/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_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:24:41,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:24:41,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:24:41,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:24:41,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:24:41,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:24:41,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:24:41,238 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:24:41,265 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:24:41,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:24:41,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:24:41,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:24:41,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:24:41,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:24:41,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:24:41,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:24:41,267 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:24:41,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:24:41,267 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:24:41,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:24:41,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:24:41,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:24:41,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:24:41,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:24:41,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:24:41,268 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:24:41,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:24:41,268 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:24:41,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:24:41,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:24:41,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:24:41,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:24:41,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:24:41,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:24:41,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:24:41,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:24:41,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:24:41,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:24:41,271 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:24:41,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:24:41,272 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:24:41,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:24:41,272 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:24:41,272 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:24:41,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:24:41,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:24:41,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:24:41,489 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:24:41,491 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:24:41,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label31.c [2023-03-30 23:24:42,554 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:24:42,977 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:24:42,977 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label31.c [2023-03-30 23:24:43,006 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0bfb6381/e171517764284adaad0895dc50ecaa12/FLAGe57eb1784 [2023-03-30 23:24:43,020 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0bfb6381/e171517764284adaad0895dc50ecaa12 [2023-03-30 23:24:43,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:24:43,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:24:43,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:24:43,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:24:43,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:24:43,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:24:43" (1/1) ... [2023-03-30 23:24:43,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@754a6c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:43, skipping insertion in model container [2023-03-30 23:24:43,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:24:43" (1/1) ... [2023-03-30 23:24:43,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:24:43,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:24:43,384 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_label31.c[5792,5805] [2023-03-30 23:24:44,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:24:44,084 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:24:44,107 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_label31.c[5792,5805] [2023-03-30 23:24:44,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:24:44,447 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:24:44,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44 WrapperNode [2023-03-30 23:24:44,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:24:44,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:24:44,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:24:44,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:24:44,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (1/1) ... [2023-03-30 23:24:44,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (1/1) ... [2023-03-30 23:24:44,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (1/1) ... [2023-03-30 23:24:44,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (1/1) ... [2023-03-30 23:24:44,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (1/1) ... [2023-03-30 23:24:44,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (1/1) ... [2023-03-30 23:24:44,691 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (1/1) ... [2023-03-30 23:24:44,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (1/1) ... [2023-03-30 23:24:44,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:24:44,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:24:44,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:24:44,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:24:44,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (1/1) ... [2023-03-30 23:24:44,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:24:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:44,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:24:44,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:24:44,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:24:44,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:24:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:24:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:24:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:24:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:24:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:24:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:24:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:24:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:24:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:24:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:24:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:24:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:24:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:24:44,923 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:24:44,924 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:24:48,578 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:24:48,595 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:24:48,595 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:24:48,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:24:48 BoogieIcfgContainer [2023-03-30 23:24:48,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:24:48,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:24:48,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:24:48,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:24:48,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:24:43" (1/3) ... [2023-03-30 23:24:48,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386d2ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:24:48, skipping insertion in model container [2023-03-30 23:24:48,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:44" (2/3) ... [2023-03-30 23:24:48,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386d2ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:24:48, skipping insertion in model container [2023-03-30 23:24:48,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:24:48" (3/3) ... [2023-03-30 23:24:48,605 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label31.c [2023-03-30 23:24:48,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:24:48,620 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:24:48,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:24:48,700 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;@154ead2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:24:48,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:24:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 23:24:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-30 23:24:48,716 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:48,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:48,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:48,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:48,720 INFO L85 PathProgramCache]: Analyzing trace with hash 531734929, now seen corresponding path program 1 times [2023-03-30 23:24:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:48,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111249452] [2023-03-30 23:24:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:49,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:49,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:49,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111249452] [2023-03-30 