/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/Problem16_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:13:53,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:13:53,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:13:53,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:13:53,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:13:53,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:13:53,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:13:53,922 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 23:13:53,940 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:13:53,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:13:53,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:13:53,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:13:53,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:13:53,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:13:53,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:13:53,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:13:53,942 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:13:53,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:13:53,943 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:13:53,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:13:53,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:13:53,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:13:53,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:13:53,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:13:53,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:13:53,944 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:13:53,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:13:53,944 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:13:53,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:13:53,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:13:53,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:13:53,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:13:53,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:13:53,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:13:53,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:13:53,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:13:53,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:13:53,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:13:53,945 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:13:53,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:13:53,945 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:13:53,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:13:53,946 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:13:53,946 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:13:54,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:13:54,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:13:54,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:13:54,181 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:13:54,183 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:13:54,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label34.c [2023-04-01 23:13:55,217 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:13:55,512 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:13:55,512 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label34.c [2023-04-01 23:13:55,523 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f64e382b/c48cabe9ee4645638a17aa72d9a0c09b/FLAGf3036ff10 [2023-04-01 23:13:55,534 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f64e382b/c48cabe9ee4645638a17aa72d9a0c09b [2023-04-01 23:13:55,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:13:55,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:13:55,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:13:55,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:13:55,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:13:55,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:13:55" (1/1) ... [2023-04-01 23:13:55,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672fc97c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:55, skipping insertion in model container [2023-04-01 23:13:55,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:13:55" (1/1) ... [2023-04-01 23:13:55,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:13:55,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:13:55,765 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/Problem16_label34.c[3712,3725] [2023-04-01 23:13:55,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:13:56,008 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:13:56,019 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/Problem16_label34.c[3712,3725] [2023-04-01 23:13:56,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:13:56,179 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:13:56,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56 WrapperNode [2023-04-01 23:13:56,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:13:56,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:13:56,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:13:56,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:13:56,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (1/1) ... [2023-04-01 23:13:56,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (1/1) ... [2023-04-01 23:13:56,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (1/1) ... [2023-04-01 23:13:56,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (1/1) ... [2023-04-01 23:13:56,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (1/1) ... [2023-04-01 23:13:56,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (1/1) ... [2023-04-01 23:13:56,275 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (1/1) ... [2023-04-01 23:13:56,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (1/1) ... [2023-04-01 23:13:56,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:13:56,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:13:56,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:13:56,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:13:56,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (1/1) ... [2023-04-01 23:13:56,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:13:56,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:13:56,334 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 23:13:56,341 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 23:13:56,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:13:56,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:13:56,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:13:56,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:13:56,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:13:56,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:13:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:13:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:13:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:13:56,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:13:56,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:13:56,420 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:13:56,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:13:57,905 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:13:57,911 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:13:57,912 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:13:57,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:13:57 BoogieIcfgContainer [2023-04-01 23:13:57,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:13:57,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:13:57,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:13:57,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:13:57,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:13:55" (1/3) ... [2023-04-01 23:13:57,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720e2d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:13:57, skipping insertion in model container [2023-04-01 23:13:57,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:13:56" (2/3) ... [2023-04-01 23:13:57,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720e2d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:13:57, skipping insertion in model container [2023-04-01 23:13:57,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:13:57" (3/3) ... [2023-04-01 23:13:57,919 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label34.c [2023-04-01 23:13:57,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:13:57,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:13:57,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:13:57,974 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;@4986a20a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:13:57,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:13:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 399 states have (on average 1.8245614035087718) internal successors, (728), 400 states have internal predecessors, (728), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:13:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 23:13:57,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:57,985 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] [2023-04-01 23:13:57,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:57,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1994936823, now seen corresponding path program 1 times [2023-04-01 23:13:57,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:57,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455400197] [2023-04-01 23:13:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:58,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:58,377 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 23:13:58,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:58,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455400197] [2023-04-01 23:13:58,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455400197] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:13:58,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:13:58,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:13:58,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123240158] [2023-04-01 23:13:58,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:13:58,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:13:58,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:58,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:13:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:13:58,415 INFO L87 Difference]: Start difference. First operand has 409 states, 399 states have (on average 1.8245614035087718) internal successors, (728), 400 states have internal predecessors, (728), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 23:14:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:01,356 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2023-04-01 23:14:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:14:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 40 [2023-04-01 23:14:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:01,372 INFO L225 Difference]: With dead ends: 1515 [2023-04-01 23:14:01,373 INFO L226 Difference]: Without dead ends: 1038 [2023-04-01 23:14:01,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:14:01,383 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2243 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2243 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 887 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:01,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2243 