/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_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:26:06,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:26:06,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:26:06,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:26:06,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:26:06,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:26:06,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:26:06,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:26:06,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:26:06,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:26:06,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:26:06,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:26:06,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:26:06,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:26:06,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:26:06,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:26:06,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:26:06,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:26:06,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:26:06,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:26:06,488 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 [2023-03-30 23:26:06,518 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:26:06,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:26:06,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:26:06,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:26:06,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:26:06,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:26:06,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:26:06,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:26:06,520 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:26:06,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:26:06,520 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:26:06,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:26:06,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:26:06,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:26:06,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:26:06,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:26:06,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:26:06,524 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:26:06,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:26:06,524 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:26:06,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:26:06,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:26:06,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:26:06,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:26:06,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:26:06,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:26:06,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:26:06,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:26:06,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:26:06,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:26:06,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:26:06,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:26:06,526 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:26:06,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:26:06,526 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:26:06,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:26:06,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:26:06,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:26:06,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:26:06,771 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:26:06,771 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:26:06,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label48.c [2023-03-30 23:26:07,972 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:26:08,452 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:26:08,453 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label48.c [2023-03-30 23:26:08,485 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dbf5b852/4dbe3b921fae4d70b311139a0508c9fb/FLAG87daa3b5a [2023-03-30 23:26:08,503 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dbf5b852/4dbe3b921fae4d70b311139a0508c9fb [2023-03-30 23:26:08,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:26:08,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:26:08,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:26:08,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:26:08,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:26:08,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:26:08" (1/1) ... [2023-03-30 23:26:08,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9e2184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:08, skipping insertion in model container [2023-03-30 23:26:08,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:26:08" (1/1) ... [2023-03-30 23:26:08,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:26:08,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:26:08,839 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_label48.c[1234,1247] [2023-03-30 23:26:09,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:26:09,631 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:26:09,643 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_label48.c[1234,1247] [2023-03-30 23:26:10,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:26:10,125 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:26:10,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10 WrapperNode [2023-03-30 23:26:10,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:26:10,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:26:10,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:26:10,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:26:10,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (1/1) ... [2023-03-30 23:26:10,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (1/1) ... [2023-03-30 23:26:10,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (1/1) ... [2023-03-30 23:26:10,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (1/1) ... [2023-03-30 23:26:10,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (1/1) ... [2023-03-30 23:26:10,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (1/1) ... [2023-03-30 23:26:10,434 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (1/1) ... [2023-03-30 23:26:10,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (1/1) ... [2023-03-30 23:26:10,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:26:10,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:26:10,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:26:10,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:26:10,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (1/1) ... [2023-03-30 23:26:10,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:26:10,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:26:10,550 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) [2023-03-30 23:26:10,576 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 [2023-03-30 23:26:10,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:26:10,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:26:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:26:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:26:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:26:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:26:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:26:10,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:26:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:26:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:26:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:26:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:26:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:26:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:26:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:26:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:26:10,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:26:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:26:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:26:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:26:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:26:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:26:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:26:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:26:10,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:26:10,686 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:26:10,688 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:26:15,505 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:26:15,529 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:26:15,529 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:26:15,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:26:15 BoogieIcfgContainer [2023-03-30 23:26:15,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:26:15,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:26:15,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:26:15,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:26:15,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:26:08" (1/3) ... [2023-03-30 