/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:47:04,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:47:04,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:47:04,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:47:04,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 22:47:04,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 22:47:04,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 22:47:04,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 22:47:04,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 22:47:04,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 22:47:04,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 22:47:04,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 22:47:04,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:47:04,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:47:04,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:47:04,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:47:04,895 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:47:04,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:47:04,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:47:04,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:47:04,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:47:04,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:47:04,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:47:04,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:47:04,897 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:47:04,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:47:04,898 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:47:04,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:47:04,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:47:04,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:47:04,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:47:04,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:47:04,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:47:04,899 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:47:04,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:47:04,899 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:47:04,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:47:04,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:47:04,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:47:04,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:47:04,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:47:04,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:47:04,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:47:04,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:47:04,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:47:04,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:47:04,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:47:04,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:47:04,901 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:47:04,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:47:04,901 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:47:04,901 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:47:05,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:47:05,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:47:05,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:47:05,159 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:47:05,160 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:47:05,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label44.c [2023-04-01 22:47:06,269 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:47:06,708 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:47:06,708 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label44.c [2023-04-01 22:47:06,736 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27ab04da/69d6f88a8fda4ebaa6bcf50fd26a480e/FLAG5622f5270 [2023-04-01 22:47:06,750 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27ab04da/69d6f88a8fda4ebaa6bcf50fd26a480e [2023-04-01 22:47:06,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:47:06,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:47:06,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:47:06,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:47:06,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:47:06,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:47:06" (1/1) ... [2023-04-01 22:47:06,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32466afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:06, skipping insertion in model container [2023-04-01 22:47:06,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:47:06" (1/1) ... [2023-04-01 22:47:06,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:47:06,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:47:07,120 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label44.c[4499,4512] [2023-04-01 22:47:07,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:47:07,868 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:47:07,895 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label44.c[4499,4512] [2023-04-01 22:47:08,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:47:08,368 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:47:08,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08 WrapperNode [2023-04-01 22:47:08,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:47:08,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:47:08,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:47:08,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:47:08,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (1/1) ... [2023-04-01 22:47:08,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (1/1) ... [2023-04-01 22:47:08,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (1/1) ... [2023-04-01 22:47:08,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (1/1) ... [2023-04-01 22:47:08,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (1/1) ... [2023-04-01 22:47:08,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (1/1) ... [2023-04-01 22:47:08,604 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (1/1) ... [2023-04-01 22:47:08,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (1/1) ... [2023-04-01 22:47:08,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:47:08,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:47:08,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:47:08,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:47:08,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (1/1) ... [2023-04-01 22:47:08,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:47:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:08,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:47:08,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:47:08,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:47:08,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:47:08,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:47:08,724 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:47:08,724 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:47:08,724 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:47:08,724 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:47:08,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:47:08,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:47:08,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:47:08,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:47:08,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:47:08,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:47:08,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:47:08,811 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:47:08,814 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:47:13,471 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:47:13,484 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:47:13,484 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:47:13,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:47:13 BoogieIcfgContainer [2023-04-01 22:47:13,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:47:13,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:47:13,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:47:13,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:47:13,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:47:06" (1/3) ... [2023-04-01 