23:24:49,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111249452] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:49,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:49,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:24:49,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265761325] [2023-03-30 23:24:49,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:49,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:24:49,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:49,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:24:49,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:24:49,158 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:24:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:56,763 INFO L93 Difference]: Finished difference Result 3977 states and 7430 transitions. [2023-03-30 23:24:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:24:56,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 46 [2023-03-30 23:24:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:56,790 INFO L225 Difference]: With dead ends: 3977 [2023-03-30 23:24:56,791 INFO L226 Difference]: Without dead ends: 2790 [2023-03-30 23:24:56,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:24:56,802 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 5692 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 5269 mSolverCounterSat, 2506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5692 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 7775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2506 IncrementalHoareTripleChecker+Valid, 5269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:56,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5692 Valid, 355 Invalid, 7775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2506 Valid, 5269 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-03-30 23:24:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-03-30 23:24:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2758. [2023-03-30 23:24:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2718 states have (on average 1.5997056659308315) internal successors, (4348), 2721 states have internal predecessors, (4348), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (53), 22 states have call predecessors, (53), 13 states have call successors, (53) [2023-03-30 23:24:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 4415 transitions. [2023-03-30 23:24:56,931 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 4415 transitions. Word has length 46 [2023-03-30 23:24:56,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:56,932 INFO L495 AbstractCegarLoop]: Abstraction has 2758 states and 4415 transitions. [2023-03-30 23:24:56,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:24:56,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 4415 transitions. [2023-03-30 23:24:56,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-03-30 23:24:56,936 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:56,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:56,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:24:56,937 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:56,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash 153397089, now seen corresponding path program 1 times [2023-03-30 23:24:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:56,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847138376] [2023-03-30 23:24:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:56,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:57,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:57,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:57,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:57,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847138376] [2023-03-30 23:24:57,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847138376] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:57,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:57,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:24:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768664882] [2023-03-30 23:24:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:57,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:24:57,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:57,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:24:57,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:24:57,327 INFO L87 Difference]: Start difference. First operand 2758 states and 4415 transitions. Second operand has 8 states, 7 states have (on average 21.285714285714285) internal successors, (149), 5 states have internal predecessors, (149), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:25:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:05,597 INFO L93 Difference]: Finished difference Result 10523 states and 17316 transitions. [2023-03-30 23:25:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:25:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.285714285714285) internal successors, (149), 5 states have internal predecessors, (149), 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 155 [2023-03-30 23:25:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:05,623 INFO L225 Difference]: With dead ends: 10523 [2023-03-30 23:25:05,623 INFO L226 Difference]: Without dead ends: 7771 [2023-03-30 23:25:05,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:25:05,631 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 4142 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 9974 mSolverCounterSat, 1776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4142 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 11750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1776 IncrementalHoareTripleChecker+Valid, 9974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:05,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4142 Valid, 802 Invalid, 11750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1776 Valid, 9974 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-03-30 23:25:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2023-03-30 23:25:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 7754. [2023-03-30 23:25:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7754 states, 7602 states have (on average 1.3727966324651408) internal successors, (10436), 7623 states have internal predecessors, (10436), 38 states have call successors, (38), 38 states have call predecessors, (38), 113 states have return successors, (444), 92 states have call predecessors, (444), 37 states have call successors, (444) [2023-03-30 23:25:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7754 states to 7754 states and 10918 transitions. [2023-03-30 23:25:05,793 INFO L78 Accepts]: Start accepts. Automaton has 7754 states and 10918 transitions. Word has length 155 [2023-03-30 23:25:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:05,795 INFO L495 AbstractCegarLoop]: Abstraction has 7754 states and 10918 transitions. [2023-03-30 23:25:05,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.285714285714285) internal successors, (149), 5 states have internal predecessors, (149), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:25:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7754 states and 10918 transitions. [2023-03-30 23:25:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-03-30 23:25:05,805 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:05,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:25:05,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:25:05,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:05,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:05,805 INFO L85 PathProgramCache]: Analyzing trace with hash -172640424, now seen corresponding path program 1 times [2023-03-30 23:25:05,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:05,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893437761] [2023-03-30 23:25:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:05,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:06,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:06,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:06,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-03-30 23:25:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 78 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:25:06,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893437761] [2023-03-30 23:25:06,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893437761] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:06,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134089714] [2023-03-30 23:25:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:06,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:06,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:06,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:25:06,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:25:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:06,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:25:06,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 23:25:06,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:25:06,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134089714] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:06,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:25:06,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2023-03-30 23:25:06,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815373756] [2023-03-30 23:25:06,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:06,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:25:06,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:06,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:25:06,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:25:06,605 INFO L87 Difference]: Start difference. First operand 7754 states and 10918 