Valid, 39 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [887 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 23:14:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2023-04-01 23:14:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2023-04-01 23:14:01,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1010 states have (on average 1.5950495049504951) internal successors, (1611), 1013 states have internal predecessors, (1611), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2023-04-01 23:14:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2023-04-01 23:14:01,468 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 40 [2023-04-01 23:14:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:01,470 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2023-04-01 23:14:01,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 23:14:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2023-04-01 23:14:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-04-01 23:14:01,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:01,484 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:14:01,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:14:01,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:01,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1923068553, now seen corresponding path program 1 times [2023-04-01 23:14:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:01,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226806395] [2023-04-01 23:14:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:01,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:01,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:01,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 23:14:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 66 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:14:01,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:01,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226806395] [2023-04-01 23:14:01,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226806395] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:01,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832613478] [2023-04-01 23:14:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:01,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:01,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:01,899 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 23:14:01,923 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 23:14:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:02,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:14:02,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 23:14:02,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:14:02,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832613478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:14:02,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:14:02,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 23:14:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052933120] [2023-04-01 23:14:02,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:14:02,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:14:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:02,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:14:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:14:02,144 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 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 23:14:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:03,565 INFO L93 Difference]: Finished difference Result 2427 states and 3816 transitions. [2023-04-01 23:14:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:14:03,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 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 222 [2023-04-01 23:14:03,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:03,572 INFO L225 Difference]: With dead ends: 2427 [2023-04-01 23:14:03,572 INFO L226 Difference]: Without dead ends: 1402 [2023-04-01 23:14:03,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:14:03,575 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1049 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:03,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 66 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 23:14:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2023-04-01 23:14:03,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1380. [2023-04-01 23:14:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1350 states have (on average 1.3874074074074074) internal successors, (1873), 1356 states have internal predecessors, (1873), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (41), 13 states have call predecessors, (41), 9 states have call successors, (41) [2023-04-01 23:14:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1924 transitions. [2023-04-01 23:14:03,610 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1924 transitions. Word has length 222 [2023-04-01 23:14:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:03,610 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 1924 transitions. [2023-04-01 23:14:03,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 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 23:14:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1924 transitions. [2023-04-01 23:14:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-04-01 23:14:03,613 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:03,613 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:14:03,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:14:03,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:03,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:03,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2025701804, now seen corresponding path program 1 times [2023-04-01 23:14:03,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:03,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565638076] [2023-04-01 23:14:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:03,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:04,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:04,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-04-01 23:14:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:14:04,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:04,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565638076] [2023-04-01 23:14:04,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565638076] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:04,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972764914] [2023-04-01 23:14:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:04,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:04,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:04,165 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 23:14:04,167 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 23:14:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:04,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:14:04,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 23:14:04,390 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:14:04,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972764914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:14:04,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:14:04,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-04-01 23:14:04,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820506177] [2023-04-01 23:14:04,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:14:04,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:14:04,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:04,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:14:04,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:14:04,394 INFO L87 Difference]: Start difference. First operand 1380 states and 1924 transitions. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 4 states have internal predecessors, (183), 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 23:14:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:05,901 INFO L93 Difference]: Finished difference Result 4193 states and 5957 transitions. [2023-04-01 23:14:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:14:05,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 4 states have internal predecessors, (183), 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 223 [2023-04-01 23:14:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:05,912 INFO L225 Difference]: With dead ends: 4193 [2023-04-01 23:14:05,912 INFO L226 Difference]: Without dead ends: 2819 [2023-04-01 23:14:05,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:14:05,919 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 963 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:05,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 65 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 23:14:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-04-01 23:14:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2785. [2023-04-01 23:14:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2715 states have (on average 1.25451197053407) internal successors, (3406), 2736 states have internal predecessors, (3406), 18 states have call successors, (18), 18 states have call predecessors, (18), 51 states have return successors, (140), 30 states have call predecessors, (140), 17 states have call successors, (140) [2023-04-01 23:14:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 3564 transitions. [2023-04-01 23:14:06,017 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 3564 transitions. Word has length 223 [2023-04-01 23:14:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:06,018 INFO L495 AbstractCegarLoop]: Abstraction has 2785 states and 3564 transitions. [2023-04-01 23:14:06,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 4 states have internal predecessors, (183), 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 23:14:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 3564 transitions. [2023-04-01 23:14:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-04-01 23:14:06,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:06,021 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:14:06,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 23:14:06,226 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,SelfDestructingSolverStorable2 [2023-04-01 23:14:06,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:06,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash -798640727, now seen corresponding path program 1 times [2023-04-01 23:14:06,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:06,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695551949] [2023-04-01 23:14:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:06,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:06,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:06,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:06,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 23:14:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 23:14:06,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:06,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695551949] [2023-04-01 23:14:06,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695551949] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982592040] [2023-04-01 23:14:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:06,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:06,594 