22:47:13,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d94e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:47:13, skipping insertion in model container [2023-04-01 22:47:13,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:08" (2/3) ... [2023-04-01 22:47:13,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d94e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:47:13, skipping insertion in model container [2023-04-01 22:47:13,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:47:13" (3/3) ... [2023-04-01 22:47:13,494 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label44.c [2023-04-01 22:47:13,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:47:13,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:47:13,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:47:13,576 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;@4c040857, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:47:13,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:47:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 22:47:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 22:47:13,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:13,592 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] [2023-04-01 22:47:13,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:13,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:13,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1582712439, now seen corresponding path program 1 times [2023-04-01 22:47:13,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:13,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538284348] [2023-04-01 22:47:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:13,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:14,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:14,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:14,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538284348] [2023-04-01 22:47:14,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538284348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:14,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:47:14,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:47:14,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177598492] [2023-04-01 22:47:14,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:14,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:47:14,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:14,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:47:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:47:14,143 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:47:20,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:20,413 INFO L93 Difference]: Finished difference Result 3230 states and 5909 transitions. [2023-04-01 22:47:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:47:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 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 36 [2023-04-01 22:47:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:20,437 INFO L225 Difference]: With dead ends: 3230 [2023-04-01 22:47:20,437 INFO L226 Difference]: Without dead ends: 2026 [2023-04-01 22:47:20,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:47:20,449 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 3029 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3029 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 4486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:20,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3029 Valid, 300 Invalid, 5089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 22:47:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2023-04-01 22:47:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2009. [2023-04-01 22:47:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1981 states have (on average 1.6436143361938416) internal successors, (3256), 1983 states have internal predecessors, (3256), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-04-01 22:47:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3291 transitions. [2023-04-01 22:47:20,573 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3291 transitions. Word has length 36 [2023-04-01 22:47:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:20,574 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 3291 transitions. [2023-04-01 22:47:20,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:47:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3291 transitions. [2023-04-01 22:47:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 22:47:20,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:20,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:47:20,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:47:20,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:20,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:20,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1994918237, now seen corresponding path program 1 times [2023-04-01 22:47:20,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:20,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808354623] [2023-04-01 22:47:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:20,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:20,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:20,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:21,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:21,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808354623] [2023-04-01 22:47:21,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808354623] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:21,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:47:21,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:47:21,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749810510] [2023-04-01 22:47:21,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:21,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:47:21,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:21,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:47:21,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:47:21,143 INFO L87 Difference]: Start difference. First operand 2009 states and 3291 transitions. Second operand has 7 states, 6 states have (on average 17.5) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:28,715 INFO L93 Difference]: Finished difference Result 5863 states and 9700 transitions. [2023-04-01 22:47:28,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:47:28,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.5) internal successors, (105), 4 states have internal predecessors, (105), 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 111 [2023-04-01 22:47:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:28,732 INFO L225 Difference]: With dead ends: 5863 [2023-04-01 22:47:28,733 INFO L226 Difference]: Without dead ends: 3860 [2023-04-01 22:47:28,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:47:28,738 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 3296 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 7739 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 8924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 7739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:28,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3296 Valid, 815 Invalid, 8924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 7739 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 22:47:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2023-04-01 22:47:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3760. [2023-04-01 22:47:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3760 states, 3688 states have (on average 1.4899674620390455) internal successors, (5495), 3700 states have internal predecessors, (5495), 18 states have call successors, (18), 18 states have call predecessors, (18), 53 states have return successors, (117), 41 states have call predecessors, (117), 17 states have call successors, (117) [2023-04-01 22:47:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 5630 transitions. [2023-04-01 22:47:28,843 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 5630 transitions. Word has length 111 [2023-04-01 22:47:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:28,844 INFO L495 AbstractCegarLoop]: Abstraction has 3760 states and 5630 transitions. [2023-04-01 