/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/Problem13_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:36:25,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:36:25,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:36:25,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:36:25,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 22:36:25,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 22:36:25,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 22:36:25,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 22:36:25,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 22:36:25,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 22:36:25,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 22:36:25,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 22:36:25,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 22:36:25,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 22:36:25,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 22:36:25,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 22:36:25,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 22:36:25,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:36:25,695 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:36:25,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:36:25,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:36:25,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:36:25,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:36:25,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:36:25,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:36:25,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:36:25,697 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:36:25,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:36:25,697 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:36:25,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:36:25,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:36:25,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:36:25,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:36:25,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:36:25,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:36:25,698 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:36:25,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:36:25,698 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:36:25,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:36:25,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:36:25,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:36:25,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:36:25,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:36:25,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:36:25,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:36:25,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:36:25,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:36:25,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:36:25,700 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:36:25,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:36:25,700 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:36:25,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:36:25,700 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:36:25,700 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:36:25,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:36:25,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:36:25,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:36:25,892 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:36:25,892 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:36:25,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2023-04-01 22:36:27,047 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:36:27,464 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:36:27,464 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2023-04-01 22:36:27,498 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be195692d/021017145104431abea75b9c0fc055de/FLAG90440394a [2023-04-01 22:36:27,512 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be195692d/021017145104431abea75b9c0fc055de [2023-04-01 22:36:27,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:36:27,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:36:27,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:36:27,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:36:27,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:36:27,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:27" (1/1) ... [2023-04-01 22:36:27,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a2ee486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:27, skipping insertion in model container [2023-04-01 22:36:27,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:27" (1/1) ... [2023-04-01 22:36:27,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:36:27,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:36:27,905 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/Problem13_label05.c[6050,6063] [2023-04-01 22:36:28,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:36:28,652 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:36:28,679 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/Problem13_label05.c[6050,6063] [2023-04-01 22:36:29,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:36:29,103 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:36:29,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29 WrapperNode [2023-04-01 22:36:29,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:36:29,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:36:29,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:36:29,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:36:29,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (1/1) ... [2023-04-01 22:36:29,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (1/1) ... [2023-04-01 22:36:29,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (1/1) ... [2023-04-01 22:36:29,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (1/1) ... [2023-04-01 22:36:29,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (1/1) ... [2023-04-01 22:36:29,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (1/1) ... [2023-04-01 22:36:29,463 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (1/1) ... [2023-04-01 22:36:29,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (1/1) ... [2023-04-01 22:36:29,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:36:29,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:36:29,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:36:29,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:36:29,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (1/1) ... [2023-04-01 22:36:29,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:36:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:36:29,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:36:29,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:36:29,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:36:29,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:36:29,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:36:29,654 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:36:29,654 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:36:29,654 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:36:29,654 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:36:29,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:36:29,654 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:36:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:36:29,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:36:29,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:36:29,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:36:29,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:36:29,733 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:36:29,735 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:36:34,372 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:36:34,385 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:36:34,386 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:36:34,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:36:34 BoogieIcfgContainer [2023-04-01 22:36:34,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:36:34,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:36:34,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:36:34,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:36:34,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:36:27" (1/3) ... [2023-04-01 22:36:34,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f33252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:36:34, skipping insertion in model container [2023-04-01 22:36:34,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:29" (2/3) ... [2023-04-01 22:36:34,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f33252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:36:34, skipping insertion in model container [2023-04-01 22:36:34,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:36:34" (3/3) ... [2023-04-01 22:36:34,396 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label05.c [2023-04-01 22:36:34,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:36:34,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:36:34,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:36:34,491 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;@2174c05c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:36:34,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:36:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 22:36:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 22:36:34,512 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:34,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:36:34,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:34,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash -103618567, now seen corresponding path program 1 times [2023-04-01 22:36:34,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:34,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107386661] [2023-04-01 22:36:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:34,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:35,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:35,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107386661] [2023-04-01 22:36:35,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107386661] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:36:35,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:36:35,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 22:36:35,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590154162] [2023-04-01 22:36:35,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:35,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:36:35,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:35,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:36:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:36:35,045 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:36:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:43,306 INFO L93 Difference]: Finished difference Result 3970 states and 7414 transitions. [2023-04-01 22:36:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:36:43,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 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 48 [2023-04-01 22:36:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:43,331 INFO L225 Difference]: With dead ends: 3970 [2023-04-01 22:36:43,332 INFO L226 Difference]: Without dead ends: 2783 [2023-04-01 22:36:43,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:36:43,343 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 5683 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 5250 mSolverCounterSat, 2383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5683 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 7633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2383 IncrementalHoareTripleChecker+Valid, 5250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:43,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5683 Valid, 348 Invalid, 7633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2383 Valid, 5250 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-04-01 22:36:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2023-04-01 22:36:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2758. [2023-04-01 22:36:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2718 states have (on average 1.599337748344371) internal successors, (4347), 2721 states have internal predecessors, (4347), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (52), 22 states have call predecessors, (52), 13 states have call successors, (52) [2023-04-01 22:36:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 4413 transitions. [2023-04-01 22:36:43,489 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 4413 transitions. Word has length 48 [2023-04-01 22:36:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:43,490 INFO L495 AbstractCegarLoop]: Abstraction has 2758 states and 4413 transitions. [2023-04-01 22:36:43,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:36:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 4413 transitions. [2023-04-01 22:36:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 22:36:43,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:43,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:36:43,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:36:43,502 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:43,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:43,503 INFO L85 PathProgramCache]: Analyzing trace with hash 405560784, now seen corresponding path program 1 times [2023-04-01 22:36:43,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:43,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454459763] [2023-04-01 22:36:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:43,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:43,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:43,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:44,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454459763] [2023-04-01 22:36:44,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454459763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:36:44,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:36:44,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:36:44,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597020855] [2023-04-01 22:36:44,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:44,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:36:44,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:44,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:36:44,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:36:44,060 INFO L87 Difference]: Start difference. First operand 2758 states and 4413 transitions. Second operand has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 5 states have internal predecessors, (132), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:36:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:51,040 INFO L93 Difference]: Finished difference Result 8172 states and 13340 transitions. [2023-04-01 22:36:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:36:51,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 5 states have internal predecessors, (132), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 138 [2023-04-01 22:36:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:51,073 INFO L225 Difference]: With dead ends: 8172 [2023-04-01 22:36:51,073 INFO L226 Difference]: Without dead ends: 5420 [2023-04-01 22:36:51,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:36:51,081 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 3388 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 7216 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3388 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 8292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 7216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:51,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3388 Valid, 792 Invalid, 8292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 7216 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-04-01 22:36:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5420 states. [2023-04-01 22:36:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5420 to 5337. [2023-04-01 22:36:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5221 states have (on average 1.4443593181382877) internal successors, (7541), 5243 states have internal predecessors, (7541), 26 states have call successors, (26), 26 states have call predecessors, (26), 89 states have return successors, (274), 67 states have call predecessors, (274), 25 states have call successors, (274) [2023-04-01 22:36:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 7841 transitions. [2023-04-01 22:36:51,230 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 7841 transitions. Word has length 138 [2023-04-01 22:36:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:51,232 INFO L495 AbstractCegarLoop]: Abstraction has 5337 states and 7841 transitions. [2023-04-01 22:36:51,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 5 states have internal predecessors, (132), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:36:51,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 7841 transitions. [2023-04-01 22:36:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 22:36:51,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:51,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:36:51,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:36:51,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:51,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2019262709, now seen corresponding path program 1 times [2023-04-01 22:36:51,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:51,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315675694] [2023-04-01 