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 23:14:06,596 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 23:14:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:06,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:14:06,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:14:06,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:14:07,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982592040] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:07,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:07,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:14:07,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369589485] [2023-04-01 23:14:07,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:07,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:14:07,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:07,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:14:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:14:07,109 INFO L87 Difference]: Start difference. First operand 2785 states and 3564 transitions. Second operand has 11 states, 11 states have (on average 40.18181818181818) internal successors, (442), 9 states have internal predecessors, (442), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:14:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:09,151 INFO L93 Difference]: Finished difference Result 6992 states and 9201 transitions. [2023-04-01 23:14:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:14:09,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 40.18181818181818) internal successors, (442), 9 states have internal predecessors, (442), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 238 [2023-04-01 23:14:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:09,168 INFO L225 Difference]: With dead ends: 6992 [2023-04-01 23:14:09,168 INFO L226 Difference]: Without dead ends: 4213 [2023-04-01 23:14:09,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 478 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:14:09,176 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2463 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 2107 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2463 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 2107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:09,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2463 Valid, 63 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 2107 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 23:14:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2023-04-01 23:14:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 3161. [2023-04-01 23:14:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3070 states have (on average 1.2429967426710098) internal successors, (3816), 3103 states have internal predecessors, (3816), 20 states have call successors, (20), 20 states have call predecessors, (20), 70 states have return successors, (175), 37 states have call predecessors, (175), 19 states have call successors, (175) [2023-04-01 23:14:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4011 transitions. [2023-04-01 23:14:09,257 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4011 transitions. Word has length 238 [2023-04-01 23:14:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:09,258 INFO L495 AbstractCegarLoop]: Abstraction has 3161 states and 4011 transitions. [2023-04-01 23:14:09,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 40.18181818181818) internal successors, (442), 9 states have internal predecessors, (442), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:14:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4011 transitions. [2023-04-01 23:14:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-04-01 23:14:09,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:09,266 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:14:09,289 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 23:14:09,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:09,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:09,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:09,474 INFO L85 PathProgramCache]: Analyzing trace with hash 195597792, now seen corresponding path program 1 times [2023-04-01 23:14:09,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:09,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394938964] [2023-04-01 23:14:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:09,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:10,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:10,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:10,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 23:14:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:10,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2023-04-01 23:14:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:10,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2023-04-01 23:14:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 237 proven. 218 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2023-04-01 23:14:10,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:10,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394938964] [2023-04-01 23:14:10,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394938964] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:10,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805811501] [2023-04-01 23:14:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:10,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:10,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:10,509 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 23:14:10,553 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 23:14:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:10,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:14:10,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 628 proven. 2 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-04-01 23:14:10,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 356 proven. 107 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2023-04-01 23:14:11,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805811501] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:11,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:11,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-04-01 23:14:11,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761137649] [2023-04-01 23:14:11,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:11,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 23:14:11,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 23:14:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:14:11,060 INFO L87 Difference]: Start difference. First operand 3161 states and 4011 transitions. Second operand has 14 states, 14 states have (on average 43.07142857142857) internal successors, (603), 12 states have internal predecessors, (603), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 23:14:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:17,322 INFO L93 Difference]: Finished difference Result 10492 states and 13986 transitions. [2023-04-01 23:14:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-04-01 23:14:17,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 43.07142857142857) internal successors, (603), 12 states have internal predecessors, (603), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 491 [2023-04-01 23:14:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:17,347 INFO L225 Difference]: With dead ends: 10492 [2023-04-01 23:14:17,348 INFO L226 Difference]: Without dead ends: 7337 [2023-04-01 23:14:17,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1023 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=649, Invalid=2213, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 23:14:17,354 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6730 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 6592 mSolverCounterSat, 2729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6747 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 9321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2729 IncrementalHoareTripleChecker+Valid, 6592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:17,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6747 Valid, 143 Invalid, 9321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2729 Valid, 6592 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-04-01 23:14:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7337 states. [2023-04-01 23:14:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7337 to 6619. [2023-04-01 23:14:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6448 states have (on average 1.2593052109181142) internal successors, (8120), 6513 states have internal predecessors, (8120), 40 states have call successors, (40), 40 states have call predecessors, (40), 130 states have return successors, (609), 65 states have call predecessors, (609), 39 states have call successors, (609) [2023-04-01 23:14:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 8769 transitions. [2023-04-01 23:14:17,499 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 8769 transitions. Word has length 491 [2023-04-01 23:14:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:17,500 INFO L495 AbstractCegarLoop]: Abstraction has 6619 states and 8769 transitions. [2023-04-01 23:14:17,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 43.07142857142857) internal successors, (603), 12 states have internal predecessors, (603), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 23:14:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 8769 transitions. [2023-04-01 23:14:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-04-01 23:14:17,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:17,514 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:14:17,522 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 23:14:17,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:17,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:17,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1060855934, now seen corresponding path program 1 times [2023-04-01 23:14:17,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:17,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72215985] [2023-04-01 23:14:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:17,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:18,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:18,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:18,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:14:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:18,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-04-01 23:14:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:18,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2023-04-01 23:14:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 493 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-04-01 23:14:18,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:18,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72215985] [2023-04-01 23:14:18,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72215985] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:18,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181319914] [2023-04-01 23:14:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:18,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:18,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:18,325 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 23:14:18,327 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 23:14:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:18,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:14:18,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 496 proven. 