/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/Problem17_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:40:04,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:40:04,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:40:04,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:40:04,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:40:04,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:40:04,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:40:04,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:40:05,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:40:05,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:40:05,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:40:05,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:40:05,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:40:05,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:40:05,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:40:05,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:40:05,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:40:05,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:40:05,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:40:05,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:40:05,031 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 23:40:05,055 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:40:05,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:40:05,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:40:05,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:40:05,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:40:05,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:40:05,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:40:05,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:40:05,058 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:40:05,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:40:05,058 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:40:05,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:40:05,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:40:05,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:40:05,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:40:05,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:40:05,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:40:05,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:40:05,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:40:05,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:40:05,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:40:05,060 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:40:05,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:40:05,061 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:40:05,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:40:05,061 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:40:05,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:40:05,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:40:05,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:40:05,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:40:05,246 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:40:05,247 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:40:05,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label21.c [2023-03-30 23:40:06,376 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:40:06,678 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:40:06,679 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label21.c [2023-03-30 23:40:06,694 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f2782e02/14e890d2f0344e19893a5e81cde83dd4/FLAG28fc48b9f [2023-03-30 23:40:06,705 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f2782e02/14e890d2f0344e19893a5e81cde83dd4 [2023-03-30 23:40:06,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:40:06,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:40:06,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:40:06,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:40:06,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:40:06,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:40:06" (1/1) ... [2023-03-30 23:40:06,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6623c7f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:06, skipping insertion in model container [2023-03-30 23:40:06,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:40:06" (1/1) ... [2023-03-30 23:40:06,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:40:06,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:40:06,966 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/Problem17_label21.c[8748,8761] [2023-03-30 23:40:07,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:40:07,298 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:40:07,320 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/Problem17_label21.c[8748,8761] [2023-03-30 23:40:07,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:40:07,501 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:40:07,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07 WrapperNode [2023-03-30 23:40:07,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:40:07,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:40:07,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:40:07,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:40:07,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (1/1) ... [2023-03-30 23:40:07,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (1/1) ... [2023-03-30 23:40:07,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (1/1) ... [2023-03-30 23:40:07,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (1/1) ... [2023-03-30 23:40:07,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (1/1) ... [2023-03-30 23:40:07,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (1/1) ... [2023-03-30 23:40:07,631 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (1/1) ... [2023-03-30 23:40:07,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (1/1) ... [2023-03-30 23:40:07,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:40:07,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:40:07,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:40:07,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:40:07,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (1/1) ... [2023-03-30 23:40:07,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:40:07,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:40:07,721 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 23:40:07,738 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 23:40:07,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:40:07,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:40:07,750 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:40:07,750 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:40:07,750 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:40:07,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:40:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:40:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:40:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:40:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:40:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:40:07,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:40:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:40:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:40:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:40:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:40:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:40:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:40:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:40:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:40:07,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:40:07,818 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:40:07,819 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:40:10,064 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:40:10,071 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:40:10,071 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:40:10,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:40:10 BoogieIcfgContainer [2023-03-30 23:40:10,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:40:10,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:40:10,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:40:10,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:40:10,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:40:06" (1/3) ... [2023-03-30 23:40:10,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52897662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:40:10, skipping insertion in model container [2023-03-30 23:40:10,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:40:07" (2/3) ... [2023-03-30 23:40:10,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52897662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:40:10, skipping insertion in model container [2023-03-30 23:40:10,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:40:10" (3/3) ... [2023-03-30 23:40:10,078 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label21.c [2023-03-30 23:40:10,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:40:10,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:40:10,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:40:10,128 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;@215ae358, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:40:10,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:40:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 