23:26:15,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2480fec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:26:15, skipping insertion in model container [2023-03-30 23:26:15,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:10" (2/3) ... [2023-03-30 23:26:15,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2480fec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:26:15, skipping insertion in model container [2023-03-30 23:26:15,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:26:15" (3/3) ... [2023-03-30 23:26:15,541 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label48.c [2023-03-30 23:26:15,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:26:15,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:26:15,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:26:15,638 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;@6e30a27e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:26:15,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:26:15,648 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) [2023-03-30 23:26:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-30 23:26:15,654 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:15,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:26:15,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:15,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1376076631, now seen corresponding path program 1 times [2023-03-30 23:26:15,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:15,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146494463] [2023-03-30 23:26:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:15,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:15,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:26:16,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:16,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146494463] [2023-03-30 23:26:16,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146494463] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:26:16,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:26:16,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:26:16,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607096677] [2023-03-30 23:26:16,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:26:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:26:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:16,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:26:16,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:26:16,101 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 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-03-30 23:26:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:26:24,829 INFO L93 Difference]: Finished difference Result 3986 states and 7441 transitions. [2023-03-30 23:26:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:26:24,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2023-03-30 23:26:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:26:24,863 INFO L225 Difference]: With dead ends: 3986 [2023-03-30 23:26:24,863 INFO L226 Difference]: Without dead ends: 2799 [2023-03-30 23:26:24,873 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 [2023-03-30 23:26:24,877 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 5742 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 5265 mSolverCounterSat, 2502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5742 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 7767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2502 IncrementalHoareTripleChecker+Valid, 5265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:26:24,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5742 Valid, 362 Invalid, 7767 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2502 Valid, 5265 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-03-30 23:26:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2023-03-30 23:26:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2764. [2023-03-30 23:26:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2724 states have (on average 1.5884728340675478) internal successors, (4327), 2727 states have internal predecessors, (4327), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (53), 22 states have call predecessors, (53), 13 states have call successors, (53) [2023-03-30 23:26:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 4394 transitions. [2023-03-30 23:26:25,091 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 4394 transitions. Word has length 12 [2023-03-30 23:26:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:26:25,091 INFO L495 AbstractCegarLoop]: Abstraction has 2764 states and 4394 transitions. [2023-03-30 23:26:25,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-03-30 23:26:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 4394 transitions. [2023-03-30 23:26:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-03-30 23:26:25,096 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:25,097 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:26:25,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:26:25,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:25,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:25,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1621750105, now seen corresponding path program 1 times [2023-03-30 23:26:25,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:25,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858021768] [2023-03-30 23:26:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:25,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:25,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:25,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:26:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:26:25,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:25,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858021768] [2023-03-30 23:26:25,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858021768] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:26:25,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752995143] [2023-03-30 23:26:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:25,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:26:25,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:26:25,449 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) [2023-03-30 23:26:25,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:26:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:25,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 23:26:25,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:26:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:26:25,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:26:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:26:26,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752995143] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:26:26,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:26:26,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2023-03-30 23:26:26,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540938913] [2023-03-30 23:26:26,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:26:26,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:26:26,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:26,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:26:26,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:26:26,082 INFO L87 Difference]: Start difference. First operand 2764 states and 4394 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:26:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:26:29,946 INFO L93 Difference]: Finished difference Result 8145 states and 13114 transitions. [2023-03-30 23:26:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 23:26:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 105 [2023-03-30 23:26:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:26:29,969 INFO L225 Difference]: With dead ends: 8145 [2023-03-30 23:26:29,969 INFO L226 Difference]: Without dead ends: 5387 [2023-03-30 23:26:29,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:26:29,977 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 2512 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 3233 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2512 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 3792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 3233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:26:29,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2512 Valid, 692 Invalid, 3792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 3233 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-03-30 23:26:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5387 states. [2023-03-30 23:26:30,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5387 to 5373. [2023-03-30 23:26:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5373 states, 5285 states have (on average 1.466225165562914) internal successors, (7749), 5294 states have internal predecessors, (7749), 26 states have call successors, (26), 26 states have call predecessors, (26), 61 states have return successors, (203), 52 states have call predecessors, (203), 25 states have call successors, (203) [2023-03-30 23:26:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 7978 transitions. [2023-03-30 23:26:30,133 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 7978 transitions. Word