22:36:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:51,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:51,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 22:36:51,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:51,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315675694] [2023-04-01 22:36:51,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315675694] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:36:51,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285128702] [2023-04-01 22:36:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:51,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:36:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:36:51,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:36:51,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:36:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:51,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:36:51,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:36:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:52,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:36:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:52,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285128702] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 22:36:52,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:36:52,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 14 [2023-04-01 22:36:52,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713833149] [2023-04-01 22:36:52,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:52,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 22:36:52,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 22:36:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:36:52,473 INFO L87 Difference]: Start difference. First operand 5337 states and 7841 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:36:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:59,878 INFO L93 Difference]: Finished difference Result 20844 states and 32049 transitions. [2023-04-01 22:36:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 22:36:59,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 148 [2023-04-01 22:36:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:59,959 INFO L225 Difference]: With dead ends: 20844 [2023-04-01 22:36:59,959 INFO L226 Difference]: Without dead ends: 15513 [2023-04-01 22:36:59,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:36:59,976 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 4673 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 6087 mSolverCounterSat, 2649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4673 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 8736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2649 IncrementalHoareTripleChecker+Valid, 6087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:59,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4673 Valid, 473 Invalid, 8736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2649 Valid, 6087 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-04-01 22:36:59,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15513 states. [2023-04-01 22:37:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15513 to 15383. [2023-04-01 22:37:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15383 states, 15041 states have (on average 1.379496044146001) internal successors, (20749), 15105 states have internal predecessors, (20749), 74 states have call successors, (74), 74 states have call predecessors, (74), 267 states have return successors, (1887), 203 states have call predecessors, (1887), 73 states have call successors, (1887) [2023-04-01 22:37:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15383 states to 15383 states and 22710 transitions. [2023-04-01 22:37:00,399 INFO L78 Accepts]: Start accepts. Automaton has 15383 states and 22710 transitions. Word has length 148 [2023-04-01 22:37:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:00,400 INFO L495 AbstractCegarLoop]: Abstraction has 15383 states and 22710 transitions. [2023-04-01 22:37:00,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:37:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 15383 states and 22710 transitions. [2023-04-01 22:37:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-01 22:37:00,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:00,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:37:00,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 22:37:00,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:00,613 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:00,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:00,614 INFO L85 PathProgramCache]: Analyzing trace with hash 442659649, now seen corresponding path program 1 times [2023-04-01 22:37:00,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:00,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640195195] [2023-04-01 22:37:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:00,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:00,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:00,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:37:00,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640195195] [2023-04-01 22:37:00,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640195195] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:37:00,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13897083] [2023-04-01 22:37:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:00,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:00,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:37:00,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:37:00,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:37:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:00,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:37:00,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:37:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:37:01,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:37:01,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13897083] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:37:01,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:37:01,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:37:01,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852944504] [2023-04-01 22:37:01,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:37:01,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:37:01,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:01,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:37:01,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:37:01,060 INFO L87 Difference]: Start difference. First operand 15383 states and 22710 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:37:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:37:04,427 INFO L93 Difference]: Finished difference Result 45541 states and 70458 transitions. [2023-04-01 22:37:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:37:04,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2023-04-01 22:37:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:37:04,559 INFO L225 Difference]: With dead ends: 45541 [2023-04-01 22:37:04,559 INFO L226 Difference]: Without dead ends: 30164 [2023-04-01 22:37:04,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:37:04,605 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 1137 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2514 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 3257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 2514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:37:04,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 1614 Invalid, 3257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 2514 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 22:37:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30164 states. [2023-04-01 22:37:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30164 to 30155. [2023-04-01 22:37:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30155 states, 29549 states have (on average 1.3287759315036043) internal successors, (39264), 29654 states have internal predecessors, (39264), 146 states have call successors, (146), 146 states have call predecessors, (146), 459 states have return successors, (5540), 354 states have call predecessors, (5540), 145 states have call successors, (5540) [2023-04-01 22:37:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30155 states to 30155 states and 44950 transitions. [2023-04-01 22:37:05,545 INFO L78 Accepts]: Start accepts. Automaton has 30155 states and 44950 transitions. Word has length 168 [2023-04-01 22:37:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:05,550 INFO L495 AbstractCegarLoop]: Abstraction has 30155 states and 44950 transitions. [2023-04-01 22:37:05,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:37:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 30155 states and 44950 transitions. [2023-04-01 