23:40:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-30 23:40:10,139 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:40:10,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:40:10,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:40:10,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:40:10,143 INFO L85 PathProgramCache]: Analyzing trace with hash -510335366, now seen corresponding path program 1 times [2023-03-30 23:40:10,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:40:10,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195111088] [2023-03-30 23:40:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:10,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:40:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:10,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:40:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:10,530 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 23:40:10,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:40:10,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195111088] [2023-03-30 23:40:10,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195111088] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:40:10,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:40:10,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:40:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201893459] [2023-03-30 23:40:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:40:10,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:40:10,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:40:10,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:40:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:40:10,555 INFO L87 Difference]: Start difference. First operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 23:40:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:40:13,622 INFO L93 Difference]: Finished difference Result 1692 states and 3091 transitions. [2023-03-30 23:40:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:40:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 65 [2023-03-30 23:40:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:40:13,637 INFO L225 Difference]: With dead ends: 1692 [2023-03-30 23:40:13,637 INFO L226 Difference]: Without dead ends: 1012 [2023-03-30 23:40:13,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:40:13,647 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1439 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:40:13,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 135 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:40:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-03-30 23:40:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1002. [2023-03-30 23:40:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 986 states have (on average 1.5446247464503042) internal successors, (1523), 988 states have internal predecessors, (1523), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2023-03-30 23:40:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1542 transitions. [2023-03-30 23:40:13,721 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1542 transitions. Word has length 65 [2023-03-30 23:40:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:40:13,722 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1542 transitions. [2023-03-30 23:40:13,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 23:40:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1542 transitions. [2023-03-30 23:40:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-03-30 23:40:13,725 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:40:13,726 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, 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 23:40:13,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:40:13,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:40:13,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:40:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1845493247, now seen corresponding path program 1 times [2023-03-30 23:40:13,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:40:13,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766625637] [2023-03-30 23:40:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:13,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:40:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:13,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:40:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:13,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:40:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:40:14,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:40:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766625637] [2023-03-30 23:40:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766625637] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:40:14,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:40:14,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:40:14,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034216682] [2023-03-30 23:40:14,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:40:14,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:40:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:40:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:40:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:40:14,095 INFO L87 Difference]: Start difference. First operand 1002 states and 1542 transitions. Second operand has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 4 states have internal predecessors, (130), 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) [2023-03-30 23:40:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:40:17,712 INFO L93 Difference]: Finished difference Result 2962 states and 4571 transitions. [2023-03-30 23:40:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:40:17,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 4 states have internal predecessors, (130), 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 136 [2023-03-30 23:40:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:40:17,718 INFO L225 Difference]: With dead ends: 2962 [2023-03-30 23:40:17,719 INFO L226 Difference]: Without dead ends: 1966 [2023-03-30 23:40:17,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:40:17,727 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1610 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 3480 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 4245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 3480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:40:17,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 332 Invalid, 4245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 3480 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-30 23:40:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2023-03-30 23:40:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1914. [2023-03-30 23:40:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1880 states have (on average 1.2920212765957446) internal successors, (2429), 1888 states have internal predecessors, (2429), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (43), 15 states have call predecessors, (43), 9 states have call successors, (43) [2023-03-30 23:40:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2482 transitions. [2023-03-30 23:40:17,795 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2482 transitions. Word has length 136 [2023-03-30 23:40:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:40:17,796 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 2482 transitions. [2023-03-30 23:40:17,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 4 states have internal predecessors, (130), 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) [2023-03-30 23:40:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2482 transitions. [2023-03-30 23:40:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-03-30 23:40:17,805 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:40:17,805 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, 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] [2023-03-30 23:40:17,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:40:17,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:40:17,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:40:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash -578112915, now seen corresponding path program 1 times [2023-03-30 23:40:17,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:40:17,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743589157] [2023-03-30 23:40:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:17,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:40:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:17,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:40:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:18,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:40:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:40:18,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:40:18,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743589157] [2023-03-30 23:40:18,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743589157] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:40:18,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621649831] [2023-03-30 23:40:18,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:18,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:40:18,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:40:18,049 