/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_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:23:11,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:23:11,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:23:11,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:23:11,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:23:11,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:23:11,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:23:11,174 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 20:23:11,192 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:23:11,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:23:11,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:23:11,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:23:11,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:23:11,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:23:11,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:23:11,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:23:11,195 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:23:11,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:23:11,195 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:23:11,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:23:11,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:23:11,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:23:11,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:23:11,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:23:11,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:23:11,196 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:23:11,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:23:11,196 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:23:11,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:23:11,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:23:11,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:23:11,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:23:11,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:23:11,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:23:11,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:23:11,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:23:11,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:23:11,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:23:11,198 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:23:11,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:23:11,198 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:23:11,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:23:11,198 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:23:11,198 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:23:11,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:23:11,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:23:11,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:23:11,417 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:23:11,417 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:23:11,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label09.c [2023-04-01 20:23:12,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:23:12,966 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:23:12,966 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label09.c [2023-04-01 20:23:12,982 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e539baf63/bb6beda1dce3438795b02fba3a9ff135/FLAGe11772d80 [2023-04-01 20:23:12,997 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e539baf63/bb6beda1dce3438795b02fba3a9ff135 [2023-04-01 20:23:13,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:23:13,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:23:13,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:23:13,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:23:13,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:23:13,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:23:12" (1/1) ... [2023-04-01 20:23:13,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6150a55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13, skipping insertion in model container [2023-04-01 20:23:13,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:23:12" (1/1) ... [2023-04-01 20:23:13,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:23:13,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:23:13,534 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_label09.c[54191,54204] [2023-04-01 20:23:13,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:23:13,587 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:23:13,776 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_label09.c[54191,54204] [2023-04-01 20:23:13,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:23:13,807 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:23:13,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13 WrapperNode [2023-04-01 20:23:13,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:23:13,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:23:13,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:23:13,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:23:13,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (1/1) ... [2023-04-01 20:23:13,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (1/1) ... [2023-04-01 20:23:13,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (1/1) ... [2023-04-01 20:23:13,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (1/1) ... [2023-04-01 20:23:13,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (1/1) ... [2023-04-01 20:23:13,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (1/1) ... [2023-04-01 20:23:13,946 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (1/1) ... [2023-04-01 20:23:13,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (1/1) ... [2023-04-01 20:23:13,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:23:13,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:23:13,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:23:13,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:23:13,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (1/1) ... [2023-04-01 20:23:13,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:23:13,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:14,002 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 20:23:14,028 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 20:23:14,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:23:14,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:23:14,046 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:23:14,046 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:23:14,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:23:14,046 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:23:14,047 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:23:14,047 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:23:14,047 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:23:14,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:23:14,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:23:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:23:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:23:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:23:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:23:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:23:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:23:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:23:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:23:14,129 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:23:14,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:23:15,746 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:23:15,761 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:23:15,761 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:23:15,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:23:15 BoogieIcfgContainer [2023-04-01 20:23:15,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:23:15,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:23:15,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:23:15,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:23:15,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:23:12" (1/3) ... [2023-04-01 20:23:15,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d15d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:23:15, skipping insertion in model container [2023-04-01 20:23:15,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:13" (2/3) ... [2023-04-01 20:23:15,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d15d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:23:15, skipping insertion in model container [2023-04-01 20:23:15,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:23:15" (3/3) ... [2023-04-01 20:23:15,776 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label09.c [2023-04-01 20:23:15,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:23:15,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:23:15,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:23:15,869 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;@1c2803d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:23:15,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:23:15,876 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 20:23:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-01 20:23:15,891 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:15,892 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] [2023-04-01 20:23:15,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:15,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1548041342, now seen corresponding path program 1 times [2023-04-01 20:23:15,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:15,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078990895] [2023-04-01 20:23:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:15,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:17,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:17,107 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 20:23:17,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:17,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078990895] [2023-04-01 20:23:17,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078990895] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:17,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:23:17,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:23:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789258627] [2023-04-01 20:23:17,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:17,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:23:17,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:23:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:23:17,168 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 50.0) internal successors, (150), 2 states have internal predecessors, (150), 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 20:23:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:19,160 INFO L93 Difference]: Finished difference Result 839 states and 1485 transitions. [2023-04-01 20:23:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:23:19,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 