2 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-04-01 23:14:18,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 496 proven. 2 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-04-01 23:14:19,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181319914] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:19,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:19,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:14:19,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505739220] [2023-04-01 23:14:19,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:19,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:14:19,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:19,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:14:19,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:14:19,123 INFO L87 Difference]: Start difference. First operand 6619 states and 8769 transitions. Second operand has 12 states, 12 states have (on average 67.58333333333333) internal successors, (811), 10 states have internal predecessors, (811), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:14:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:22,690 INFO L93 Difference]: Finished difference Result 17712 states and 22990 transitions. [2023-04-01 23:14:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:14:22,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 67.58333333333333) internal successors, (811), 10 states have internal predecessors, (811), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 649 [2023-04-01 23:14:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:22,723 INFO L225 Difference]: With dead ends: 17712 [2023-04-01 23:14:22,723 INFO L226 Difference]: Without dead ends: 8953 [2023-04-01 23:14:22,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 1313 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:14:22,740 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2852 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4468 mSolverCounterSat, 1350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2860 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 5818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1350 IncrementalHoareTripleChecker+Valid, 4468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:22,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2860 Valid, 121 Invalid, 5818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1350 Valid, 4468 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 23:14:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8953 states. [2023-04-01 23:14:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8953 to 6556. [2023-04-01 23:14:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6556 states, 6409 states have (on average 1.0580433765017943) internal successors, (6781), 6465 states have internal predecessors, (6781), 40 states have call successors, (40), 40 states have call predecessors, (40), 106 states have return successors, (316), 50 states have call predecessors, (316), 39 states have call successors, (316) [2023-04-01 23:14:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 7137 transitions. [2023-04-01 23:14:22,902 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 7137 transitions. Word has length 649 [2023-04-01 23:14:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:22,902 INFO L495 AbstractCegarLoop]: Abstraction has 6556 states and 7137 transitions. [2023-04-01 23:14:22,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 67.58333333333333) internal successors, (811), 10 states have internal predecessors, (811), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:14:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 7137 transitions. [2023-04-01 23:14:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2023-04-01 23:14:22,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:22,915 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:22,921 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 23:14:23,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:23,121 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:23,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1103344921, now seen corresponding path program 1 times [2023-04-01 23:14:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:23,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887946879] [2023-04-01 23:14:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:23,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:23,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:23,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:23,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:14:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:23,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-04-01 23:14:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:23,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2023-04-01 23:14:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:23,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 715 [2023-04-01 23:14:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 190 proven. 5 refuted. 0 times theorem prover too weak. 1347 trivial. 0 not checked. [2023-04-01 23:14:23,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:23,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887946879] [2023-04-01 23:14:23,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887946879] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:23,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768678322] [2023-04-01 23:14:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:23,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:23,992 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 23:14:24,028 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 23:14:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:24,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:14:24,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2023-04-01 23:14:24,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:14:24,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768678322] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:14:24,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:14:24,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:14:24,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873841253] [2023-04-01 23:14:24,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:14:24,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:14:24,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:24,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:14:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:14:24,320 INFO L87 Difference]: Start difference. First operand 6556 states and 7137 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 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 23:14:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:24,954 INFO L93 Difference]: Finished difference Result 13106 states and 14268 transitions. [2023-04-01 23:14:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:14:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 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 1001 [2023-04-01 23:14:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:24,982 INFO L225 Difference]: With dead ends: 13106 [2023-04-01 23:14:24,982 INFO L226 Difference]: Without dead ends: 6556 [2023-04-01 23:14:25,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1017 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:14:25,005 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 336 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:25,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 413 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 23:14:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2023-04-01 23:14:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6556. [2023-04-01 23:14:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6556 states, 6409 states have (on average 1.055234826025901) internal successors, (6763), 6465 states have internal predecessors, (6763), 40 states have call successors, (40), 40 states have call predecessors, (40), 106 states have return successors, (303), 50 states have call predecessors, (303), 39 states have call successors, (303) [2023-04-01 23:14:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 7106 transitions. [2023-04-01 23:14:25,123 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 7106 transitions. Word has length 1001 [2023-04-01 23:14:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:25,124 INFO L495 AbstractCegarLoop]: Abstraction has 6556 states and 7106 transitions. [2023-04-01 23:14:25,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 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 23:14:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 7106 transitions. [2023-04-01 23:14:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1117 [2023-04-01 23:14:25,140 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:25,141 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:25,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 23:14:25,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:25,350 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:25,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1573890544, now seen corresponding path program 1 times [2023-04-01 23:14:25,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:25,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877570309] [2023-04-01 23:14:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:25,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:25,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:25,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:14:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:25,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-04-01 23:14:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:25,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2023-04-01 23:14:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:25,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2023-04-01 23:14:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:26,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 694 [2023-04-01 23:14:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:26,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 909 [2023-04-01 23:14:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 595 proven. 387 refuted. 0 times theorem prover too weak. 1670 trivial. 0 not checked. [2023-04-01 23:14:26,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:26,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877570309] [2023-04-01 23:14:26,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877570309] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:26,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950407085] [2023-04-01 23:14:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:26,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:26,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:26,113 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 23:14:26,115 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 23:14:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:26,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:14:26,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 1904 proven. 