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 23:40:18,080 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 23:40:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:18,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:40:18,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:40:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:40:19,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:40:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:40:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621649831] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:40:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:40:20,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2023-03-30 23:40:20,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405106237] [2023-03-30 23:40:20,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:40:20,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:40:20,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:40:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:40:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:40:20,759 INFO L87 Difference]: Start difference. First operand 1914 states and 2482 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 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) [2023-03-30 23:40:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:40:24,528 INFO L93 Difference]: Finished difference Result 7458 states and 9831 transitions. [2023-03-30 23:40:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:40:24,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 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 139 [2023-03-30 23:40:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:40:24,544 INFO L225 Difference]: With dead ends: 7458 [2023-03-30 23:40:24,544 INFO L226 Difference]: Without dead ends: 5550 [2023-03-30 23:40:24,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:40:24,548 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1898 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 1661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 4321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1661 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:40:24,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1898 Valid, 247 Invalid, 4321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1661 Valid, 2660 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-03-30 23:40:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2023-03-30 23:40:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5063. [2023-03-30 23:40:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5063 states, 4969 states have (on average 1.285570537331455) internal successors, (6388), 4995 states have internal predecessors, (6388), 24 states have call successors, (24), 24 states have call predecessors, (24), 69 states have return successors, (253), 43 states have call predecessors, (253), 23 states have call successors, (253) [2023-03-30 23:40:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 6665 transitions. [2023-03-30 23:40:24,643 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 6665 transitions. Word has length 139 [2023-03-30 23:40:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:40:24,644 INFO L495 AbstractCegarLoop]: Abstraction has 5063 states and 6665 transitions. [2023-03-30 23:40:24,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 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) [2023-03-30 23:40:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 6665 transitions. [2023-03-30 23:40:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-03-30 23:40:24,646 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:40:24,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 23:40:24,667 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 23:40:24,851 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 [2023-03-30 23:40:24,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:40:24,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:40:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash -735708094, now seen corresponding path program 1 times [2023-03-30 23:40:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:40:24,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219224489] [2023-03-30 23:40:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:40:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:25,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:40:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:25,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:40:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:40:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-03-30 23:40:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:40:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219224489] [2023-03-30 23:40:25,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219224489] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:40:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221012185] [2023-03-30 23:40:25,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:25,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:40:25,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:40:25,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:40:25,166 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 23:40:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:25,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:40:25,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:40:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-03-30 23:40:25,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:40:25,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221012185] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:40:25,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:40:25,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:40:25,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181274060] [2023-03-30 23:40:25,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:40:25,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:40:25,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:40:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:40:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:40:25,340 INFO L87 Difference]: Start difference. First operand 5063 states and 6665 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 23:40:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:40:27,099 INFO L93 Difference]: Finished difference Result 14072 states and 18908 transitions. [2023-03-30 23:40:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:40:27,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 227 [2023-03-30 23:40:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:40:27,124 INFO L225 Difference]: With dead ends: 14072 [2023-03-30 23:40:27,125 INFO L226 Difference]: Without dead ends: 9015 [2023-03-30 23:40:27,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:40:27,136 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 398 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:40:27,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 565 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:40:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9015 states. [2023-03-30 23:40:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9015 to 7277. [2023-03-30 23:40:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7277 states, 7142 states have (on average 1.2353682441893028) internal successors, (8823), 7179 states have internal predecessors, (8823), 34 states have call successors, (34), 34 states have call predecessors, (34), 100 states have return successors, (484), 63 states have call predecessors, (484), 33 states have call successors, (484) [2023-03-30 23:40:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7277 states to 7277 states and 9341 transitions. [2023-03-30 23:40:27,323 INFO L78 Accepts]: Start accepts. Automaton has 7277 states and 9341 transitions. Word has length 227 [2023-03-30 23:40:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:40:27,327 INFO L495 AbstractCegarLoop]: Abstraction has 7277 states and 9341 transitions. [2023-03-30 23:40:27,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 23:40:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 7277 states and 9341 transitions. [2023-03-30 23:40:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-03-30 23:40:27,330 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:40:27,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 23:40:27,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 23:40:27,534 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 [2023-03-30 23:40:27,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:40:27,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:40:27,535 INFO L85 PathProgramCache]: Analyzing trace with hash -632414944, now seen corresponding path program 1 times [2023-03-30 23:40:27,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:40:27,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279207590] [2023-03-30 23:40:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:27,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:40:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:40:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:27,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:40:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:27,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:40:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:40:27,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:40:27,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279207590] [2023-03-30 