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:25:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:11,347 INFO L93 Difference]: Finished difference Result 22466 states and 32893 transitions. [2023-03-30 23:25:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 23:25:11,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 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 218 [2023-03-30 23:25:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:11,404 INFO L225 Difference]: With dead ends: 22466 [2023-03-30 23:25:11,404 INFO L226 Difference]: Without dead ends: 14718 [2023-03-30 23:25:11,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:25:11,422 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 3131 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 4923 mSolverCounterSat, 1448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3131 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 6371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1448 IncrementalHoareTripleChecker+Valid, 4923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:11,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3131 Valid, 638 Invalid, 6371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1448 Valid, 4923 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-03-30 23:25:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14718 states. [2023-03-30 23:25:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14718 to 14577. [2023-03-30 23:25:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14577 states, 14222 states have (on average 1.269863591618619) internal successors, (18060), 14289 states have internal predecessors, (18060), 70 states have call successors, (70), 70 states have call predecessors, (70), 284 states have return successors, (1535), 217 states have call predecessors, (1535), 69 states have call successors, (1535) [2023-03-30 23:25:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14577 states to 14577 states and 19665 transitions. [2023-03-30 23:25:11,726 INFO L78 Accepts]: Start accepts. Automaton has 14577 states and 19665 transitions. Word has length 218 [2023-03-30 23:25:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:11,727 INFO L495 AbstractCegarLoop]: Abstraction has 14577 states and 19665 transitions. [2023-03-30 23:25:11,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:25:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14577 states and 19665 transitions. [2023-03-30 23:25:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-03-30 23:25:11,730 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:11,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:25:11,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 23:25:11,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:11,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:11,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1150543617, now seen corresponding path program 1 times [2023-03-30 23:25:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619258463] [2023-03-30 23:25:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:12,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:12,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-30 23:25:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 79 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:25:12,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:12,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619258463] [2023-03-30 23:25:12,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619258463] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:12,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805591808] [2023-03-30 23:25:12,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:12,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:12,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:12,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:25:12,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:25:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:12,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:25:12,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-03-30 23:25:12,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:25:12,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805591808] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:12,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:25:12,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2023-03-30 23:25:12,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404644980] [2023-03-30 23:25:12,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:25:12,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:12,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:25:12,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:25:12,951 INFO L87 Difference]: Start difference. First operand 14577 states and 19665 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:25:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:15,680 INFO L93 Difference]: Finished difference Result 29149 states and 39437 transitions. [2023-03-30 23:25:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:25:15,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 255 [2023-03-30 23:25:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:15,720 INFO L225 Difference]: With dead ends: 29149 [2023-03-30 23:25:15,720 INFO L226 Difference]: Without dead ends: 14578 [2023-03-30 23:25:15,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:25:15,749 INFO L413 NwaCegarLoop]: 1414 mSDtfsCounter, 1188 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2460 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:15,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 1520 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2460 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-30 23:25:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14578 states. [2023-03-30 23:25:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14578 to 12971. [2023-03-30 23:25:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12971 states, 12632 states have (on average 1.2022640911969602) internal successors, (15187), 12699 states have internal predecessors, (15187), 62 states have call successors, (62), 62 states have call predecessors, (62), 276 states have return successors, (1055), 209 states have call predecessors, (1055), 61 states have call successors, (1055) [2023-03-30 23:25:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12971 states to 12971 states and 16304 transitions. [2023-03-30 23:25:16,080 INFO L78 Accepts]: Start accepts. Automaton has 12971 states and 16304 transitions. Word has length 255 [2023-03-30 23:25:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:16,081 INFO L495 AbstractCegarLoop]: Abstraction has 12971 states and 16304 transitions. [2023-03-30 23:25:16,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:25:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 12971 states and 16304 transitions. [2023-03-30 23:25:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-03-30 23:25:16,086 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:16,087 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:25:16,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 23:25:16,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:25:16,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:16,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -462033300, now seen corresponding path program 1 times [2023-03-30 23:25:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723390733] [2023-03-30 23:25:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:16,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:16,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:16,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-03-30 23:25:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:25:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:16,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723390733] [2023-03-30 23:25:16,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723390733] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:16,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625642612] [2023-03-30 23:25:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:16,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:16,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:16,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:25:16,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:25:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:16,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:25:16,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:17,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:25:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:17,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625642612] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:25:17,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:25:17,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:25:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993276789] [2023-03-30 23:25:17,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:25:17,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:25:17,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:25:17,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:25:17,463 INFO L87 Difference]: Start difference. First operand 12971 states and 16304 transitions. Second operand has 12 states, 12 states have (on average 56.0) internal successors, (672), 10 states have internal predecessors, (672), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:25:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:27,545 INFO L93 Difference]: Finished difference Result 34442 states and 45629 transitions. [2023-03-30 23:25:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 23:25:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 56.0) internal