2 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2023-04-01 23:14:26,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 598 proven. 390 refuted. 0 times theorem prover too weak. 1664 trivial. 0 not checked. [2023-04-01 23:14:26,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950407085] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:26,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:26,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:14:26,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372563997] [2023-04-01 23:14:26,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:26,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:14:26,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:14:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:14:26,910 INFO L87 Difference]: Start difference. First operand 6556 states and 7106 transitions. Second operand has 11 states, 11 states have (on average 81.18181818181819) internal successors, (893), 9 states have internal predecessors, (893), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:14:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:29,500 INFO L93 Difference]: Finished difference Result 14600 states and 16256 transitions. [2023-04-01 23:14:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 23:14:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 81.18181818181819) internal successors, (893), 9 states have internal predecessors, (893), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 1116 [2023-04-01 23:14:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:29,522 INFO L225 Difference]: With dead ends: 14600 [2023-04-01 23:14:29,522 INFO L226 Difference]: Without dead ends: 8050 [2023-04-01 23:14:29,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2280 GetRequests, 2255 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-01 23:14:29,535 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1940 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4329 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1945 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 4623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 4329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:29,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1945 Valid, 125 Invalid, 4623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 4329 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 23:14:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8050 states. [2023-04-01 23:14:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8050 to 7928. [2023-04-01 23:14:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7928 states, 7754 states have (on average 1.0388186742326542) internal successors, (8055), 7820 states have internal predecessors, (8055), 49 states have call successors, (49), 48 states have call predecessors, (49), 124 states have return successors, (306), 59 states have call predecessors, (306), 48 states have call successors, (306) [2023-04-01 23:14:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7928 states to 7928 states and 8410 transitions. [2023-04-01 23:14:29,655 INFO L78 Accepts]: Start accepts. Automaton has 7928 states and 8410 transitions. Word has length 1116 [2023-04-01 23:14:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:29,656 INFO L495 AbstractCegarLoop]: Abstraction has 7928 states and 8410 transitions. [2023-04-01 23:14:29,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.18181818181819) internal successors, (893), 9 states have internal predecessors, (893), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:14:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 7928 states and 8410 transitions. [2023-04-01 23:14:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1145 [2023-04-01 23:14:29,674 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:29,674 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:29,682 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 23:14:29,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:29,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:29,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1100906642, now seen corresponding path program 1 times [2023-04-01 23:14:29,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:29,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248009190] [2023-04-01 23:14:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:29,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:30,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:30,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:30,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:14:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:30,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2023-04-01 23:14:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:30,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:14:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:31,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2023-04-01 23:14:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:31,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 722 [2023-04-01 23:14:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:31,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 937 [2023-04-01 23:14:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1060 proven. 22 refuted. 0 times theorem prover too weak. 1678 trivial. 0 not checked. [2023-04-01 23:14:31,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248009190] [2023-04-01 23:14:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248009190] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242767693] [2023-04-01 23:14:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:31,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:31,220 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 23:14:31,222 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 23:14:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:31,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:14:31,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1059 proven. 2 refuted. 0 times theorem prover too weak. 1699 trivial. 0 not checked. [2023-04-01 23:14:31,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1059 proven. 2 refuted. 0 times theorem prover too weak. 1699 trivial. 0 not checked. [2023-04-01 23:14:32,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242767693] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:32,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:32,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-04-01 23:14:32,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2813156] [2023-04-01 23:14:32,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:32,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:14:32,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:32,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:14:32,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:14:32,166 INFO L87 Difference]: Start difference. First operand 7928 states and 8410 transitions. Second operand has 12 states, 12 states have (on average 67.66666666666667) internal successors, (812), 10 states have internal predecessors, (812), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:14:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:34,922 INFO L93 Difference]: Finished difference Result 16968 states and 18218 transitions. [2023-04-01 23:14:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 23:14:34,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 67.66666666666667) internal successors, (812), 10 states have internal predecessors, (812), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 1144 [2023-04-01 23:14:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:34,943 INFO L225 Difference]: With dead ends: 16968 [2023-04-01 23:14:34,944 INFO L226 Difference]: Without dead ends: 9389 [2023-04-01 23:14:34,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2327 GetRequests, 2307 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:14:34,957 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2635 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4929 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2639 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 5278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 4929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:34,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2639 Valid, 118 Invalid, 5278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 4929 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 23:14:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2023-04-01 23:14:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 9379. [2023-04-01 23:14:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9379 states, 9159 states have (on average 1.0327546675401245) internal successors, (9459), 9233 states have internal predecessors, (9459), 78 states have call successors, (78), 56 states have call predecessors, (78), 141 states have return successors, (511), 89 states have call predecessors, (511), 77 states have call successors, (511) [2023-04-01 23:14:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 10048 transitions. [2023-04-01 23:14:35,101 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 10048 transitions. Word has length 1144 [2023-04-01 23:14:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:35,102 INFO L495 AbstractCegarLoop]: Abstraction has 9379 states and 10048 transitions. [2023-04-01 23:14:35,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 67.66666666666667) internal successors, (812), 10 states have internal predecessors, (812), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:14:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 10048 transitions. [2023-04-01 23:14:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1269 [2023-04-01 23:14:35,129 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:35,130 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:35,140 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 23:14:35,340 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,SelfDestructingSolverStorable8 [2023-04-01 23:14:35,341 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:35,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:35,341 INFO L85 PathProgramCache]: Analyzing trace with hash 516665926, now seen corresponding path program 1 times [2023-04-01 23:14:35,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:35,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497184806] [2023-04-01 23:14:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:35,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:36,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:36,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:36,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:14:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:36,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2023-04-01 23:14:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:36,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:14:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:36,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2023-04-01 23:14:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 722 [2023-04-01 23:14:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:36,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 937 [2023-04-01 23:14:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:37,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:14:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2874 backedges. 