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 154 [2023-04-01 20:23:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:19,175 INFO L225 Difference]: With dead ends: 839 [2023-04-01 20:23:19,175 INFO L226 Difference]: Without dead ends: 464 [2023-04-01 20:23:19,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:23:19,184 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 630 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:19,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 53 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 20:23:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-04-01 20:23:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 460. [2023-04-01 20:23:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 450 states have (on average 1.4222222222222223) internal successors, (640), 452 states have internal predecessors, (640), 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 20:23:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 651 transitions. [2023-04-01 20:23:19,248 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 651 transitions. Word has length 154 [2023-04-01 20:23:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:19,249 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 651 transitions. [2023-04-01 20:23:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 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 20:23:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 651 transitions. [2023-04-01 20:23:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-04-01 20:23:19,253 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:19,253 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] [2023-04-01 20:23:19,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:23:19,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:19,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:19,254 INFO L85 PathProgramCache]: Analyzing trace with hash -7177887, now seen corresponding path program 1 times [2023-04-01 20:23:19,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:19,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555649405] [2023-04-01 20:23:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:19,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:19,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:19,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:19,887 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 20:23:19,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:19,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555649405] [2023-04-01 20:23:19,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555649405] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:19,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:23:19,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:23:19,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475998476] [2023-04-01 20:23:19,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:19,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:23:19,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:23:19,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:23:19,893 INFO L87 Difference]: Start difference. First operand 460 states and 651 transitions. Second operand has 7 states, 6 states have (on average 26.666666666666668) internal successors, (160), 4 states have internal predecessors, (160), 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 20:23:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:21,805 INFO L93 Difference]: Finished difference Result 1392 states and 2002 transitions. [2023-04-01 20:23:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:23:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 26.666666666666668) internal successors, (160), 4 states have internal predecessors, (160), 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 166 [2023-04-01 20:23:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:21,814 INFO L225 Difference]: With dead ends: 1392 [2023-04-01 20:23:21,814 INFO L226 Difference]: Without dead ends: 938 [2023-04-01 20:23:21,820 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 20:23:21,824 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1220 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:21,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 142 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 20:23:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2023-04-01 20:23:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 916. [2023-04-01 20:23:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 896 states have (on average 1.3895089285714286) internal successors, (1245), 904 states have internal predecessors, (1245), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-04-01 20:23:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1278 transitions. [2023-04-01 20:23:21,893 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1278 transitions. Word has length 166 [2023-04-01 20:23:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:21,893 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1278 transitions. [2023-04-01 20:23:21,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 26.666666666666668) internal successors, (160), 4 states have internal predecessors, (160), 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 20:23:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1278 transitions. [2023-04-01 20:23:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-01 20:23:21,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:21,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-04-01 20:23:21,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:23:21,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:21,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash 956410842, now seen corresponding path program 1 times [2023-04-01 20:23:21,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:21,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645172335] [2023-04-01 20:23:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:22,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:22,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:22,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:23:22,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:22,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645172335] [2023-04-01 20:23:22,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645172335] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:22,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508413980] [2023-04-01 20:23:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:22,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:22,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:22,807 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 20:23:22,809 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 20:23:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:23,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:23:23,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:23:23,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:23,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508413980] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:23,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:23,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:23:23,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744705547] [2023-04-01 20:23:23,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:23,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:23,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:23,246 INFO L87 Difference]: Start difference. First operand 916 states and 1278 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 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 20:23:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:23,633 INFO L93 Difference]: Finished difference Result 2778 states and 3941 transitions. [2023-04-01 20:23:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:23,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 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 184 [2023-04-01 20:23:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:23,644 INFO L225 Difference]: With dead ends: 2778 [2023-04-01 20:23:23,645 INFO L226 Difference]: Without dead ends: 1868 [2023-04-01 20:23:23,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:23,650 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1079 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:23,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 926 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:23:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2023-04-01 20:23:23,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1847. [2023-04-01 20:23:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1800 states have (on average 1.386111111111111) internal successors, (2495), 1827 states have internal predecessors, (2495), 10 states have call successors, (10), 10 states have call predecessors, (10), 36 states have return successors, (91), 9 states have call predecessors, (91), 9 states have call successors, (91) [2023-04-01 20:23:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2596 transitions. [2023-04-01 20:23:23,746 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2596 transitions. Word has length 184 [2023-04-01 20:23:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:23,746 INFO L495 AbstractCegarLoop]: Abstraction has 1847 states and 2596 transitions. [2023-04-01 20:23:23,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 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 20:23:23,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2596 transitions. [2023-04-01 20:23:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 20:23:23,753 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:23,753 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:23,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 20:23:23,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:23,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:23,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:23,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1012017482, now seen corresponding path program 1 times [2023-04-01 20:23:23,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:23,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394018946] [2023-04-01 20:23:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:23,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:24,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:24,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:24,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:23:24,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:24,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394018946] [2023-04-01 20:23:24,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394018946] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:24,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929919566] [2023-04-01 20:23:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:24,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:24,680 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 