22:47:28,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.5) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 5630 transitions. [2023-04-01 22:47:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 22:47:28,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:28,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:47:28,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:47:28,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:28,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1196111679, now seen corresponding path program 1 times [2023-04-01 22:47:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:28,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68752275] [2023-04-01 22:47:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:29,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68752275] [2023-04-01 22:47:29,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68752275] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:29,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:47:29,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:47:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767289400] [2023-04-01 22:47:29,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:29,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:47:29,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:29,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:47:29,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:47:29,220 INFO L87 Difference]: Start difference. First operand 3760 states and 5630 transitions. Second operand has 8 states, 7 states have (on average 17.0) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:37,448 INFO L93 Difference]: Finished difference Result 14591 states and 22901 transitions. [2023-04-01 22:47:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:47:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 5 states have internal predecessors, (119), 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 125 [2023-04-01 22:47:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:37,535 INFO L225 Difference]: With dead ends: 14591 [2023-04-01 22:47:37,535 INFO L226 Difference]: Without dead ends: 10837 [2023-04-01 22:47:37,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:47:37,550 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 4930 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 8284 mSolverCounterSat, 1969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4930 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 10253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1969 IncrementalHoareTripleChecker+Valid, 8284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:37,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4930 Valid, 813 Invalid, 10253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1969 Valid, 8284 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-04-01 22:47:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10837 states. [2023-04-01 22:47:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 10751. [2023-04-01 22:47:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10751 states, 10420 states have (on average 1.343186180422265) internal successors, (13996), 10488 states have internal predecessors, (13996), 50 states have call successors, (50), 50 states have call predecessors, (50), 280 states have return successors, (1257), 212 states have call predecessors, (1257), 49 states have call successors, (1257) [2023-04-01 22:47:37,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 15303 transitions. [2023-04-01 22:47:37,850 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 15303 transitions. Word has length 125 [2023-04-01 22:47:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:37,852 INFO L495 AbstractCegarLoop]: Abstraction has 10751 states and 15303 transitions. [2023-04-01 22:47:37,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 15303 transitions. [2023-04-01 22:47:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 22:47:37,856 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:37,856 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:47:37,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:47:37,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:37,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1894259361, now seen corresponding path program 1 times [2023-04-01 22:47:37,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:37,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181625599] [2023-04-01 22:47:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:38,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:38,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:38,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-04-01 22:47:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 58 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 22:47:38,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181625599] [2023-04-01 22:47:38,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181625599] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409758751] [2023-04-01 22:47:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:38,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:38,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:38,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:38,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:47:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:38,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 22:47:38,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 22:47:38,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:47:38,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409758751] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:38,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:47:38,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-04-01 22:47:38,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651034629] [2023-04-01 22:47:38,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:38,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:47:38,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:47:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:47:38,626 INFO L87 Difference]: Start difference. First operand 10751 states and 15303 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:42,978 INFO L93 Difference]: Finished difference Result 31816 states and 47933 transitions. [2023-04-01 22:47:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 22:47:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 230 [2023-04-01 22:47:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:43,069 INFO L225 Difference]: With dead ends: 31816 [2023-04-01 22:47:43,069 INFO L226 Difference]: Without dead ends: 21071 [2023-04-01 22:47:43,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:47:43,116 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 3172 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4290 mSolverCounterSat, 1519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3172 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 5809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1519 IncrementalHoareTripleChecker+Valid, 4290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:43,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3172 Valid, 679 Invalid, 5809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1519 Valid, 4290 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 22:47:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21071 states. [2023-04-01 22:47:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21071 to 20984. [2023-04-01 22:47:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20984 states, 20324 states have (on average 1.23002361739815) internal successors, (24999), 20478 states have internal predecessors, (24999), 98 states have call successors, (98), 98 states have call predecessors, (98), 561 states have return successors, (3206), 407 states have call predecessors, (3206), 97 states have call successors, (3206) [2023-04-01 22:47:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20984 states to 20984 states and 28303 transitions. [2023-04-01 22:47:43,705 INFO L78 Accepts]: Start accepts. Automaton has 20984 states and 28303 transitions. Word has length 230 [2023-04-01 22:47:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:43,707 