has length 105 [2023-03-30 23:26:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:26:30,134 INFO L495 AbstractCegarLoop]: Abstraction has 5373 states and 7978 transitions. [2023-03-30 23:26:30,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:26:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 7978 transitions. [2023-03-30 23:26:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-03-30 23:26:30,147 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:30,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:26:30,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 23:26:30,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:26:30,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:30,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1894576999, now seen corresponding path program 1 times [2023-03-30 23:26:30,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:30,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523547875] [2023-03-30 23:26:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:30,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:30,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:30,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:26:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:30,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-03-30 23:26:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:26:30,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:30,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523547875] [2023-03-30 23:26:30,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523547875] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:26:30,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421116233] [2023-03-30 23:26:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:30,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:26:30,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:26:30,965 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) [2023-03-30 23:26:30,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:26:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:31,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-30 23:26:31,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:26:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-03-30 23:26:31,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:26:31,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421116233] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:26:31,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:26:31,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 23:26:31,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25602205] [2023-03-30 23:26:31,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:26:31,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:26:31,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:26:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:26:31,119 INFO L87 Difference]: Start difference. First operand 5373 states and 7978 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:26:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:26:35,352 INFO L93 Difference]: Finished difference Result 15786 states and 24047 transitions. [2023-03-30 23:26:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:26:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 184 [2023-03-30 23:26:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:26:35,402 INFO L225 Difference]: With dead ends: 15786 [2023-03-30 23:26:35,402 INFO L226 Difference]: Without dead ends: 10419 [2023-03-30 23:26:35,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:26:35,430 INFO L413 NwaCegarLoop]: 1841 mSDtfsCounter, 969 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 3707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:26:35,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 1969 Invalid, 3707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 3044 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-03-30 23:26:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2023-03-30 23:26:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 10349. [2023-03-30 23:26:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10349 states, 10177 states have (on average 1.4091579050800824) internal successors, (14341), 10195 states have internal predecessors, (14341), 50 states have call successors, (50), 50 states have call predecessors, (50), 121 states have return successors, (711), 103 states have call predecessors, (711), 49 states have call successors, (711) [2023-03-30 23:26:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10349 states to 10349 states and 15102 transitions. [2023-03-30 23:26:35,698 INFO L78 Accepts]: Start accepts. Automaton has 10349 states and 15102 transitions. Word has length 184 [2023-03-30 23:26:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:26:35,699 INFO L495 AbstractCegarLoop]: Abstraction has 10349 states and 15102 transitions. [2023-03-30 23:26:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:26:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 10349 states and 15102 transitions. [2023-03-30 23:26:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-03-30 23:26:35,703 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:35,703 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:26:35,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:26:35,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-30 23:26:35,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:35,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:35,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1113017230, now seen corresponding path program 1 times [2023-03-30 23:26:35,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:35,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931972320] [2023-03-30 23:26:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:35,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:36,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:36,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:26:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:36,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-03-30 23:26:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:26:36,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:36,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931972320] [2023-03-30 23:26:36,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931972320] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:26:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441835950] [2023-03-30 23:26:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:36,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:26:36,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:26:36,445 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) [2023-03-30 23:26:36,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:26:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:36,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:26:36,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:26:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 23:26:36,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:26:36,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441835950] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:26:36,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:26:36,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-03-30 23:26:36,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960076188] [2023-03-30 23:26:36,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:26:36,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:26:36,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:26:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:26:36,739 INFO L87 Difference]: Start difference. First operand 10349 states and 15102 transitions. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 4 states have internal predecessors, (189), 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) [2023-03-30 23:26:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:26:41,103 INFO L93 Difference]: Finished difference Result 30719 states and 47207 transitions. [2023-03-30 23:26:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:26:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 4 states have internal predecessors, (189), 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 201 [2023-03-30 23:26:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:26:41,190 INFO L225 Difference]: With dead ends: 30719 [2023-03-30 23:26:41,190 INFO L226 Difference]: Without dead ends: 20376 [2023-03-30 23:26:41,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:26:41,219 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 3188 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 4204 mSolverCounterSat, 1519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3188 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 5723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1519 IncrementalHoareTripleChecker+Valid, 4204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:26:41,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3188 Valid, 685 Invalid, 5723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1519 Valid, 4204 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-03-30 23:26:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20376 states. [2023-03-30 