/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/Problem14_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:30:05,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:30:05,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:30:06,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:30:06,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:30:06,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:30:06,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:30:06,039 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 23:30:06,065 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:30:06,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:30:06,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:30:06,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:30:06,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:30:06,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:30:06,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:30:06,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:30:06,067 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:30:06,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:30:06,067 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:30:06,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:30:06,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:30:06,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:30:06,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:30:06,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:30:06,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:30:06,068 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:30:06,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:30:06,068 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:30:06,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:30:06,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:30:06,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:30:06,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:30:06,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:30:06,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:30:06,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:30:06,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:30:06,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:30:06,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:30:06,070 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:30:06,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:30:06,070 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:30:06,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:30:06,070 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:30:06,070 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:30:06,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:30:06,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:30:06,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:30:06,337 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:30:06,338 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:30:06,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label54.c [2023-03-30 23:30:07,461 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:30:07,724 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:30:07,725 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label54.c [2023-03-30 23:30:07,737 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44c3127ee/3c9338ca379f46cebe6a09a0c33dc877/FLAGd2aeb9623 [2023-03-30 23:30:07,749 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44c3127ee/3c9338ca379f46cebe6a09a0c33dc877 [2023-03-30 23:30:07,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:30:07,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:30:07,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:30:07,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:30:07,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:30:07,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:30:07" (1/1) ... [2023-03-30 23:30:07,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7619f3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:07, skipping insertion in model container [2023-03-30 23:30:07,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:30:07" (1/1) ... [2023-03-30 23:30:07,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:30:07,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:30:08,003 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/Problem14_label54.c[957,970] [2023-03-30 23:30:08,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:30:08,246 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:30:08,258 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/Problem14_label54.c[957,970] [2023-03-30 23:30:08,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:30:08,360 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:30:08,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08 WrapperNode [2023-03-30 23:30:08,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:30:08,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:30:08,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:30:08,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:30:08,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (1/1) ... [2023-03-30 23:30:08,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (1/1) ... [2023-03-30 23:30:08,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (1/1) ... [2023-03-30 23:30:08,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (1/1) ... [2023-03-30 23:30:08,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (1/1) ... [2023-03-30 23:30:08,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (1/1) ... [2023-03-30 23:30:08,481 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (1/1) ... [2023-03-30 23:30:08,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (1/1) ... [2023-03-30 23:30:08,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:30:08,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:30:08,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:30:08,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:30:08,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (1/1) ... [2023-03-30 23:30:08,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:30:08,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:08,546 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 23:30:08,568 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 23:30:08,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:30:08,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:30:08,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:30:08,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:30:08,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:30:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:30:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:30:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:30:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:30:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:30:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:30:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:30:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:30:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:30:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:30:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:30:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:30:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:30:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:30:08,669 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:30:08,672 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:30:09,704 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:30:09,719 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:30:09,719 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:30:09,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:30:09 BoogieIcfgContainer [2023-03-30 23:30:09,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:30:09,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:30:09,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:30:09,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:30:09,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:30:07" (1/3) ... [2023-03-30 23:30:09,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed5095a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:30:09, skipping insertion in model container [2023-03-30 23:30:09,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:30:08" (2/3) ... [2023-03-30 23:30:09,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed5095a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:30:09, skipping insertion in model container [2023-03-30 23:30:09,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:30:09" (3/3) ... [2023-03-30 23:30:09,733 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label54.c [2023-03-30 23:30:09,749 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:30:09,749 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:30:09,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:30:09,820 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;@6dc39560, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:30:09,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:30:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 254 states, 246 states have (on average 1.7276422764227641) internal successors, (425), 247 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:30:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-30 23:30:09,831 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:09,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:30:09,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:09,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash 882072225, now seen corresponding path program 1 times [2023-03-30 23:30:09,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:09,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693189410] [2023-03-30 23:30:09,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:09,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:10,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:10,273 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 23:30:10,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:10,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693189410] [2023-03-30 23:30:10,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693189410] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:30:10,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:30:10,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:30:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089744429] [2023-03-30 23:30:10,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:30:10,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:30:10,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:30:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:30:10,312 INFO L87 Difference]: Start difference. First operand has 254 states, 246 states have (on average 1.7276422764227641) internal successors, (425), 247 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:30:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:11,623 INFO L93 Difference]: Finished difference Result 714 states and 1256 transitions. [2023-03-30 23:30:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:30:11,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-30 23:30:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:11,637 INFO L225 Difference]: With dead ends: 714 [2023-03-30 23:30:11,638 INFO L226 Difference]: Without dead ends: 380 [2023-03-30 23:30:11,645 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 [2023-03-30 23:30:11,648 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 658 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:11,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 21 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 23:30:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-03-30 23:30:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 376. [2023-03-30 23:30:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 366 states have (on average 1.4125683060109289) internal successors, (517), 368 states have internal predecessors, (517), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:30:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2023-03-30 23:30:11,734 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 12 [2023-03-30 23:30:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:11,734 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2023-03-30 23:30:11,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:30:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2023-03-30 23:30:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-03-30 23:30:11,738 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:11,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:30:11,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:30:11,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:11,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash -743868179, now seen corresponding path program 1 times [2023-03-30 23:30:11,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:11,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937325698] [2023-03-30 23:30:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:11,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:11,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:11,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:30:12,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937325698] [2023-03-30 23:30:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937325698] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015723722] [2023-03-30 