INFO L495 AbstractCegarLoop]: Abstraction has 20984 states and 28303 transitions. [2023-04-01 22:47:43,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 20984 states and 28303 transitions. [2023-04-01 22:47:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-04-01 22:47:43,713 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:43,714 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:47:43,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:47:43,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:43,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:43,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 916914886, now seen corresponding path program 1 times [2023-04-01 22:47:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:43,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437898040] [2023-04-01 22:47:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:44,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:44,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:44,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:47:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:47:44,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:44,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437898040] [2023-04-01 22:47:44,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437898040] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:44,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902413637] [2023-04-01 22:47:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:44,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:44,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:44,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:44,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:47:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:44,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 22:47:44,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-04-01 22:47:44,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:47:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 32 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:45,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902413637] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:47:45,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:47:45,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2023-04-01 22:47:45,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605852802] [2023-04-01 22:47:45,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:47:45,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 22:47:45,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:45,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 22:47:45,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-04-01 22:47:45,764 INFO L87 Difference]: Start difference. First operand 20984 states and 28303 transitions. Second operand has 20 states, 20 states have (on average 33.8) internal successors, (676), 18 states have internal predecessors, (676), 9 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 22:48:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:48:30,088 INFO L93 Difference]: Finished difference Result 160601 states and 278294 transitions. [2023-04-01 22:48:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-04-01 22:48:30,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 33.8) internal successors, (676), 18 states have internal predecessors, (676), 9 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 265 [2023-04-01 22:48:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:48:30,939 INFO L225 Difference]: With dead ends: 160601 [2023-04-01 22:48:30,939 INFO L226 Difference]: Without dead ends: 139623 [2023-04-01 22:48:31,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13566 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4492, Invalid=27370, Unknown=0, NotChecked=0, Total=31862 [2023-04-01 22:48:31,064 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 32168 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 50099 mSolverCounterSat, 12076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32179 SdHoareTripleChecker+Valid, 2453 SdHoareTripleChecker+Invalid, 62175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 12076 IncrementalHoareTripleChecker+Valid, 50099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:48:31,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32179 Valid, 2453 Invalid, 62175 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [12076 Valid, 50099 Invalid, 0 Unknown, 0 Unchecked, 38.1s Time] [2023-04-01 22:48:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139623 states. [2023-04-01 22:48:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139623 to 122152. [2023-04-01 22:48:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122152 states, 119252 states have (on average 1.137884479924865) internal successors, (135695), 119988 states have internal predecessors, (135695), 586 states have call successors, (586), 586 states have call predecessors, (586), 2313 states have return successors, (26731), 1577 states have call predecessors, (26731), 585 states have call successors, (26731) [2023-04-01 22:48:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122152 states to 122152 states and 163012 transitions. [2023-04-01 22:48:35,661 INFO L78 Accepts]: Start accepts. Automaton has 122152 states and 163012 transitions. Word has length 265 [2023-04-01 22:48:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:48:35,662 INFO L495 AbstractCegarLoop]: Abstraction has 122152 states and 163012 transitions. [2023-04-01 22:48:35,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 33.8) internal successors, (676), 18 states have internal predecessors, (676), 9 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 22:48:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 122152 states and 163012 transitions. [2023-04-01 22:48:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-04-01 22:48:35,670 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:35,670 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:48:35,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:48:35,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:35,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:35,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1950586755, now seen corresponding path program 1 times [2023-04-01 22:48:35,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:35,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143137404] [2023-04-01 22:48:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:35,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:36,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:36,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:48:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:36,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:48:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:36,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:48:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 87 proven. 142 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 22:48:36,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:36,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143137404] [2023-04-01 22:48:36,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143137404] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:48:36,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086169939] [2023-04-01 22:48:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:36,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:48:36,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:48:36,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:48:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:37,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:48:37,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:48:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-04-01 22:48:37,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:48:37,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086169939] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:48:37,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:48:37,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 22:48:37,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398232078] [2023-04-01 