20:23:24,687 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 20:23:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:24,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:23:24,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 20:23:25,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:25,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929919566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:25,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:25,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:23:25,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012264421] [2023-04-01 20:23:25,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:25,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:23:25,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:25,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:23:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:23:25,133 INFO L87 Difference]: Start difference. First operand 1847 states and 2596 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 20:23:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:25,961 INFO L93 Difference]: Finished difference Result 5449 states and 7807 transitions. [2023-04-01 20:23:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:23:25,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 192 [2023-04-01 20:23:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:25,976 INFO L225 Difference]: With dead ends: 5449 [2023-04-01 20:23:25,976 INFO L226 Difference]: Without dead ends: 3608 [2023-04-01 20:23:25,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:23:25,982 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 100 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:25,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 263 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:23:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2023-04-01 20:23:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3556. [2023-04-01 20:23:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3473 states have (on average 1.3717247336596603) internal successors, (4764), 3520 states have internal predecessors, (4764), 18 states have call successors, (18), 18 states have call predecessors, (18), 64 states have return successors, (263), 17 states have call predecessors, (263), 17 states have call successors, (263) [2023-04-01 20:23:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 5045 transitions. [2023-04-01 20:23:26,118 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 5045 transitions. Word has length 192 [2023-04-01 20:23:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:26,119 INFO L495 AbstractCegarLoop]: Abstraction has 3556 states and 5045 transitions. [2023-04-01 20:23:26,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 20:23:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 5045 transitions. [2023-04-01 20:23:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-04-01 20:23:26,128 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:26,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:23:26,144 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 20:23:26,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 20:23:26,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:26,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -26876983, now seen corresponding path program 1 times [2023-04-01 20:23:26,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:26,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225131359] [2023-04-01 20:23:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:26,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:26,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:26,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:26,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:23:26,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:26,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225131359] [2023-04-01 20:23:26,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225131359] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:26,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825928660] [2023-04-01 20:23:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:26,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:26,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:26,844 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 20:23:26,847 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 20:23:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:27,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:23:27,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:23:27,232 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:27,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825928660] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:27,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:27,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:23:27,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650049709] [2023-04-01 20:23:27,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:27,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:27,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:27,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:27,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:27,234 INFO L87 Difference]: Start difference. First operand 3556 states and 5045 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 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 20:23:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:27,665 INFO L93 Difference]: Finished difference Result 10765 states and 15770 transitions. [2023-04-01 20:23:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 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 193 [2023-04-01 20:23:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:27,705 INFO L225 Difference]: With dead ends: 10765 [2023-04-01 20:23:27,706 INFO L226 Difference]: Without dead ends: 7215 [2023-04-01 20:23:27,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 195 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 20:23:27,718 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 1098 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:27,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 950 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:23:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7215 states. [2023-04-01 20:23:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7215 to 7141. [2023-04-01 20:23:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7141 states, 6959 states have (on average 1.3675815490731427) internal successors, (9517), 7073 states have internal predecessors, (9517), 34 states have call successors, (34), 34 states have call predecessors, (34), 147 states have return successors, (693), 33 states have call predecessors, (693), 33 states have call successors, (693) [2023-04-01 20:23:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7141 states to 7141 states and 10244 transitions. [2023-04-01 20:23:28,080 INFO L78 Accepts]: Start accepts. Automaton has 7141 states and 10244 transitions. Word has length 193 [2023-04-01 20:23:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:28,081 INFO L495 AbstractCegarLoop]: Abstraction has 7141 states and 10244 transitions. [2023-04-01 20:23:28,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 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 20:23:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 7141 states and 10244 transitions. [2023-04-01 20:23:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-01 20:23:28,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:28,096 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:28,105 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 20:23:28,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:28,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:28,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash 712052657, now seen corresponding path program 1 times [2023-04-01 20:23:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140205237] [2023-04-01 20:23:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:28,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:23:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 20:23:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 20:23:29,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:29,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140205237] [2023-04-01 20:23:29,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140205237] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:29,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666339672] [2023-04-01 20:23:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:29,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:29,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:29,003 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 20:23:29,006 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 20:23:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:29,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:23:29,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 20:23:29,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:29,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666339672] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:29,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:29,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 20:23:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196607977] [2023-04-01 20:23:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:29,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:29,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:29,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:29,324 INFO L87 Difference]: Start difference. First operand 7141 states and 10244 transitions. Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 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 20:23:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:30,739 INFO L93 Difference]: Finished difference Result 21556 states and 32186 transitions. [2023-04-01 20:23:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:23:30,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 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 200 [2023-04-01 20:23:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:30,820 INFO L225 Difference]: With dead ends: 21556 [2023-04-01 20:23:30,820 INFO L226 Difference]: Without dead ends: 14421 [2023-04-01 20:23:30,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:23:30,843 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 813 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:30,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 179 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 20:23:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14421 states. [2023-04-01 20:23:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14421 to 14325. [2023-04-01 20:23:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14325 states, 13843 states have (on average 1.3113486960918876) internal successors, (18153), 14193 states have internal predecessors, (18153), 66 states have call successors, (66), 66 states have call predecessors, (66), 415 states have return successors, (1985), 65 states have call predecessors, (1985), 65 states have call successors, (1985) [2023-04-01 20:23:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14325 states to 14325 states and 20204 transitions. [2023-04-01 20:23:31,371 INFO L78 Accepts]: Start accepts. Automaton has 14325 states and 20204 transitions. Word has length 200 [2023-04-01 20:23:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:31,371 INFO L495 AbstractCegarLoop]: Abstraction has 14325 states and 20204 transitions. [2023-04-01 20:23:31,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 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 20:23:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 14325 states and 20204 transitions. [2023-04-01 20:23:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-01 20:23:31,408 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:31,409 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:31,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:31,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:31,617 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:31,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1169860701, now seen corresponding path program 2 times [2023-04-01 20:23:31,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:31,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656786697] [2023-04-01 20:23:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:32,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:32,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:32,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:32,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 20:23:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:23:32,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:32,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656786697] [2023-04-01 20:23:32,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656786697] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:32,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79572307] [2023-04-01 20:23:32,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:23:32,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:32,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:32,374 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 20:23:32,401 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 20:23:32,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:23:32,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:23:32,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:23:32,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 58 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:23:32,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:23:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:23:32,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79572307] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:23:32,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:23:32,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:23:32,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98706817] [2023-04-01 20:23:32,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:23:32,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:23:32,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:32,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:23:32,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:23:32,847 INFO L87 Difference]: Start difference. First operand 14325 states and 20204 transitions. Second operand has 12 states, 12 states have (on average 18.5) internal successors, (222), 10 states have internal predecessors, (222), 5 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 20:23:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:40,808 INFO L93 Difference]: Finished difference Result 48729 states and 84848 transitions. [2023-04-01 20:23:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-04-01 20:23:40,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.5) internal successors, (222), 10 states have internal predecessors, (222), 5 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 200 [2023-04-01 20:23:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:40,989 INFO L225 Difference]: With dead ends: 48729 [2023-04-01 20:23:40,989 INFO L226 Difference]: Without dead ends: 34410 [2023-04-01 20:23:41,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 455 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=821, Invalid=4149, Unknown=0, NotChecked=0, Total=4970 [2023-04-01 20:23:41,044 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2498 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 5094 mSolverCounterSat, 1225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 6319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1225 IncrementalHoareTripleChecker+Valid, 5094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:41,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2509 Valid, 328 Invalid, 6319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1225 Valid, 5094 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-04-01 20:23:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34410 states. [2023-04-01 20:23:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34410 to 33236. [2023-04-01 20:23:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33236 states, 31855 states have (on average 1.2180819337623607) internal successors, (38802), 32935 states have internal predecessors, (38802), 151 states have call successors, (151), 150 states have call predecessors, (151), 1229 states have return successors, (5597), 150 states have call predecessors, (5597), 150 states have call successors, (5597) [2023-04-01 20:23:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33236 states to 33236 states and 44550 transitions. [2023-04-01 20:23:42,295 INFO L78 Accepts]: Start accepts. Automaton has 33236 states and 44550 transitions. Word has length 200 [2023-04-01 20:23:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:42,295 INFO L495 AbstractCegarLoop]: Abstraction has 33236 states and 44550 transitions. [2023-04-01 20:23:42,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.5) internal successors, (222), 10 states have internal predecessors, (222), 5 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 20:23:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 33236 states and 44550 transitions. [2023-04-01 20:23:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-01 20:23:42,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:42,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:23:42,344 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 20:23:42,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:42,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:42,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1886587058, now seen corresponding path program 1 times [2023-04-01 20:23:42,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:42,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460769672] [2023-04-01 20:23:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:42,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:43,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:43,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:43,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:23:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:23:43,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:43,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460769672] [2023-04-01 20:23:43,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460769672] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:43,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073686246] [2023-04-01 20:23:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:43,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:43,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:43,913 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 20:23:43,937 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 20:23:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:44,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:23:44,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:23:44,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:44,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073686246] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:44,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:44,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-04-01 20:23:44,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243374622] [2023-04-01 20:23:44,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:44,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:23:44,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:23:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:44,313 INFO L87 Difference]: Start difference. First operand 33236 states and 44550 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 20:23:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:45,767 INFO L93 Difference]: Finished difference Result 91996 states and 125346 transitions. [2023-04-01 20:23:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:23:45,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 200 [2023-04-01 20:23:45,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:45,976 INFO L225 Difference]: With dead ends: 91996 [2023-04-01 20:23:45,976 INFO L226 Difference]: Without dead ends: 58770 [2023-04-01 20:23:46,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:46,035 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 102 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:46,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 440 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:23:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58770 states. [2023-04-01 20:23:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58770 to 57064. [2023-04-01 20:23:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57064 states, 55257 states have (on average 1.1842119550464194) internal successors, (65436), 56537 states have internal predecessors, (65436), 264 states have call successors, (264), 263 states have call predecessors, (264), 1542 states have return successors, (9278), 263 states have call predecessors, (9278), 263 states have call successors, (9278) [2023-04-01 20:23:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57064 states to 57064 states and 74978 transitions. [2023-04-01 20:23:47,859 INFO L78 Accepts]: Start accepts. Automaton has 57064 states and 74978 transitions. Word has length 200 [2023-04-01 20:23:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:47,862 INFO L495 AbstractCegarLoop]: Abstraction has 57064 states and 74978 transitions. [2023-04-01 20:23:47,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 20:23:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 57064 states and 74978 transitions. [2023-04-01 20:23:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-04-01 20:23:47,957 