23:40:27,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279207590] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:40:27,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868712330] [2023-03-30 23:40:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:27,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:40:27,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:40:27,799 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) [2023-03-30 23:40:27,850 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 23:40:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:27,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:40:27,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:40:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:40:27,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:40:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:40:28,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868712330] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:40:28,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:40:28,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:40:28,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723431859] [2023-03-30 23:40:28,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:40:28,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:40:28,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:40:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:40:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:40:28,160 INFO L87 Difference]: Start difference. First operand 7277 states and 9341 transitions. Second operand has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 9 states have internal predecessors, (384), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:40:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:40:33,091 INFO L93 Difference]: Finished difference Result 18121 states and 24228 transitions. [2023-03-30 23:40:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-30 23:40:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 9 states have internal predecessors, (384), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 234 [2023-03-30 23:40:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:40:33,125 INFO L225 Difference]: With dead ends: 18121 [2023-03-30 23:40:33,125 INFO L226 Difference]: Without dead ends: 10850 [2023-03-30 23:40:33,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 473 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-03-30 23:40:33,138 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 4951 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 5550 mSolverCounterSat, 1551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4959 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 7101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1551 IncrementalHoareTripleChecker+Valid, 5550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:40:33,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4959 Valid, 333 Invalid, 7101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1551 Valid, 5550 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-03-30 23:40:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10850 states. [2023-03-30 23:40:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10850 to 9963. [2023-03-30 23:40:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9766 states have (on average 1.235101372107311) internal successors, (12062), 9824 states have internal predecessors, (12062), 46 states have call successors, (46), 46 states have call predecessors, (46), 150 states have return successors, (795), 92 states have call predecessors, (795), 45 states have call successors, (795) [2023-03-30 23:40:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 12903 transitions. [2023-03-30 23:40:33,364 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 12903 transitions. Word has length 234 [2023-03-30 23:40:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:40:33,365 INFO L495 AbstractCegarLoop]: Abstraction has 9963 states and 12903 transitions. [2023-03-30 23:40:33,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 9 states have internal predecessors, (384), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:40:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 12903 transitions. [2023-03-30 23:40:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-03-30 23:40:33,370 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:40:33,370 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, 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, 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 23:40:33,397 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 23:40:33,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:40:33,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:40:33,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:40:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1350585826, now seen corresponding path program 1 times [2023-03-30 23:40:33,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:40:33,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552178944] [2023-03-30 23:40:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:33,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:40:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:33,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:40:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:33,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:40:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:33,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:40:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:33,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-03-30 23:40:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 346 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-03-30 23:40:34,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:40:34,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552178944] [2023-03-30 23:40:34,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552178944] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:40:34,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464646824] [2023-03-30 23:40:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:34,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:40:34,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:40:34,057 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 23:40:34,059 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 23:40:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:34,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:40:34,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:40:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 348 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-03-30 23:40:34,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:40:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 348 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-03-30 23:40:34,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464646824] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:40:34,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:40:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2023-03-30 23:40:34,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333529493] [2023-03-30 23:40:34,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:40:34,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-30 23:40:34,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:40:34,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-30 23:40:34,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:40:34,613 INFO L87 Difference]: Start difference. First operand 9963 states and 12903 transitions. Second operand has 9 states, 9 states have (on average 47.888888888888886) internal successors, (431), 7 states have internal predecessors, (431), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 23:40:39,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:40:39,138 INFO L93 Difference]: Finished difference Result 25570 states and 35197 transitions. [2023-03-30 23:40:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:40:39,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 47.888888888888886) internal successors, (431), 7 states have internal predecessors, (431), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 336 [2023-03-30 23:40:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:40:39,185 INFO L225 Difference]: With dead ends: 25570 [2023-03-30 23:40:39,185 INFO L226 Difference]: Without dead ends: 13796 [2023-03-30 23:40:39,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 681 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:40:39,205 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 1774 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4171 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 5006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 4171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:40:39,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1780 Valid, 357 Invalid, 5006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 4171 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-30 23:40:39,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13796 states. [2023-03-30 23:40:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13796 to 13644. [2023-03-30 23:40:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13315 states have (on average 1.145324821629741) internal successors, (15250), 13437 states have internal