22:48:37,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:48:37,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:48:37,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:37,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:48:37,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:48:37,495 INFO L87 Difference]: Start difference. First operand 122152 states and 163012 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:48:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:48:43,669 INFO L93 Difference]: Finished difference Result 250553 states and 335713 transitions. [2023-04-01 22:48:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 22:48:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 281 [2023-04-01 22:48:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:48:44,217 INFO L225 Difference]: With dead ends: 250553 [2023-04-01 22:48:44,217 INFO L226 Difference]: Without dead ends: 129210 [2023-04-01 22:48:44,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:48:44,343 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 2688 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 5150 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2688 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 6026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 5150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:48:44,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2688 Valid, 563 Invalid, 6026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 5150 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 22:48:44,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129210 states. [2023-04-01 22:48:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129210 to 127322. [2023-04-01 22:48:46,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127322 states, 124235 states have (on average 1.1321205779369743) internal successors, (140649), 125042 states have internal predecessors, (140649), 610 states have call successors, (610), 610 states have call predecessors, (610), 2476 states have return successors, (28567), 1669 states have call predecessors, (28567), 609 states have call successors, (28567) [2023-04-01 22:48:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127322 states to 127322 states and 169826 transitions. [2023-04-01 22:48:47,338 INFO L78 Accepts]: Start accepts. Automaton has 127322 states and 169826 transitions. Word has length 281 [2023-04-01 22:48:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:48:47,338 INFO L495 AbstractCegarLoop]: Abstraction has 127322 states and 169826 transitions. [2023-04-01 22:48:47,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:48:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 127322 states and 169826 transitions. [2023-04-01 22:48:47,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-04-01 22:48:47,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:47,347 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:48:47,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:48:47,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:47,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:47,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash 494055742, now seen corresponding path program 1 times [2023-04-01 22:48:47,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:47,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499505085] [2023-04-01 22:48:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:47,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:48,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:48,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:48:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:48,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:48:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 59 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:48:48,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:48,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499505085] [2023-04-01 22:48:48,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499505085] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:48:48,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71476688] [2023-04-01 22:48:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:48,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:48,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:48:48,782 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:48:48,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:48:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:48,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:48:48,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:48:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 22:48:49,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:48:49,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71476688] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:48:49,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:48:49,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2023-04-01 22:48:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658897935] [2023-04-01 22:48:49,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:48:49,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:48:49,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:49,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:48:49,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:48:49,137 INFO L87 Difference]: Start difference. First operand 127322 states and 169826 transitions. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:48:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:48:54,917 INFO L93 Difference]: Finished difference Result 219560 states and 293016 transitions. [2023-04-01 22:48:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:48:54,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 281 [2023-04-01 22:48:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:48:55,353 INFO L225 Difference]: With dead ends: 219560 [2023-04-01 22:48:55,353 INFO L226 Difference]: Without dead ends: 127630 [2023-04-01 22:48:55,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:48:55,552 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 2282 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 5729 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2282 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 5897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 5729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:48:55,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2282 Valid, 645 Invalid, 5897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 5729 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 22:48:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127630 states. [2023-04-01 22:48:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127630 to 127401. [2023-04-01 22:48:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127401 states, 124281 states have (on average 1.1320314448708975) internal successors, (140690), 125108 states have internal predecessors, (140690), 610 states have call successors, (610), 610 states have call predecessors, (610), 2509 states have return successors, (29047), 1682 states have call predecessors, (29047), 609 states have call successors, (29047) [2023-04-01 22:48:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127401 states to 127401 states and 170347 transitions. [2023-04-01 22:48:58,061 INFO L78 Accepts]: Start accepts. Automaton has 127401 states and 170347 transitions. Word has length 281 [2023-04-01 22:48:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:48:58,061 INFO L495 AbstractCegarLoop]: Abstraction has 127401 states and 170347 transitions. [2023-04-01 22:48:58,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:48:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 127401 states and 170347 transitions. [2023-04-01 22:48:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-04-01 22:48:58,066 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:58,066 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:48:58,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:48:58,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:58,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:58,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:58,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1456884233, now seen corresponding