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:47,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:47,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:48,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:48,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:48,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:48,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1607010717, now seen corresponding path program 1 times [2023-04-01 20:23:48,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:48,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273380377] [2023-04-01 20:23:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:48,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:49,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:49,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:49,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:23:49,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273380377] [2023-04-01 20:23:49,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273380377] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:49,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496997806] [2023-04-01 20:23:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:49,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:49,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:49,345 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 20:23:49,365 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 20:23:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:49,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:23:49,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:23:49,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496997806] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:49,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:49,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 20:23:49,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512880273] [2023-04-01 20:23:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:23:49,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:23:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:49,754 INFO L87 Difference]: Start difference. First operand 57064 states and 74978 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 20:23:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:51,420 INFO L93 Difference]: Finished difference Result 141660 states and 188743 transitions. [2023-04-01 20:23:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:23:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 252 [2023-04-01 20:23:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:51,802 INFO L225 Difference]: With dead ends: 141660 [2023-04-01 20:23:51,803 INFO L226 Difference]: Without dead ends: 85269 [2023-04-01 20:23:51,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:51,884 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 126 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:51,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 195 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:23:51,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85269 states. [2023-04-01 20:23:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85269 to 84291. [2023-04-01 20:23:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84291 states, 81925 states have (on average 1.1746475434848946) internal successors, (96233), 83508 states have internal predecessors, (96233), 392 states have call successors, (392), 391 states have call predecessors, (392), 1973 states have return successors, (13027), 391 states have call predecessors, (13027), 391 states have call successors, (13027) [2023-04-01 20:23:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84291 states to 84291 states and 109652 transitions. [2023-04-01 20:23:54,462 INFO L78 Accepts]: Start accepts. Automaton has 84291 states and 109652 transitions. Word has length 252 [2023-04-01 20:23:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:54,462 INFO L495 AbstractCegarLoop]: Abstraction has 84291 states and 109652 transitions. [2023-04-01 20:23:54,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 20:23:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 84291 states and 109652 transitions. [2023-04-01 20:23:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-04-01 20:23:54,579 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:54,580 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:54,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:54,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:54,788 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:54,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1571794016, now seen corresponding path program 1 times [2023-04-01 20:23:54,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:54,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890797722] [2023-04-01 20:23:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:54,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:55,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:55,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:55,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:55,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 20:23:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:55,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-04-01 20:23:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 129 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 20:23:55,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:55,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890797722] [2023-04-01 20:23:55,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890797722] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:55,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236041318] [2023-04-01 20:23:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:55,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:55,800 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 20:23:55,825 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 20:23:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:56,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:23:56,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-04-01 20:23:56,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:23:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 133 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 20:23:56,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236041318] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:23:56,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:23:56,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-04-01 20:23:56,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353401280] [2023-04-01 20:23:56,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:23:56,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:23:56,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:23:56,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:23:56,202 INFO L87 Difference]: Start difference. First operand 84291 states and 109652 transitions. Second operand has 8 states, 8 states have (on average 31.375) internal successors, (251), 6 states have internal predecessors, (251), 3 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:23:58,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:58,264 INFO L93 Difference]: Finished difference Result 161647 states and 209715 transitions. [2023-04-01 20:23:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:58,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.375) internal successors, (251), 6 states have internal predecessors, (251), 3 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 278 [2023-04-01 20:23:58,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:58,502 INFO L225 Difference]: With dead ends: 161647 [2023-04-01 20:23:58,503 INFO L226 Difference]: Without dead ends: 78029 [2023-04-01 20:23:58,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:58,599 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1431 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:58,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 42 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 20:23:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78029 states. [2023-04-01 20:24:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78029 to 77921. [2023-04-01 20:24:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77921 states, 75961 states have (on average 1.1412961914666737) internal successors, (86694), 77190 states have internal predecessors, (86694), 366 states have call successors, (366), 365 states have call predecessors, (366), 1593 states have return successors, (9161), 365 states have call predecessors, (9161), 365 states have call successors, (9161) [2023-04-01 20:24:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77921 states to 77921 states and 96221 transitions. [2023-04-01 20:24:00,564 INFO L78 Accepts]: Start accepts. Automaton has 77921 states and 96221 transitions. Word has length 278 [2023-04-01 20:24:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:00,564 INFO L495 AbstractCegarLoop]: Abstraction has 77921 states and 96221 transitions. [2023-04-01 20:24:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.375) internal successors, (251), 6 states have internal predecessors, (251), 3 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:24:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 77921 states and 96221 transitions. [2023-04-01 20:24:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-04-01 20:24:00,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:00,650 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:24:00,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 20:24:00,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 20:24:00,858 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:00,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:00,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1511404169, now seen corresponding path program 1 times [2023-04-01 20:24:00,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:00,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931418064] [2023-04-01 20:24:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:01,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:01,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:01,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:24:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:02,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-04-01 20:24:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 181 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:24:02,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:02,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931418064] [2023-04-01 20:24:02,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931418064] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:02,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808032776] [2023-04-01 20:24:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:02,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:02,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:02,119 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 20:24:02,145 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 