successors, (672), 10 states have internal predecessors, (672), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 319 [2023-03-30 23:25:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:27,604 INFO L225 Difference]: With dead ends: 34442 [2023-03-30 23:25:27,604 INFO L226 Difference]: Without dead ends: 21477 [2023-03-30 23:25:27,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 642 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-03-30 23:25:27,625 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 9435 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 13705 mSolverCounterSat, 2948 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9435 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 16653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2948 IncrementalHoareTripleChecker+Valid, 13705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:27,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9435 Valid, 1255 Invalid, 16653 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2948 Valid, 13705 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-03-30 23:25:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21477 states. [2023-03-30 23:25:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21477 to 21330. [2023-03-30 23:25:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21330 states, 20501 states have (on average 1.1634554411979903) internal successors, (23852), 20728 states have internal predecessors, (23852), 98 states have call successors, (98), 98 states have call predecessors, (98), 730 states have return successors, (3250), 503 states have call predecessors, (3250), 97 states have call successors, (3250) [2023-03-30 23:25:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21330 states to 21330 states and 27200 transitions. [2023-03-30 23:25:27,997 INFO L78 Accepts]: Start accepts. Automaton has 21330 states and 27200 transitions. Word has length 319 [2023-03-30 23:25:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:27,998 INFO L495 AbstractCegarLoop]: Abstraction has 21330 states and 27200 transitions. [2023-03-30 23:25:27,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.0) internal successors, (672), 10 states have internal predecessors, (672), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:25:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 21330 states and 27200 transitions. [2023-03-30 23:25:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2023-03-30 23:25:28,005 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:28,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:25:28,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:25:28,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:28,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:28,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1523429240, now seen corresponding path program 1 times [2023-03-30 23:25:28,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:28,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517795620] [2023-03-30 23:25:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:28,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:28,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:28,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:28,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-30 23:25:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-03-30 23:25:28,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:28,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517795620] [2023-03-30 23:25:28,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517795620] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:28,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415811905] [2023-03-30 23:25:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:28,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:28,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:28,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:25:28,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:25:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:28,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 23:25:28,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-03-30 23:25:28,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:25:28,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415811905] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:28,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:25:28,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:25:28,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916013983] [2023-03-30 23:25:28,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:28,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:25:28,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:25:28,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:25:28,641 INFO L87 Difference]: Start difference. First operand 21330 states and 27200 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:25:31,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:31,982 INFO L93 Difference]: Finished difference Result 61381 states and 80445 transitions. [2023-03-30 23:25:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:25:31,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 323 [2023-03-30 23:25:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:32,082 INFO L225 Difference]: With dead ends: 61381 [2023-03-30 23:25:32,083 INFO L226 Difference]: Without dead ends: 39188 [2023-03-30 23:25:32,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:25:32,122 INFO L413 NwaCegarLoop]: 1616 mSDtfsCounter, 1002 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 3402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:32,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 1755 Invalid, 3402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:25:32,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39188 states. [2023-03-30 23:25:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39188 to 35120. [2023-03-30 23:25:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35120 states, 34095 states have (on average 1.1423375861563279) internal successors, (38948), 34349 states have internal predecessors, (38948), 166 states have call successors, (166), 166 states have call predecessors, (166), 858 states have return successors, (5469), 604 states have call predecessors, (5469), 165 states have call successors, (5469) [2023-03-30 23:25:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35120 states to 35120 states and 44583 transitions. [2023-03-30 23:25:32,764 INFO L78 Accepts]: Start accepts. Automaton has 35120 states and 44583 transitions. Word has length 323 [2023-03-30 23:25:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:32,764 INFO L495 AbstractCegarLoop]: Abstraction has 35120 states and 44583 transitions. [2023-03-30 23:25:32,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:25:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 35120 states and 44583 transitions. [2023-03-30 23:25:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2023-03-30 23:25:32,770 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:32,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:25:32,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:25:32,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:32,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:32,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:32,977 INFO L85 PathProgramCache]: Analyzing trace with hash 651018678, now seen corresponding path program 1 times [2023-03-30 23:25:32,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:32,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099727818] [2023-03-30 23:25:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:32,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:33,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:33,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:33,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-30 23:25:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:25:33,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:33,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099727818] [2023-03-30 23:25:33,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099727818] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:33,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315770734] [2023-03-30 23:25:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:33,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:33,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:33,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:25:33,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:25:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:33,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:25:33,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:33,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:25:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:34,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315770734] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:25:34,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:25:34,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:25:34,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907434651] [2023-03-30 23:25:34,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:25:34,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:25:34,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:34,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:25:34,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:25:34,140 INFO L87 Difference]: Start difference. First operand 35120 states and 44583 transitions. Second operand has 11 states, 11 states have (on average 56.90909090909091) internal successors, (626), 9 states have internal predecessors, (626), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5)