625 proven. 264 refuted. 0 times theorem prover too weak. 1985 trivial. 0 not checked. [2023-04-01 23:14:37,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:37,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497184806] [2023-04-01 23:14:37,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497184806] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:37,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722391071] [2023-04-01 23:14:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:37,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:37,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:37,030 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 23:14:37,043 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 23:14:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:37,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:14:37,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2874 backedges. 956 proven. 0 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2023-04-01 23:14:38,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:14:38,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722391071] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:14:38,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:14:38,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-01 23:14:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689072258] [2023-04-01 23:14:38,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:14:38,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:14:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:14:38,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:14:38,048 INFO L87 Difference]: Start difference. First operand 9379 states and 10048 transitions. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 4 states have internal predecessors, (551), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 23:14:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:39,129 INFO L93 Difference]: Finished difference Result 19691 states and 20917 transitions. [2023-04-01 23:14:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:14:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 4 states have internal predecessors, (551), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 1268 [2023-04-01 23:14:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:39,147 INFO L225 Difference]: With dead ends: 19691 [2023-04-01 23:14:39,148 INFO L226 Difference]: Without dead ends: 10659 [2023-04-01 23:14:39,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1297 GetRequests, 1284 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:14:39,164 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 524 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:39,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 78 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 23:14:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10659 states. [2023-04-01 23:14:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10659 to 9636. [2023-04-01 23:14:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9636 states, 9430 states have (on average 1.032661717921527) internal successors, (9738), 9508 states have internal predecessors, (9738), 58 states have call successors, (58), 58 states have call predecessors, (58), 147 states have return successors, (333), 69 states have call predecessors, (333), 57 states have call successors, (333) [2023-04-01 23:14:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9636 states to 9636 states and 10129 transitions. [2023-04-01 23:14:39,290 INFO L78 Accepts]: Start accepts. Automaton has 9636 states and 10129 transitions. Word has length 1268 [2023-04-01 23:14:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:39,290 INFO L495 AbstractCegarLoop]: Abstraction has 9636 states and 10129 transitions. [2023-04-01 23:14:39,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 4 states have internal predecessors, (551), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 23:14:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9636 states and 10129 transitions. [2023-04-01 23:14:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1405 [2023-04-01 23:14:39,316 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:39,317 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2023-04-01 23:14:39,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 23:14:39,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 23:14:39,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:39,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1610840725, now seen corresponding path program 1 times [2023-04-01 23:14:39,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:39,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501994972] [2023-04-01 23:14:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:39,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:40,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:40,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:40,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 23:14:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:40,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-04-01 23:14:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:40,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2023-04-01 23:14:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:41,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 606 [2023-04-01 23:14:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:41,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 748 [2023-04-01 23:14:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:41,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 858 [2023-04-01 23:14:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:41,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1073 [2023-04-01 23:14:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:41,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:14:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3948 backedges. 808 proven. 265 refuted. 0 times theorem prover too weak. 2875 trivial. 0 not checked. [2023-04-01 23:14:41,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:41,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501994972] [2023-04-01 23:14:41,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501994972] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:41,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372397720] [2023-04-01 23:14:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:41,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:41,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:41,334 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 23:14:41,345 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 23:14:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:41,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:14:41,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3948 backedges. 726 proven. 0 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2023-04-01 23:14:41,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:14:41,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372397720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:14:41,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:14:41,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-01 23:14:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45480037] [2023-04-01 23:14:41,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:14:41,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:14:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:14:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:14:41,799 INFO L87 Difference]: Start difference. First operand 9636 states and 10129 transitions. Second operand has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 23:14:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:42,937 INFO L93 Difference]: Finished difference Result 26397 states and 27891 transitions. [2023-04-01 23:14:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:14:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 1404 [2023-04-01 23:14:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:42,962 INFO L225 Difference]: With dead ends: 26397 [2023-04-01 23:14:42,962 INFO L226 Difference]: Without dead ends: 16425 [2023-04-01 23:14:42,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1435 GetRequests, 1422 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:14:42,969 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 839 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:42,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 67 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 23:14:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16425 states. [2023-04-01 23:14:43,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16425 to 15741. [2023-04-01 23:14:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15741 states, 15444 states have (on average 1.0319217819217819) internal successors, (15937), 15540 states have internal predecessors, (15937), 94 states have call successors, (94), 94 states have call predecessors, (94), 202 states have return successors, (587), 106 states have call predecessors, (587), 93 states have call successors, (587) [2023-04-01 23:14:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15741 states to 15741 states and 16618 transitions. [2023-04-01 23:14:43,176 INFO L78 Accepts]: Start accepts. Automaton has 15741 states and 16618 transitions. Word has length 1404 [2023-04-01 23:14:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:43,176 INFO L495 AbstractCegarLoop]: Abstraction has 15741 states and 16618 transitions. [2023-04-01 23:14:43,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 23:14:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 15741 states and 16618 transitions. [2023-04-01 23:14:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1589 [2023-04-01 23:14:43,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:43,213 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 23:14:43,219 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 23:14:43,414 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,SelfDestructingSolverStorable10 [2023-04-01 23:14:43,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:43,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash 352767876, now seen corresponding path program 1 times [2023-04-01 23:14:43,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:43,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161829887] [2023-04-01 23:14:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:43,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:45,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:45,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:45,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:14:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:45,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2023-04-01 23:14:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:45,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2023-04-01 23:14:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:45,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 964 [2023-04-01 23:14:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:45,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1218 [2023-04-01 23:14:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:45,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1383 [2023-04-01 23:14:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4335 backedges. 