20:24:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:02,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:24:02,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:24:02,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:24:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:24:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808032776] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:24:02,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:24:02,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-04-01 20:24:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743425407] [2023-04-01 20:24:02,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:24:02,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:24:02,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:24:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:24:02,893 INFO L87 Difference]: Start difference. First operand 77921 states and 96221 transitions. Second operand has 12 states, 12 states have (on average 39.583333333333336) internal successors, (475), 10 states have internal predecessors, (475), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:24:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:10,642 INFO L93 Difference]: Finished difference Result 170743 states and 221862 transitions. [2023-04-01 20:24:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-04-01 20:24:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 39.583333333333336) internal successors, (475), 10 states have internal predecessors, (475), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 322 [2023-04-01 20:24:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:11,029 INFO L225 Difference]: With dead ends: 170743 [2023-04-01 20:24:11,029 INFO L226 Difference]: Without dead ends: 93493 [2023-04-01 20:24:11,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 688 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=682, Invalid=3224, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 20:24:11,114 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4138 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 5295 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 6256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 5295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:11,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4141 Valid, 359 Invalid, 6256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 5295 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 20:24:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93493 states. [2023-04-01 20:24:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93493 to 91397. [2023-04-01 20:24:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91397 states, 89033 states have (on average 1.1006143789381466) internal successors, (97991), 90542 states have internal predecessors, (97991), 428 states have call successors, (428), 427 states have call predecessors, (428), 1935 states have return successors, (7895), 427 states have call predecessors, (7895), 427 states have call successors, (7895) [2023-04-01 20:24:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91397 states to 91397 states and 106314 transitions. [2023-04-01 20:24:13,338 INFO L78 Accepts]: Start accepts. Automaton has 91397 states and 106314 transitions. Word has length 322 [2023-04-01 20:24:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:13,339 INFO L495 AbstractCegarLoop]: Abstraction has 91397 states and 106314 transitions. [2023-04-01 20:24:13,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 39.583333333333336) internal successors, (475), 10 states have internal predecessors, (475), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:24:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 91397 states and 106314 transitions. [2023-04-01 20:24:13,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-01 20:24:13,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:13,398 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:24:13,406 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 20:24:13,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:13,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:13,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1679628808, now seen corresponding path program 1 times [2023-04-01 20:24:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:13,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215392829] [2023-04-01 20:24:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:13,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:14,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:14,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:14,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:24:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:14,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 20:24:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:14,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-04-01 20:24:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 180 proven. 66 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 20:24:14,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215392829] [2023-04-01 20:24:14,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215392829] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665991210] [2023-04-01 20:24:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:14,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:14,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:14,757 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 20:24:14,781 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 20:24:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:15,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 20:24:15,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-01 20:24:15,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:24:15,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665991210] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:15,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:24:15,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 20:24:15,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007367927] [2023-04-01 20:24:15,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:15,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:24:15,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:24:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:24:15,176 INFO L87 Difference]: Start difference. First operand 91397 states and 106314 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:24:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:16,586 INFO L93 Difference]: Finished difference Result 181245 states and 210861 transitions. [2023-04-01 20:24:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:24:16,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 324 [2023-04-01 20:24:16,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:16,806 INFO L225 Difference]: With dead ends: 181245 [2023-04-01 20:24:16,807 INFO L226 Difference]: Without dead ends: 91373 [2023-04-01 20:24:17,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:24:17,056 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 276 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:17,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 38 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:24:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91373 states. [2023-04-01 20:24:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91373 to 91373. [2023-04-01 20:24:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91373 states, 89017 states have (on average 1.1005425929878563) internal successors, (97967), 90518 states have internal predecessors, (97967), 428 states have call successors, (428), 427 states have call predecessors, (428), 1927 states have return successors, (7861), 427 states have call predecessors, (7861), 427 states have call successors, (7861) [2023-04-01 20:24:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91373 states to 91373 states and 106256 transitions. [2023-04-01 20:24:18,955 INFO L78 Accepts]: Start accepts. Automaton has 91373 states and 106256 transitions. Word has length 324 [2023-04-01 20:24:18,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:18,955 INFO L495 AbstractCegarLoop]: Abstraction has 91373 states and 106256 transitions. [2023-04-01 20:24:18,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:24:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 91373 states and 106256 transitions. [2023-04-01 20:24:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-04-01 20:24:19,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:19,000 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2023-04-01 20:24:19,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 20:24:19,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 20:24:19,201 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:19,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1635368630, now seen corresponding path program 1 times [2023-04-01 20:24:19,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:19,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985670172] [2023-04-01 20:24:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:19,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:24:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 20:24:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 20:24:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 191 proven. 77 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-01 20:24:20,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:20,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985670172] [2023-04-01 20:24:20,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985670172] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:20,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404214479] [2023-04-01 20:24:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:20,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:20,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:20,457 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:24:20,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 20:24:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:24:20,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-04-01 20:24:20,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:24:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 192 proven. 