22:37:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-04-01 22:37:05,555 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:05,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:37:05,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:37:05,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 22:37:05,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:05,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1511675970, now seen corresponding path program 1 times [2023-04-01 22:37:05,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:05,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415785075] [2023-04-01 22:37:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:05,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:06,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:06,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:37:06,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:06,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415785075] [2023-04-01 22:37:06,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415785075] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:37:06,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:37:06,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:37:06,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279940811] [2023-04-01 22:37:06,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:37:06,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:37:06,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:37:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:37:06,285 INFO L87 Difference]: Start difference. First operand 30155 states and 44950 transitions. Second operand has 7 states, 6 states have (on average 36.166666666666664) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:37:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:37:12,749 INFO L93 Difference]: Finished difference Result 86897 states and 137155 transitions. [2023-04-01 22:37:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:37:12,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 36.166666666666664) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 223 [2023-04-01 22:37:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:37:12,978 INFO L225 Difference]: With dead ends: 86897 [2023-04-01 22:37:12,978 INFO L226 Difference]: Without dead ends: 56748 [2023-04-01 22:37:13,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:37:13,044 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 4683 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 6262 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4683 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 7028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 6262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:37:13,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4683 Valid, 680 Invalid, 7028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 6262 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-01 22:37:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56748 states. [2023-04-01 22:37:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56748 to 56724. [2023-04-01 22:37:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56724 states, 55543 states have (on average 1.2792071008047818) internal successors, (71051), 55764 states have internal predecessors, (71051), 274 states have call successors, (274), 274 states have call predecessors, (274), 906 states have return successors, (14279), 685 states have call predecessors, (14279), 273 states have call successors, (14279) [2023-04-01 22:37:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56724 states to 56724 states and 85604 transitions. [2023-04-01 22:37:14,433 INFO L78 Accepts]: Start accepts. Automaton has 56724 states and 85604 transitions. Word has length 223 [2023-04-01 22:37:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:14,434 INFO L495 AbstractCegarLoop]: Abstraction has 56724 states and 85604 transitions. [2023-04-01 22:37:14,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 36.166666666666664) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:37:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 56724 states and 85604 transitions. [2023-04-01 22:37:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-04-01 22:37:14,444 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:14,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:37:14,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 22:37:14,445 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:14,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:14,445 INFO L85 PathProgramCache]: Analyzing trace with hash -579698528, now seen corresponding path program 1 times [2023-04-01 22:37:14,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:14,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031950527] [2023-04-01 22:37:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:14,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:14,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:14,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:14,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-04-01 22:37:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 22:37:14,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:14,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031950527] [2023-04-01 22:37:14,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031950527] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:37:14,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047065161] [2023-04-01 22:37:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:14,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:14,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:37:14,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:37:14,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:37:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:14,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 22:37:14,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:37:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 22:37:15,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:37:15,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047065161] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:37:15,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:37:15,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 22:37:15,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791673102] [2023-04-01 22:37:15,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:37:15,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:37:15,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:37:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:37:15,060 INFO L87 Difference]: Start difference. First operand 56724 states and 85604 transitions. Second operand has 5 states, 5 states have (on average 46.0) internal successors, (230), 4 states have internal predecessors, (230), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:37:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:37:20,053 INFO L93 Difference]: Finished difference Result 112264 states and 175170 transitions. [2023-04-01 22:37:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 22:37:20,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 4 states have internal predecessors, (230), 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 278 [2023-04-01 22:37:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:37:20,274 INFO L225 Difference]: With dead ends: 112264 [2023-04-01 22:37:20,274 INFO L226 Difference]: Without dead ends: 56349 [2023-04-01 22:37:20,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:37:20,381 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 3149 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4200 mSolverCounterSat, 1389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3149 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 5589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1389 IncrementalHoareTripleChecker+Valid, 4200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:37:20,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3149 Valid, 659 Invalid, 5589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1389 Valid, 4200 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 22:37:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56349 states. [2023-04-01 22:37:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56349 to 56139. [2023-04-01 22:37:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56139 states, 54876 states have (on average 1.1724615496756323) internal successors, (64340), 55132 states have internal predecessors, (64340), 270 states have call successors, (270), 270 states have call predecessors, (270), 992 states have return successors, (10135), 736 states have call predecessors, (10135), 269 states have call successors, (10135) [2023-04-01 22:37:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56139 states to 56139 states and 74745 transitions. [2023-04-01 