path program 1 times [2023-04-01 22:48:58,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:58,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231871819] [2023-04-01 22:48:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:58,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:48:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:48:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-04-01 22:48:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 165 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 22:48:58,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:58,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231871819] [2023-04-01 22:48:58,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231871819] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:48:58,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609609708] [2023-04-01 22:48:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:58,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:58,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:48:58,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:48:58,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:48:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:48:58,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:48:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-04-01 22:48:59,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:48:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 95 proven. 215 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:48:59,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609609708] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:48:59,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:48:59,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-04-01 22:48:59,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897430090] [2023-04-01 22:48:59,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:48:59,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 22:48:59,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 22:48:59,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 22:48:59,834 INFO L87 Difference]: Start difference. First operand 127401 states and 170347 transitions. Second operand has 17 states, 17 states have (on average 31.294117647058822) internal successors, (532), 15 states have internal predecessors, (532), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:49:33,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:33,674 INFO L93 Difference]: Finished difference Result 392864 states and 547662 transitions. [2023-04-01 22:49:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-04-01 22:49:33,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 31.294117647058822) internal successors, (532), 15 states have internal predecessors, (532), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 288 [2023-04-01 22:49:33,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:34,624 INFO L225 Difference]: With dead ends: 392864 [2023-04-01 22:49:34,624 INFO L226 Difference]: Without dead ends: 263796 [2023-04-01 22:49:34,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 702 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9493 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3167, Invalid=20703, Unknown=0, NotChecked=0, Total=23870 [2023-04-01 22:49:34,771 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 15199 mSDsluCounter, 2501 mSDsCounter, 0 mSdLazyCounter, 33612 mSolverCounterSat, 8765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15199 SdHoareTripleChecker+Valid, 2848 SdHoareTripleChecker+Invalid, 42377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8765 IncrementalHoareTripleChecker+Valid, 33612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:34,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15199 Valid, 2848 Invalid, 42377 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8765 Valid, 33612 Invalid, 0 Unknown, 0 Unchecked, 28.1s Time] [2023-04-01 22:49:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263796 states. [2023-04-01 22:49:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263796 to 245503. [2023-04-01 22:49:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245503 states, 240303 states have (on average 1.095508587075484) internal successors, (263254), 241601 states have internal predecessors, (263254), 1186 states have call successors, (1186), 1186 states have call predecessors, (1186), 4013 states have return successors, (47957), 2715 states have call predecessors, (47957), 1185 states have call successors, (47957) [2023-04-01 22:49:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245503 states to 245503 states and 312397 transitions. [2023-04-01 22:49:40,109 INFO L78 Accepts]: Start accepts. Automaton has 245503 states and 312397 transitions. Word has length 288 [2023-04-01 22:49:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:40,109 INFO L495 AbstractCegarLoop]: Abstraction has 245503 states and 312397 transitions. [2023-04-01 22:49:40,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 31.294117647058822) internal successors, (532), 15 states have internal predecessors, (532), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:49:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 245503 states and 312397 transitions. [2023-04-01 22:49:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2023-04-01 22:49:40,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:40,116 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:49:40,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:40,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:40,322 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:40,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:40,323 INFO L85 PathProgramCache]: Analyzing trace with hash -643967523, now seen corresponding path program 1 times [2023-04-01 22:49:40,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:40,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421152958] [2023-04-01 22:49:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:40,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:41,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:41,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:49:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:41,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2023-04-01 22:49:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 217 proven. 142 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:49:41,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:41,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421152958] [2023-04-01 22:49:41,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421152958] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:41,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795301023] [2023-04-01 22:49:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:41,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:41,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:41,565 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:41,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:49:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:41,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 22:49:41,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 22:49:44,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:49:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 92 proven. 270 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:49:48,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795301023] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:49:48,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:49:48,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-04-01 22:49:48,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88951774] [2023-04-01 22:49:48,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:49:48,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:49:48,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:49:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:49:48,607 INFO L87 Difference]: Start difference. First operand 245503 states and 312397 transitions. Second operand has 25 states, 25 states have (on average 41.48) internal successors, (1037), 23 states have internal predecessors, (1037), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11)