79 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 20:24:21,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404214479] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:24:21,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:24:21,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2023-04-01 20:24:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043895730] [2023-04-01 20:24:21,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:24:21,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:24:21,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:21,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:24:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:24:21,052 INFO L87 Difference]: Start difference. First operand 91373 states and 106256 transitions. Second operand has 13 states, 13 states have (on average 34.15384615384615) internal successors, (444), 11 states have internal predecessors, (444), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:24:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:29,792 INFO L93 Difference]: Finished difference Result 178532 states and 221015 transitions. [2023-04-01 20:24:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-04-01 20:24:29,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 34.15384615384615) internal successors, (444), 11 states have internal predecessors, (444), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 333 [2023-04-01 20:24:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:30,027 INFO L225 Difference]: With dead ends: 178532 [2023-04-01 20:24:30,027 INFO L226 Difference]: Without dead ends: 79563 [2023-04-01 20:24:30,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 724 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=3531, Unknown=0, NotChecked=0, Total=4290 [2023-04-01 20:24:30,114 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3006 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 7978 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3006 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 8780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 7978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:30,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3006 Valid, 346 Invalid, 8780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 7978 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-04-01 20:24:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79563 states. [2023-04-01 20:24:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79563 to 73332. [2023-04-01 20:24:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73332 states, 71791 states have (on average 1.04401665946985) internal successors, (74951), 72636 states have internal predecessors, (74951), 349 states have call successors, (349), 347 states have call predecessors, (349), 1191 states have return successors, (3305), 348 states have call predecessors, (3305), 348 states have call successors, (3305) [2023-04-01 20:24:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73332 states to 73332 states and 78605 transitions. [2023-04-01 20:24:31,721 INFO L78 Accepts]: Start accepts. Automaton has 73332 states and 78605 transitions. Word has length 333 [2023-04-01 20:24:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:31,721 INFO L495 AbstractCegarLoop]: Abstraction has 73332 states and 78605 transitions. [2023-04-01 20:24:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 34.15384615384615) internal successors, (444), 11 states have internal predecessors, (444), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:24:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 73332 states and 78605 transitions. [2023-04-01 20:24:31,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2023-04-01 20:24:31,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:31,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:24:31,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 20:24:31,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 20:24:31,946 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:31,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash -408385615, now seen corresponding path program 1 times [2023-04-01 20:24:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:31,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748574409] [2023-04-01 20:24:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:32,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:33,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:33,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-04-01 20:24:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:33,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-04-01 20:24:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 192 proven. 127 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:24:33,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:33,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748574409] [2023-04-01 20:24:33,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748574409] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:33,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674464474] [2023-04-01 20:24:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:33,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:33,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:24:33,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 20:24:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:33,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:24:33,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 20:24:33,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:24:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 20:24:33,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674464474] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:24:33,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:24:33,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2023-04-01 20:24:33,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137506913] [2023-04-01 20:24:33,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:24:33,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 20:24:33,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 20:24:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-04-01 20:24:33,908 INFO L87 Difference]: Start difference. First operand 73332 states and 78605 transitions. Second operand has 16 states, 16 states have (on average 33.0) internal successors, (528), 14 states have internal predecessors, (528), 6 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 20:24:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:50,773 INFO L93 Difference]: Finished difference Result 324550 states and 366947 transitions. [2023-04-01 20:24:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-04-01 20:24:50,774 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 33.0) internal successors, (528), 14 states have internal predecessors, (528), 6 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 352 [2023-04-01 20:24:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:51,684 INFO L225 Difference]: With dead ends: 324550 [2023-04-01 20:24:51,684 INFO L226 Difference]: Without dead ends: 252717 [2023-04-01 20:24:51,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8303 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2527, Invalid=18353, Unknown=0, NotChecked=0, Total=20880 [2023-04-01 20:24:51,811 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 6657 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 11889 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6661 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 12294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 11889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:51,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6661 Valid, 859 Invalid, 12294 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [405 Valid, 11889 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-04-01 20:24:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252717 states. [2023-04-01 20:24:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252717 to 226387. [2023-04-01 20:24:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226387 states, 220930 states have (on average 1.0416783596614312) internal successors, (230138), 223531 states have internal predecessors, (230138), 1803 states have call successors, (1803), 1053 states have call predecessors, (1803), 3653 states have return successors, (17374), 1802 states have call predecessors, (17374), 1802 states have call successors, (17374) [2023-04-01 20:24:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226387 states to 226387 states and 249315 transitions. [2023-04-01 20:24:58,166 INFO L78 Accepts]: Start accepts. Automaton has 226387 states and 249315 transitions. Word has length 352 [2023-04-01 20:24:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:58,166 INFO L495 AbstractCegarLoop]: Abstraction has 226387 states and 249315 transitions. [2023-04-01 20:24:58,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.0) internal successors, (528), 14 states have internal predecessors, (528), 6 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 20:24:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 226387 states and 249315 transitions. [2023-04-01 20:24:58,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-01 20:24:58,233 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:58,233 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:24:58,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 20:24:58,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 20:24:58,441 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:58,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1956239987, now seen corresponding path program 1 times [2023-04-01 20:24:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:58,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857973022] [2023-04-01 20:24:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:58,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:59,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:59,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-04-01 20:24:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 202 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:24:59,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:59,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857973022] [2023-04-01 20:24:59,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857973022] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:59,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026567568] [2023-04-01 20:24:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:59,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:59,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:59,657 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:24:59,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 20:24:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:59,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 20:24:59,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:25:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-04-01 20:25:00,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:25:00,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026567568] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:25:00,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:25:00,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:25:00,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402287325] [2023-04-01 20:25:00,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:25:00,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:25:00,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:00,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:25:00,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:25:00,248 INFO L87 Difference]: Start difference. First operand 226387 states and 249315 transitions. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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 20:25:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:25:07,263 INFO L93 Difference]: Finished difference Result 493310 states and 544607 transitions. [2023-04-01 20:25:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 20:25:07,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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 362 [2023-04-01 20:25:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:25:08,773 INFO L225 Difference]: With dead ends: 493310 [2023-04-01 20:25:08,774 INFO L226 Difference]: Without dead ends: 327227 [2023-04-01 20:25:08,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:25:08,982 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 469 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:25:08,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 117 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:25:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327227 states. [2023-04-01 20:25:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327227 to 311525. [2023-04-01 20:25:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311525 states, 304077 states have (on average 1.0434297891652444) internal successors, (317283), 307622 states have internal predecessors, (317283), 2454 states have call successors, (2454), 1449 states have call predecessors, (2454), 4993 states have return successors, (24753), 2453 states have call predecessors, (24753), 2453 states have call successors, (24753) [2023-04-01 20:25:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311525 states to 311525 states and 344490 transitions. [2023-04-01 20:25:17,661 INFO L78 Accepts]: Start accepts. Automaton has 311525 states and 344490 transitions. Word has length 362 [2023-04-01 20:25:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:25:17,662 INFO L495 AbstractCegarLoop]: Abstraction has 311525 states and 344490 transitions. [2023-04-01 20:25:17,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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 20:25:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 311525 states and 344490 transitions. [2023-04-01 20:25:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-04-01 20:25:17,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:25:17,810 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:25:17,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-04-01 20:25:18,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 20:25:18,019 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:25:18,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:25:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash 632432059, now seen corresponding path program 1 times [2023-04-01 20:25:18,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:25:18,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131231237] [2023-04-01 20:25:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:18,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:25:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:19,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:25:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:19,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:25:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:19,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:25:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:19,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2023-04-01 20:25:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 222 proven. 92 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:25:19,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:25:19,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131231237] [2023-04-01 20:25:19,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131231237] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:25:19,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725000853] [2023-04-01 20:25:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:19,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:25:19,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:25:19,837 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:25:19,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 20:25:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:20,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 20:25:20,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:25:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:25:20,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:25:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:25:22,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725000853] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:25:22,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:25:22,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-04-01 20:25:22,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349251154] [2023-04-01 20:25:22,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:25:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:25:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:25:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:25:22,150 INFO L87 Difference]: Start difference. First operand 311525 states and 344490 transitions. Second operand has 15 states, 15 states have (on average 38.333333333333336) internal successors, (575), 13 states have internal predecessors, (575), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 20:25:49,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:25:49,242 INFO L93 Difference]: Finished difference Result 649404 states and 779777 transitions. [2023-04-01 20:25:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-04-01 20:25:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 38.333333333333336) internal successors, (575), 13 states have internal predecessors, (575), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 373 [2023-04-01 20:25:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:25:51,632 INFO L225 Difference]: With dead ends: 649404 [2023-04-01 20:25:51,632 INFO L226 Difference]: Without dead ends: 322162 [2023-04-01 20:25:52,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 788 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=930, Invalid=4472, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 20:25:52,367 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 4159 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 6980 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4164 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 7427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 6980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:25:52,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4164 Valid, 433 Invalid, 7427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 6980 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-04-01 20:25:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322162 states. [2023-04-01 20:26:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322162 to 294308. [2023-04-01 20:26:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294308 states, 287391 states have (on average 1.0382371055461026) internal successors, (298380), 290591 states have internal predecessors, (298380), 2347 states have call successors, (2347), 1370 states have call predecessors, (2347), 4569 states have return successors, (20965), 2346 states have call predecessors, (20965), 2346 states have call successors, (20965) [2023-04-01 20:26:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294308 states to 294308 states and 321692 transitions. [2023-04-01 20:26:02,344 INFO L78 Accepts]: Start accepts. Automaton has 294308 states and 321692 transitions. Word has length 373 [2023-04-01 20:26:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:02,345 INFO L495 AbstractCegarLoop]: Abstraction has 294308 states and 321692 transitions. [2023-04-01 20:26:02,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 38.333333333333336) internal successors, (575), 13 states have internal predecessors, (575), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 20:26:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 294308 states and 321692 transitions. [2023-04-01 20:26:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-04-01 20:26:02,406 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:02,406 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:02,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 20:26:02,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:02,607 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:02,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash 554523537, now seen corresponding path program 1 times [2023-04-01 20:26:02,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:02,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783720316] [2023-04-01 20:26:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:02,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:03,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:04,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:04,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2023-04-01 20:26:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 227 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:04,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:04,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783720316] [2023-04-01 20:26:04,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783720316] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:04,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612434757] [2023-04-01 20:26:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:04,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:04,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:04,565 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:04,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 20:26:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:04,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 20:26:04,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:05,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 230 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:06,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612434757] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:26:06,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:26:06,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-04-01 20:26:06,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847589576] [2023-04-01 20:26:06,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:26:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 20:26:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 20:26:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:26:06,054 INFO L87 Difference]: Start difference. First operand 294308 states and 321692 transitions. Second operand has 18 states, 18 states have (on average 41.55555555555556) internal successors, (748), 15 states have internal predecessors, (748), 6 states have call successors, (11), 10 states have call predecessors, (11), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7)