22:37:21,674 INFO L78 Accepts]: Start accepts. Automaton has 56139 states and 74745 transitions. Word has length 278 [2023-04-01 22:37:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:21,675 INFO L495 AbstractCegarLoop]: Abstraction has 56139 states and 74745 transitions. [2023-04-01 22:37:21,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 4 states have internal predecessors, (230), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:37:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 56139 states and 74745 transitions. [2023-04-01 22:37:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-04-01 22:37:21,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:21,684 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-04-01 22:37:21,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 22:37:21,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:21,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:21,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:21,891 INFO L85 PathProgramCache]: Analyzing trace with hash 285860269, now seen corresponding path program 1 times [2023-04-01 22:37:21,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:21,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092811736] [2023-04-01 22:37:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:21,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:22,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:22,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:37:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:22,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:37:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 126 proven. 3 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-04-01 22:37:22,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:22,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092811736] [2023-04-01 22:37:22,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092811736] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:37:22,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650560595] [2023-04-01 22:37:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:22,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:22,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:37:22,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:37:22,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:37:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:22,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:37:22,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:37:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-04-01 22:37:23,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:37:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650560595] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:37:23,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:37:23,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 22:37:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775880751] [2023-04-01 22:37:23,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:37:23,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:37:23,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:37:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:37:23,228 INFO L87 Difference]: Start difference. First operand 56139 states and 74745 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:37:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:37:28,255 INFO L93 Difference]: Finished difference Result 121370 states and 163739 transitions. [2023-04-01 22:37:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 22:37:28,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 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 293 [2023-04-01 22:37:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:37:28,401 INFO L225 Difference]: With dead ends: 121370 [2023-04-01 22:37:28,402 INFO L226 Difference]: Without dead ends: 66040 [2023-04-01 22:37:28,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:37:28,455 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 2696 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 5289 mSolverCounterSat, 895 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2696 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 6184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 895 IncrementalHoareTripleChecker+Valid, 5289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:37:28,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2696 Valid, 580 Invalid, 6184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [895 Valid, 5289 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 22:37:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66040 states. [2023-04-01 22:37:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66040 to 65878. [2023-04-01 22:37:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65878 states, 64173 states have (on average 1.153039440263039) internal successors, (73994), 64593 states have internal predecessors, (73994), 314 states have call successors, (314), 314 states have call predecessors, (314), 1390 states have return successors, (14205), 970 states have call predecessors, (14205), 313 states have call successors, (14205) [2023-04-01 22:37:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65878 states to 65878 states and 88513 transitions. [2023-04-01 22:37:30,305 INFO L78 Accepts]: Start accepts. Automaton has 65878 states and 88513 transitions. Word has length 293 [2023-04-01 22:37:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:30,305 INFO L495 AbstractCegarLoop]: Abstraction has 65878 states and 88513 transitions. [2023-04-01 22:37:30,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:37:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 65878 states and 88513 transitions. [2023-04-01 22:37:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-04-01 22:37:30,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:30,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:37:30,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:37:30,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:30,519 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:30,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:30,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2041468498, now seen corresponding path program 1 times [2023-04-01 22:37:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:30,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153614146] [2023-04-01 22:37:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:30,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:31,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:31,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:31,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:37:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 83 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:37:31,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153614146] [2023-04-01 22:37:31,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153614146] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:37:31,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569704227] [2023-04-01 22:37:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:31,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:31,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:37:31,761 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:37:31,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:37:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:31,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:37:31,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:37:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 22:37:32,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:37:32,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569704227] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:37:32,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:37:32,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2023-04-01 22:37:32,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939842200] [2023-04-01 22:37:32,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:37:32,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:37:32,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:32,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:37:32,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:37:32,127 INFO L87 Difference]: Start difference. First operand 65878 states and 88513 transitions. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:37:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:37:37,100 INFO L93 Difference]: Finished difference Result 120935 states and 165884 transitions. [2023-04-01 22:37:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:37:37,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 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 293 [2023-04-01 22:37:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:37:37,422 INFO L225 Difference]: With dead ends: 120935 [2023-04-01 22:37:37,423 INFO L226 Difference]: Without dead ends: 66444 [2023-04-01 22:37:37,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:37:37,486 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 2288 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 5803 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2288 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 5970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 5803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:37:37,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2288 Valid, 654 Invalid, 5970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 5803 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 22:37:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66444 states. [2023-04-01 22:37:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66444 to 66201. [2023-04-01 22:37:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66201 states, 64366 states have (on average 1.152502874188236) internal successors, (74182), 64853 states have internal predecessors, (74182), 314 states have call successors, (314), 314 states have call predecessors, (314), 1520 states have return successors, (15125), 1033 states have call predecessors, (15125), 313 states have call successors, (15125) [2023-04-01 22:37:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66201 states to 66201 states and 89621 transitions. [2023-04-01 22:37:38,861 INFO L78 Accepts]: Start accepts. Automaton has 66201 states and 89621 transitions. Word has length 293 [2023-04-01 22:37:38,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:38,862 INFO L495 AbstractCegarLoop]: Abstraction has 66201 states and 89621 transitions. [2023-04-01 22:37:38,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:37:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 66201 states and 89621 transitions. [2023-04-01 22:37:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-04-01 22:37:38,874 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:38,875 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 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] [2023-04-01 22:37:38,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 22:37:39,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:39,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:39,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash -372339151, now seen corresponding path program 1 times [2023-04-01 22:37:39,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:39,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487657074] [2023-04-01 22:37:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:39,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:39,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:39,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:39,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:37:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:39,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2023-04-01 22:37:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:39,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2023-04-01 22:37:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 169 proven. 4 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2023-04-01 22:37:39,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:39,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487657074] [2023-04-01 22:37:39,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487657074] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:37:39,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370907482] [2023-04-01 22:37:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:39,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:39,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:37:39,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:37:39,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:37:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:40,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 22:37:40,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:37:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 475 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-04-01 22:37:40,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:37:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 173 proven. 380 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 22:37:42,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370907482] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:37:42,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:37:42,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2023-04-01 22:37:42,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156179599] [2023-04-01 22:37:42,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:37:42,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 22:37:42,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 22:37:42,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:37:42,364 INFO L87 Difference]: Start difference. First operand 66201 states and 89621 transitions. Second operand has 16 states, 16 states have (on average 37.9375) internal successors, (607), 14 states have internal predecessors, (607), 7 states have call successors, (13), 11 states have call predecessors, (13), 8 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 22:38:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:38:18,133 INFO L93 Difference]: Finished difference Result 210264 states and 314424 transitions. [2023-04-01 22:38:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-04-01 22:38:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 37.9375) internal successors, (607), 14 states have internal predecessors, (607), 7 states have call successors, (13), 11 states have call predecessors, (13), 8 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 393 [2023-04-01 22:38:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:38:18,832 INFO L225 Difference]: With dead ends: 210264 [2023-04-01 22:38:18,832 INFO L226 Difference]: Without dead ends: 144872 [2023-04-01 22:38:18,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 884 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5520 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2574, Invalid=11468, Unknown=0, NotChecked=0, Total=14042 [2023-04-01 22:38:18,915 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 18899 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 31992 mSolverCounterSat, 10501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18915 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 42493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10501 IncrementalHoareTripleChecker+Valid, 31992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:38:18,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18915 Valid, 1918 Invalid, 42493 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10501 Valid, 31992 Invalid, 0 Unknown, 0 Unchecked, 31.0s Time] [2023-04-01 22:38:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144872 states. [2023-04-01 22:38:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144872 to 143568. [2023-04-01 22:38:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143568 states, 140275 states have (on average 1.1673854927820353) internal successors, (163755), 141096 states have internal predecessors, (163755), 690 states have call successors, (690), 690 states have call predecessors, (690), 2602 states have return successors, (41950), 1781 states have call predecessors, (41950), 689 states have call successors, (41950) [2023-04-01 22:38:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143568 states to 143568 states and 206395 transitions. [2023-04-01 22:38:22,510 INFO L78 Accepts]: Start accepts. Automaton has 143568 states and 206395 transitions. Word has length 393 [2023-04-01 22:38:22,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:38:22,510 INFO L495 AbstractCegarLoop]: Abstraction has 143568 states and 206395 transitions. [2023-04-01 22:38:22,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 37.9375) internal successors, (607), 14 states have internal predecessors, (607), 7 states have call successors, (13), 11 states have call predecessors, (13), 8 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 22:38:22,511 INFO L276 IsEmpty]: Start isEmpty. Operand 143568 states and 206395 transitions. [2023-04-01 22:38:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2023-04-01 22:38:22,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:38:22,528 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 22:38:22,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 22:38:22,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:22,735 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:38:22,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:38:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1465853206, now seen corresponding path program 1 times [2023-04-01 22:38:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:38:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612980558] [2023-04-01 22:38:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:22,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:38:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:23,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:38:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:23,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:38:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:24,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:38:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:24,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2023-04-01 22:38:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 224 proven. 