23:26:41,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20376 to 20321. [2023-03-30 23:26:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20321 states, 19922 states have (on average 1.283957433992571) internal successors, (25579), 19976 states have internal predecessors, (25579), 98 states have call successors, (98), 98 states have call predecessors, (98), 300 states have return successors, (2650), 246 states have call predecessors, (2650), 97 states have call successors, (2650) [2023-03-30 23:26:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20321 states to 20321 states and 28327 transitions. [2023-03-30 23:26:41,713 INFO L78 Accepts]: Start accepts. Automaton has 20321 states and 28327 transitions. Word has length 201 [2023-03-30 23:26:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:26:41,713 INFO L495 AbstractCegarLoop]: Abstraction has 20321 states and 28327 transitions. [2023-03-30 23:26:41,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 4 states have internal predecessors, (189), 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) [2023-03-30 23:26:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 20321 states and 28327 transitions. [2023-03-30 23:26:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-03-30 23:26:41,717 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:41,717 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:26:41,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:26:41,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:26:41,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:41,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1940451217, now seen corresponding path program 1 times [2023-03-30 23:26:41,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:41,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326787244] [2023-03-30 23:26:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:41,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:42,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:42,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:26:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:42,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-03-30 23:26:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:26:42,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:42,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326787244] [2023-03-30 23:26:42,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326787244] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:26:42,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889767691] [2023-03-30 23:26:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:42,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:26:42,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:26:42,353 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) [2023-03-30 23:26:42,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:26:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:42,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 23:26:42,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:26:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-03-30 23:26:42,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:26:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-03-30 23:26:43,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889767691] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:26:43,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:26:43,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2023-03-30 23:26:43,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305331700] [2023-03-30 23:26:43,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:26:43,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:26:43,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:43,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:26:43,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:26:43,358 INFO L87 Difference]: Start difference. First operand 20321 states and 28327 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:26:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:26:48,005 INFO L93 Difference]: Finished difference Result 60839 states and 88940 transitions. [2023-03-30 23:26:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:26:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 207 [2023-03-30 23:26:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:26:48,170 INFO L225 Difference]: With dead ends: 60839 [2023-03-30 23:26:48,171 INFO L226 Difference]: Without dead ends: 40524 [2023-03-30 23:26:48,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 412 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:26:48,234 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1966 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 4102 mSolverCounterSat, 1404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 5506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1404 IncrementalHoareTripleChecker+Valid, 4102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:26:48,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1966 Valid, 636 Invalid, 5506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1404 Valid, 4102 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-30 23:26:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40524 states. [2023-03-30 23:26:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40524 to 40523. [2023-03-30 23:26:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40523 states, 39580 states have (on average 1.2014401212733703) internal successors, (47553), 39761 states have internal predecessors, (47553), 194 states have call successors, (194), 194 states have call predecessors, (194), 748 states have return successors, (7487), 567 states have call predecessors, (7487), 193 states have call successors, (7487) [2023-03-30 23:26:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40523 states to 40523 states and 55234 transitions. [2023-03-30 23:26:49,269 INFO L78 Accepts]: Start accepts. Automaton has 40523 states and 55234 transitions. Word has length 207 [2023-03-30 23:26:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:26:49,270 INFO L495 AbstractCegarLoop]: Abstraction has 40523 states and 55234 transitions. [2023-03-30 23:26:49,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:26:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 40523 states and 55234 transitions. [2023-03-30 23:26:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-03-30 23:26:49,274 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:49,274 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:26:49,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:26:49,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:26:49,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:49,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:49,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1929064072, now seen corresponding path program 1 times [2023-03-30 23:26:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:49,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668682538] [2023-03-30 23:26:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:49,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:49,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:49,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:26:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:49,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-03-30 23:26:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:26:49,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:49,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668682538] [2023-03-30 23:26:49,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668682538] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:26:49,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55394515] [2023-03-30 23:26:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:49,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:26:49,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:26:49,832 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) [2023-03-30 23:26:49,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:26:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:49,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:26:49,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:26:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:26:50,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:26:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:26:50,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55394515] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:26:50,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:26:50,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2023-03-30 23:26:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560382832] [2023-03-30 23:26:50,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:26:50,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-30 23:26:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-30 23:26:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:26:50,323 INFO L87 Difference]: Start difference. First operand 40523 states and 55234 transitions. Second operand has 9 states, 9 states have (on average 35.333333333333336) internal successors, (318), 7 states have internal predecessors, (318), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)