487 proven. 1018 refuted. 0 times theorem prover too weak. 2830 trivial. 0 not checked. [2023-04-01 23:14:45,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:45,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161829887] [2023-04-01 23:14:45,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161829887] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:45,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462417404] [2023-04-01 23:14:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:45,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:45,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:45,897 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 23:14:45,900 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 23:14:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:46,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 1981 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 23:14:46,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4335 backedges. 2104 proven. 2 refuted. 0 times theorem prover too weak. 2229 trivial. 0 not checked. [2023-04-01 23:14:46,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4335 backedges. 254 proven. 2002 refuted. 0 times theorem prover too weak. 2079 trivial. 0 not checked. [2023-04-01 23:14:49,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462417404] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:49,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:49,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-04-01 23:14:49,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895756774] [2023-04-01 23:14:49,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:49,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 23:14:49,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 23:14:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:14:49,794 INFO L87 Difference]: Start difference. First operand 15741 states and 16618 transitions. Second operand has 14 states, 14 states have (on average 93.35714285714286) internal successors, (1307), 12 states have internal predecessors, (1307), 6 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 23:14:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:54,974 INFO L93 Difference]: Finished difference Result 36902 states and 39061 transitions. [2023-04-01 23:14:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-01 23:14:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 93.35714285714286) internal successors, (1307), 12 states have internal predecessors, (1307), 6 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 1588 [2023-04-01 23:14:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:55,040 INFO L225 Difference]: With dead ends: 36902 [2023-04-01 23:14:55,041 INFO L226 Difference]: Without dead ends: 21504 [2023-04-01 23:14:55,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3262 GetRequests, 3217 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 23:14:55,053 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6415 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 6689 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6417 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 7114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 6689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:55,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6417 Valid, 197 Invalid, 7114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 6689 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 23:14:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21504 states. [2023-04-01 23:14:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21504 to 18804. [2023-04-01 23:14:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18804 states, 18457 states have (on average 1.0270358129706887) internal successors, (18956), 18565 states have internal predecessors, (18956), 112 states have call successors, (112), 112 states have call predecessors, (112), 234 states have return successors, (648), 126 states have call predecessors, (648), 111 states have call successors, (648) [2023-04-01 23:14:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18804 states to 18804 states and 19716 transitions. [2023-04-01 23:14:55,319 INFO L78 Accepts]: Start accepts. Automaton has 18804 states and 19716 transitions. Word has length 1588 [2023-04-01 23:14:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:55,319 INFO L495 AbstractCegarLoop]: Abstraction has 18804 states and 19716 transitions. [2023-04-01 23:14:55,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 93.35714285714286) internal successors, (1307), 12 states have internal predecessors, (1307), 6 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 23:14:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 18804 states and 19716 transitions. [2023-04-01 23:14:55,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1829 [2023-04-01 23:14:55,356 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:55,357 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2023-04-01 23:14:55,364 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 23:14:55,564 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,SelfDestructingSolverStorable11 [2023-04-01 23:14:55,564 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:55,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash 904108616, now seen corresponding path program 1 times [2023-04-01 23:14:55,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:55,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502337010] [2023-04-01 23:14:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:55,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:14:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:14:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-04-01 23:14:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 794 [2023-04-01 23:14:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1067 [2023-04-01 23:14:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1138 [2023-04-01 23:14:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1392 [2023-04-01 23:14:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1623 [2023-04-01 23:14:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6098 backedges. 1147 proven. 731 refuted. 0 times theorem prover too weak. 4220 trivial. 0 not checked. [2023-04-01 23:14:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502337010] [2023-04-01 23:14:57,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502337010] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351390533] [2023-04-01 23:14:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:57,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:57,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:57,733 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 23:14:57,736 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 23:14:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:58,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 2295 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:14:58,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6098 backedges. 4179 proven. 2 refuted. 0 times theorem prover too weak. 1917 trivial. 0 not checked. [2023-04-01 23:14:58,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:15:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6098 backedges. 1154 proven. 723 refuted. 0 times theorem prover too weak. 4221 trivial. 0 not checked. [2023-04-01 23:15:02,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351390533] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:15:02,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:15:02,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-04-01 23:15:02,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343252898] [2023-04-01 23:15:02,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:15:02,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 23:15:02,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:15:02,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 23:15:02,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:15:02,369 INFO L87 Difference]: Start difference. First operand 18804 states and 19716 transitions. Second operand has 14 states, 14 states have (on average 95.85714285714286) internal successors, (1342), 12 states have internal predecessors, (1342), 6 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 23:15:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:15:06,245 INFO L93 Difference]: Finished difference Result 37600 states and 39431 transitions. [2023-04-01 23:15:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 23:15:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 95.85714285714286) internal successors, (1342), 12 states have internal predecessors, (1342), 6 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 1828 [2023-04-01 23:15:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:15:06,275 INFO L225 Difference]: With dead ends: 37600 [2023-04-01 23:15:06,275 INFO L226 Difference]: Without dead ends: 19141 [2023-04-01 23:15:06,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3727 GetRequests, 3691 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 23:15:06,295 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3078 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 7563 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3079 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 7849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 7563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:15:06,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3079 Valid, 177 Invalid, 7849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 7563 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 23:15:06,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19141 states. [2023-04-01 23:15:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19141 to 17789. [2023-04-01 23:15:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17789 states, 17456 states have (on average 1.027268560953254) internal successors, (17932), 17562 states have internal predecessors, (17932), 106 states have call successors, (106), 106 states have call predecessors, (106), 226 states have return successors, (618), 120 states have call predecessors, (618), 105 states have call successors, (618) [2023-04-01 23:15:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17789 states to 17789 states and 18656 transitions. [2023-04-01 23:15:06,531 INFO L78 Accepts]: Start accepts. Automaton has 17789 states and 18656 transitions. Word has length 1828 [2023-04-01 23:15:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:15:06,533 INFO L495 AbstractCegarLoop]: Abstraction has 17789 states and 18656 transitions. [2023-04-01 23:15:06,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 95.85714285714286) internal successors, (1342), 12 states have internal predecessors, (1342), 6 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 23:15:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 17789 states and 18656 transitions. [2023-04-01 23:15:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2026 [2023-04-01 23:15:06,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:15:06,573 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:06,582 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 23:15:06,780 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,SelfDestructingSolverStorable12 [2023-04-01 23:15:06,780 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:15:06,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:15:06,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1269597734, now seen corresponding path program 1 times [2023-04-01 23:15:06,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:15:06,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921140164] [2023-04-01 23:15:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:15:06,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:15:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:15:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:15:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:15:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:15:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-04-01 23:15:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 669 [2023-04-01 23:15:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 784 [2023-04-01 23:15:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:09,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1034 [2023-04-01 23:15:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:15:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:09,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1335 [2023-04-01 23:15:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:09,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1589 [2023-04-01 23:15:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:09,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1820 [2023-04-01 23:15:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7331 backedges. 