210 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:38:24,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:38:24,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612980558] [2023-04-01 22:38:24,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612980558] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:38:24,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565033029] [2023-04-01 22:38:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:24,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:24,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:38:24,585 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:38:24,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:38:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:24,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:38:24,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:38:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 342 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 22:38:25,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:38:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 342 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 22:38:25,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565033029] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:38:25,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:38:25,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2023-04-01 22:38:25,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518313926] [2023-04-01 22:38:25,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:38:25,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 22:38:25,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:38:25,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 22:38:25,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:38:25,460 INFO L87 Difference]: Start difference. First operand 143568 states and 206395 transitions. Second operand has 15 states, 15 states have (on average 48.06666666666667) internal successors, (721), 13 states have internal predecessors, (721), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 22:38:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:38:42,500 INFO L93 Difference]: Finished difference Result 456038 states and 684175 transitions. [2023-04-01 22:38:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-04-01 22:38:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 48.06666666666667) internal successors, (721), 13 states have internal predecessors, (721), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 422 [2023-04-01 22:38:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:38:43,887 INFO L225 Difference]: With dead ends: 456038 [2023-04-01 22:38:43,887 INFO L226 Difference]: Without dead ends: 314084 [2023-04-01 22:38:44,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 883 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=653, Invalid=2887, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 22:38:44,117 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 12711 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 15533 mSolverCounterSat, 4042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12711 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 19575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4042 IncrementalHoareTripleChecker+Valid, 15533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:38:44,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12711 Valid, 1531 Invalid, 19575 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4042 Valid, 15533 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2023-04-01 22:38:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314084 states. [2023-04-01 22:38:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314084 to 305356. [2023-04-01 22:38:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305356 states, 299449 states have (on average 1.1250997665712692) internal successors, (336910), 300755 states have internal predecessors, (336910), 1482 states have call successors, (1482), 1482 states have call predecessors, (1482), 4424 states have return successors, (74661), 3118 states have call predecessors, (74661), 1481 states have call successors, (74661) [2023-04-01 22:38:51,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305356 states to 305356 states and 413053 transitions. [2023-04-01 22:38:51,466 INFO L78 Accepts]: Start accepts. Automaton has 305356 states and 413053 transitions. Word has length 422 [2023-04-01 22:38:51,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:38:51,466 INFO L495 AbstractCegarLoop]: Abstraction has 305356 states and 413053 transitions. [2023-04-01 22:38:51,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 48.06666666666667) internal successors, (721), 13 states have internal predecessors, (721), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 22:38:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 305356 states and 413053 transitions. [2023-04-01 22:38:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-04-01 22:38:51,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:38:51,514 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:38:51,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 22:38:51,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:51,720 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:38:51,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:38:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1043269909, now seen corresponding path program 1 times [2023-04-01 22:38:51,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:38:51,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113130291] [2023-04-01 22:38:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:38:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:52,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:38:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:52,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:38:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:52,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:38:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:53,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 22:38:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 242 proven. 239 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:38:53,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:38:53,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113130291] [2023-04-01 22:38:53,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113130291] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:38:53,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531444116] [2023-04-01 22:38:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:53,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:53,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:38:53,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:38:53,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:38:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:53,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 22:38:53,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:38:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 444 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 22:38:55,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:38:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 128 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:38:58,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531444116] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:38:58,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:38:58,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-04-01 22:38:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996657465] [2023-04-01 22:38:58,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:38:58,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:38:58,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:38:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:38:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:38:58,792 INFO L87 Difference]: Start difference. First operand 305356 states and 413053 transitions. Second operand has 25 states, 25 states have (on average 49.8) internal successors, (1245), 23 states have internal predecessors, (1245), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11)