20:31:40,195 INFO L226 Difference]: Without dead ends: 147666 [2023-04-01 20:31:40,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:31:40,288 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 692 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:40,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 108 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:31:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147666 states. [2023-04-01 20:31:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147666 to 147367. [2023-04-01 20:31:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147367 states, 143486 states have (on average 1.1101919351016825) internal successors, (159297), 145977 states have internal predecessors, (159297), 703 states have call successors, (703), 687 states have call predecessors, (703), 3177 states have return successors, (14824), 702 states have call predecessors, (14824), 702 states have call successors, (14824) [2023-04-01 20:31:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147367 states to 147367 states and 174824 transitions. [2023-04-01 20:31:44,010 INFO L78 Accepts]: Start accepts. Automaton has 147367 states and 174824 transitions. Word has length 377 [2023-04-01 20:31:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:44,011 INFO L495 AbstractCegarLoop]: Abstraction has 147367 states and 174824 transitions. [2023-04-01 20:31:44,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 4 states have internal predecessors, (224), 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 20:31:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 147367 states and 174824 transitions. [2023-04-01 20:31:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-04-01 20:31:44,121 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:44,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:31:44,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 20:31:44,322 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 20:31:44,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:44,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1672020071, now seen corresponding path program 1 times [2023-04-01 20:31:44,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:44,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493477340] [2023-04-01 20:31:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:44,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:44,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:45,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:45,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 20:31:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 230 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 20:31:45,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:45,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493477340] [2023-04-01 20:31:45,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493477340] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:45,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566614513] [2023-04-01 20:31:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:45,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:45,167 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 20:31:45,168 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 20:31:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:45,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:31:45,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 20:31:45,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:31:45,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566614513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:31:45,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:31:45,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 20:31:45,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201952327] [2023-04-01 20:31:45,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:31:45,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:31:45,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:45,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:31:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 20:31:45,615 INFO L87 Difference]: Start difference. First operand 147367 states and 174824 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 20:31:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:31:48,189 INFO L93 Difference]: Finished difference Result 290192 states and 344237 transitions. [2023-04-01 20:31:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:31:48,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 437 [2023-04-01 20:31:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:31:48,752 INFO L225 Difference]: With dead ends: 290192 [2023-04-01 20:31:48,752 INFO L226 Difference]: Without dead ends: 146554 [2023-04-01 20:31:48,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 20:31:48,843 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 68 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:31:48,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 312 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:31:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146554 states. [2023-04-01 20:31:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146554 to 146501. [2023-04-01 20:31:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146501 states, 142647 states have (on average 1.1050986000406597) internal successors, (157639), 145119 states have internal predecessors, (157639), 699 states have call successors, (699), 683 states have call predecessors, (699), 3154 states have return successors, (14086), 698 states have call predecessors, (14086), 698 states have call successors, (14086) [2023-04-01 20:31:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146501 states to 146501 states and 172424 transitions. [2023-04-01 20:31:52,183 INFO L78 Accepts]: Start accepts. Automaton has 146501 states and 172424 transitions. Word has length 437 [2023-04-01 20:31:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:31:52,184 INFO L495 AbstractCegarLoop]: Abstraction has 146501 states and 172424 transitions. [2023-04-01 20:31:52,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 20:31:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 146501 states and 172424 transitions. [2023-04-01 20:31:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-04-01 20:31:52,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:31:52,313 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:31:52,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 20:31:52,514 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 20:31:52,514 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:31:52,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:31:52,515 INFO L85 PathProgramCache]: Analyzing trace with hash -624099370, now seen corresponding path program 1 times [2023-04-01 20:31:52,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:31:52,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295772831] [2023-04-01 20:31:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:52,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:31:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:31:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:31:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:31:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-04-01 20:31:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-04-01 20:31:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2023-04-01 20:31:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-04-01 20:31:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 287 proven. 171 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-04-01 20:31:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:31:54,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295772831] [2023-04-01 20:31:54,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295772831] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:31:54,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172195069] [2023-04-01 20:31:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:31:54,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:31:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:31:54,573 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 20:31:54,580 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 20:31:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:31:54,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 1954 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:31:54,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:31:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 347 proven. 