predecessors, (15250), 62 states have call successors, (62), 62 states have call predecessors, (62), 266 states have return successors, (1425), 144 states have call predecessors, (1425), 61 states have call successors, (1425) [2023-03-30 23:40:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 16737 transitions. [2023-03-30 23:40:39,435 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 16737 transitions. Word has length 336 [2023-03-30 23:40:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:40:39,436 INFO L495 AbstractCegarLoop]: Abstraction has 13644 states and 16737 transitions. [2023-03-30 23:40:39,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 47.888888888888886) internal successors, (431), 7 states have internal predecessors, (431), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 23:40:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 16737 transitions. [2023-03-30 23:40:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-03-30 23:40:39,441 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:40:39,441 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2023-03-30 23:40:39,448 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 23:40:39,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:40:39,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:40:39,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:40:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1291023127, now seen corresponding path program 1 times [2023-03-30 23:40:39,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:40:39,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217414240] [2023-03-30 23:40:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:40:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:39,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:40:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:39,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:40:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:39,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:40:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-30 23:40:40,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:40:40,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217414240] [2023-03-30 23:40:40,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217414240] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:40:40,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263080973] [2023-03-30 23:40:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:40,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:40:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:40:40,046 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 23:40:40,047 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 23:40:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:40,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:40:40,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:40:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-30 23:40:40,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:40:40,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263080973] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:40:40,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:40:40,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:40:40,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935087004] [2023-03-30 23:40:40,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:40:40,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:40:40,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:40:40,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:40:40,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:40:40,215 INFO L87 Difference]: Start difference. First operand 13644 states and 16737 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 23:40:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:40:41,956 INFO L93 Difference]: Finished difference Result 35242 states and 44623 transitions. [2023-03-30 23:40:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:40:41,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 350 [2023-03-30 23:40:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:40:42,010 INFO L225 Difference]: With dead ends: 35242 [2023-03-30 23:40:42,010 INFO L226 Difference]: Without dead ends: 21604 [2023-03-30 23:40:42,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 355 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:40:42,028 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 429 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:40:42,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 423 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 23:40:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21604 states. [2023-03-30 23:40:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21604 to 18528. [2023-03-30 23:40:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18528 states, 18100 states have (on average 1.1449723756906078) internal successors, (20724), 18262 states have internal predecessors, (20724), 84 states have call successors, (84), 84 states have call predecessors, (84), 343 states have return successors, (2460), 181 states have call predecessors, (2460), 83 states have call successors, (2460) [2023-03-30 23:40:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18528 states to 18528 states and 23268 transitions. [2023-03-30 23:40:42,317 INFO L78 Accepts]: Start accepts. Automaton has 18528 states and 23268 transitions. Word has length 350 [2023-03-30 23:40:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:40:42,318 INFO L495 AbstractCegarLoop]: Abstraction has 18528 states and 23268 transitions. [2023-03-30 23:40:42,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 23:40:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 18528 states and 23268 transitions. [2023-03-30 23:40:42,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2023-03-30 23:40:42,326 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:40:42,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:40:42,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:40:42,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:40:42,532 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:40:42,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:40:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2100038191, now seen corresponding path program 1 times [2023-03-30 23:40:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:40:42,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095643156] [2023-03-30 23:40:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:42,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:40:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:43,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:40:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:43,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:40:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:43,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:40:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-30 23:40:43,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:40:43,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095643156] [2023-03-30 23:40:43,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095643156] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:40:43,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281239126] [2023-03-30 23:40:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:40:43,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:40:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:40:43,447 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) [2023-03-30 23:40:43,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:40:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:40:43,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-30 23:40:43,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:40:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-30 23:40:44,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:40:44,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281239126] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:40:44,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:40:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-03-30 23:40:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569953057] [2023-03-30 23:40:44,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 23:40:44,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:40:44,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:40:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:40:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:40:44,711 INFO L87 Difference]: Start difference. First operand 18528 states and 23268 transitions. Second operand has 11 states, 11 states have (on average 51.18181818181818) internal successors, (563), 8 states have internal predecessors, (563), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 23:40:47,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:49,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:53,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:55,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:57,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:41:00,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:41:02,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:41:04,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:41:06,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:41:09,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:41:12,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]