1725 proven. 412 refuted. 0 times theorem prover too weak. 5194 trivial. 0 not checked. [2023-04-01 23:15:09,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:15:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921140164] [2023-04-01 23:15:09,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921140164] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:15:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488353684] [2023-04-01 23:15:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:15:09,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:15:09,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:15:09,603 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 23:15:09,605 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 23:15:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:10,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:15:10,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:15:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7331 backedges. 4338 proven. 2 refuted. 0 times theorem prover too weak. 2991 trivial. 0 not checked. [2023-04-01 23:15:10,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:15:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7331 backedges. 832 proven. 567 refuted. 0 times theorem prover too weak. 5932 trivial. 0 not checked. [2023-04-01 23:15:10,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488353684] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:15:10,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:15:10,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-04-01 23:15:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176140257] [2023-04-01 23:15:10,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:15:10,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 23:15:10,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:15:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 23:15:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:15:10,981 INFO L87 Difference]: Start difference. First operand 17789 states and 18656 transitions. Second operand has 15 states, 15 states have (on average 73.66666666666667) internal successors, (1105), 13 states have internal predecessors, (1105), 6 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-01 23:15:17,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:15:17,836 INFO L93 Difference]: Finished difference Result 39638 states and 41696 transitions. [2023-04-01 23:15:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-04-01 23:15:17,837 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 73.66666666666667) internal successors, (1105), 13 states have internal predecessors, (1105), 6 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 2025 [2023-04-01 23:15:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:15:17,914 INFO L225 Difference]: With dead ends: 39638 [2023-04-01 23:15:17,915 INFO L226 Difference]: Without dead ends: 22194 [2023-04-01 23:15:17,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4186 GetRequests, 4117 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=834, Invalid=3996, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 23:15:17,926 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 4751 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 10959 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4751 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 11498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 10959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:15:17,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4751 Valid, 276 Invalid, 11498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 10959 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-04-01 23:15:17,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22194 states. [2023-04-01 23:15:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22194 to 20836. [2023-04-01 23:15:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20836 states, 20460 states have (on average 1.0252688172043012) internal successors, (20977), 20573 states have internal predecessors, (20977), 124 states have call successors, (124), 124 states have call predecessors, (124), 251 states have return successors, (692), 138 states have call predecessors, (692), 123 states have call successors, (692) [2023-04-01 23:15:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20836 states to 20836 states and 21793 transitions. [2023-04-01 23:15:18,178 INFO L78 Accepts]: Start accepts. Automaton has 20836 states and 21793 transitions. Word has length 2025 [2023-04-01 23:15:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:15:18,179 INFO L495 AbstractCegarLoop]: Abstraction has 20836 states and 21793 transitions. [2023-04-01 23:15:18,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.66666666666667) internal successors, (1105), 13 states have internal predecessors, (1105), 6 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-01 23:15:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 20836 states and 21793 transitions. [2023-04-01 23:15:18,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2162 [2023-04-01 23:15:18,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:15:18,220 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:18,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 23:15:18,427 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,SelfDestructingSolverStorable13 [2023-04-01 23:15:18,427 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:15:18,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:15:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash -534811643, now seen corresponding path program 1 times [2023-04-01 23:15:18,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:15:18,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470169721] [2023-04-01 23:15:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:15:18,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:15:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:15:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:15:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:15:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:15:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-04-01 23:15:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 794 [2023-04-01 23:15:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 877 [2023-04-01 23:15:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1127 [2023-04-01 23:15:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1400 [2023-04-01 23:15:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:20,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1471 [2023-04-01 23:15:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1725 [2023-04-01 23:15:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:21,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1956 [2023-04-01 23:15:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8743 backedges. 1582 proven. 737 refuted. 0 times theorem prover too weak. 6424 trivial. 0 not checked. [2023-04-01 23:15:21,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:15:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470169721] [2023-04-01 23:15:21,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470169721] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:15:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212613416] [2023-04-01 23:15:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:15:21,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:15:21,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:15:21,091 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 23:15:21,112 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 23:15:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:21,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:15:21,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:16:36,069 WARN L223 SmtUtils]: Spent 47.42s on a formula simplification. DAG size of input: 420 DAG size of output: 348 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 23:17:01,809 WARN L223 SmtUtils]: Spent 22.33s on a formula simplification that was a NOOP. DAG size: 346 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 23:17:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8743 backedges. 5803 proven. 75 refuted. 0 times theorem prover too weak. 2865 trivial. 0 not checked. [2023-04-01 23:17:07,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:17:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8743 backedges. 960 proven. 209 refuted. 0 times theorem prover too weak. 7574 trivial. 0 not checked. [2023-04-01 23:17:10,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212613416] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:17:10,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:17:10,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 17 [2023-04-01 23:17:10,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245890542] [2023-04-01 23:17:10,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:17:10,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 23:17:10,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:17:10,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 23:17:10,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-04-01 23:17:10,635 INFO L87 Difference]: Start difference. First operand 20836 states and 21793 transitions. Second operand has 17 states, 17 states have (on average 72.3529411764706) internal successors, (1230), 15 states have internal predecessors, (1230), 7 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-04-01 23:17:33,282 WARN L223 SmtUtils]: Spent 22.43s on a formula simplification that was a NOOP. DAG size: 348 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 23:17:35,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]