4 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-04-01 20:31:55,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:31:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 362 proven. 33 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-04-01 20:31:55,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172195069] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:31:55,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:31:55,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2023-04-01 20:31:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536734093] [2023-04-01 20:31:55,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:31:55,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 20:31:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:31:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 20:31:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-04-01 20:31:55,229 INFO L87 Difference]: Start difference. First operand 146501 states and 172424 transitions. Second operand has 19 states, 19 states have (on average 25.94736842105263) internal successors, (493), 17 states have internal predecessors, (493), 6 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 20:32:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:32:22,393 INFO L93 Difference]: Finished difference Result 685425 states and 878374 transitions. [2023-04-01 20:32:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-04-01 20:32:22,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 25.94736842105263) internal successors, (493), 17 states have internal predecessors, (493), 6 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 481 [2023-04-01 20:32:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:32:25,476 INFO L225 Difference]: With dead ends: 685425 [2023-04-01 20:32:25,477 INFO L226 Difference]: Without dead ends: 546461 [2023-04-01 20:32:26,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1059 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5845 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2280, Invalid=13976, Unknown=0, NotChecked=0, Total=16256 [2023-04-01 20:32:26,032 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 10544 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 11554 mSolverCounterSat, 1288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10544 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 12842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1288 IncrementalHoareTripleChecker+Valid, 11554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:32:26,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10544 Valid, 771 Invalid, 12842 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1288 Valid, 11554 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-04-01 20:32:26,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546461 states. [2023-04-01 20:32:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546461 to 538473. [2023-04-01 20:32:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538473 states, 522414 states have (on average 1.092832504488777) internal successors, (570911), 531594 states have internal predecessors, (570911), 4409 states have call successors, (4409), 2470 states have call predecessors, (4409), 11649 states have return successors, (87612), 4408 states have call predecessors, (87612), 4408 states have call successors, (87612) [2023-04-01 20:32:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538473 states to 538473 states and 662932 transitions. [2023-04-01 20:32:46,005 INFO L78 Accepts]: Start accepts. Automaton has 538473 states and 662932 transitions. Word has length 481 [2023-04-01 20:32:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:32:46,005 INFO L495 AbstractCegarLoop]: Abstraction has 538473 states and 662932 transitions. [2023-04-01 20:32:46,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 25.94736842105263) internal successors, (493), 17 states have internal predecessors, (493), 6 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 20:32:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 538473 states and 662932 transitions. [2023-04-01 20:32:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-04-01 20:32:46,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:32:46,531 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:32:46,541 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 20:32:46,741 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 20:32:46,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:32:46,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:32:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1543813281, now seen corresponding path program 1 times [2023-04-01 20:32:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:32:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594542790] [2023-04-01 20:32:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:32:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:32:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:47,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:32:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:47,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:32:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:47,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:32:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:47,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-04-01 20:32:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:47,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 20:32:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:47,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-04-01 20:32:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:47,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-04-01 20:32:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:47,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2023-04-01 20:32:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 331 proven. 22 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-04-01 20:32:47,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:32:47,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594542790] [2023-04-01 20:32:47,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594542790] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:32:47,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322119608] [2023-04-01 20:32:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:32:47,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:32:47,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:32:47,983 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 20:32:47,985 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 20:32:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:32:48,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:32:48,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:32:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-04-01 20:32:48,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:32:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 333 proven. 26 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-04-01 20:32:48,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322119608] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:32:48,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:32:48,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-04-01 20:32:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081017126] [2023-04-01 20:32:48,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:32:48,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:32:48,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:32:48,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:32:48,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:32:48,680 INFO L87 Difference]: Start difference. First operand 538473 states and 662932 transitions. Second operand has 8 states, 8 states have (on average 45.625) internal successors, (365), 6 states have internal predecessors, (365), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)