23:30:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:12,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:12,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:12,046 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 23:30:12,047 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 23:30:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:12,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:30:12,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:30:12,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:30:12,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015723722] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:30:12,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:30:12,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:30:12,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849153736] [2023-03-30 23:30:12,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:30:12,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:30:12,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:12,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:30:12,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:30:12,221 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:30:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:12,937 INFO L93 Difference]: Finished difference Result 1114 states and 1582 transitions. [2023-03-30 23:30:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:30:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 95 [2023-03-30 23:30:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:12,943 INFO L225 Difference]: With dead ends: 1114 [2023-03-30 23:30:12,943 INFO L226 Difference]: Without dead ends: 744 [2023-03-30 23:30:12,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:30:12,945 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 175 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:12,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 323 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 23:30:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2023-03-30 23:30:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 560. [2023-03-30 23:30:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 547 states have (on average 1.287020109689214) internal successors, (704), 550 states have internal predecessors, (704), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-03-30 23:30:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 721 transitions. [2023-03-30 23:30:12,979 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 721 transitions. Word has length 95 [2023-03-30 23:30:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:12,980 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 721 transitions. [2023-03-30 23:30:12,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:30:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 721 transitions. [2023-03-30 23:30:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-03-30 23:30:12,983 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:12,983 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:30:12,992 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 23:30:13,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:13,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:13,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:13,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1801505557, now seen corresponding path program 1 times [2023-03-30 23:30:13,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:13,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633087259] [2023-03-30 23:30:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:13,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:13,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:30:13,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:13,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633087259] [2023-03-30 23:30:13,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633087259] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:13,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432587745] [2023-03-30 23:30:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:13,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:13,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:13,637 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 23:30:13,666 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 23:30:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:13,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:30:13,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:30:14,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:30:14,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432587745] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:30:14,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:30:14,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-30 23:30:14,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462588777] [2023-03-30 23:30:14,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:30:14,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:30:14,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:30:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:30:14,199 INFO L87 Difference]: Start difference. First operand 560 states and 721 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 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 23:30:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:14,989 INFO L93 Difference]: Finished difference Result 1310 states and 1673 transitions. [2023-03-30 23:30:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:30:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 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 107 [2023-03-30 23:30:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:14,998 INFO L225 Difference]: With dead ends: 1310 [2023-03-30 23:30:14,998 INFO L226 Difference]: Without dead ends: 756 [2023-03-30 23:30:14,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:30:15,000 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 378 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:15,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 52 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 23:30:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-03-30 23:30:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 746. [2023-03-30 23:30:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 729 states have (on average 1.2565157750342935) internal successors, (916), 734 states have internal predecessors, (916), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-03-30 23:30:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 940 transitions. [2023-03-30 23:30:15,050 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 940 transitions. Word has length 107 [2023-03-30 23:30:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:15,051 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 940 transitions. [2023-03-30 23:30:15,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 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 23:30:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 940 transitions. [2023-03-30 23:30:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-03-30 23:30:15,061 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:15,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:30:15,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:30:15,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-30 23:30:15,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:15,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash -342283879, now seen corresponding path program 1 times [2023-03-30 23:30:15,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:15,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392507996] [2023-03-30 23:30:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:15,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:15,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:30:15,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:15,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392507996] [2023-03-30 23:30:15,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392507996] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:15,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767378877] [2023-03-30 23:30:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:15,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:15,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:15,531 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 23:30:15,533 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 23:30:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:15,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:30:15,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:30:15,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:30:15,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767378877] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:30:15,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:30:15,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2023-03-30 23:30:15,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007598019] [2023-03-30 23:30:15,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:30:15,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:30:15,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:30:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:30:15,654 INFO L87 Difference]: Start difference. First operand 746 states and 940 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:30:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:16,176 INFO L93 Difference]: Finished difference Result 1116 states and 1476 transitions. [2023-03-30 23:30:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:30:16,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 121 [2023-03-30 23:30:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:16,181 INFO L225 Difference]: With dead ends: 1116 [2023-03-30 23:30:16,181 INFO L226 Difference]: Without dead ends: 1114 [2023-03-30 23:30:16,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:30:16,183 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 198 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:16,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 33 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 23:30:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-03-30 23:30:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 932. [2023-03-30 23:30:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 911 states have (on average 1.3304061470911086) internal successors, (1212), 918 states have internal predecessors, (1212), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2023-03-30 23:30:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1250 transitions. [2023-03-30 23:30:16,227 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1250 transitions. Word has length 121 [2023-03-30 23:30:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:16,228 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1250 transitions. [2023-03-30 23:30:16,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:30:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1250 transitions. [2023-03-30 23:30:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-30 23:30:16,231 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:16,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:16,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 23:30:16,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:16,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:16,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1803665810, now seen corresponding path program 1 times [2023-03-30 23:30:16,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:16,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602280070] [2023-03-30 23:30:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:16,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:16,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:16,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:16,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-03-30 23:30:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:30:16,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:16,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602280070] [2023-03-30 23:30:16,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602280070] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:16,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826886773] [2023-03-30 23:30:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:16,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:16,730 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 23:30:16,733 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 23:30:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:16,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:30:16,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 23:30:16,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:30:16,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826886773] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:30:16,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:30:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-03-30 23:30:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199213087] [2023-03-30 23:30:16,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:30:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:30:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:30:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:30:16,946 INFO L87 Difference]: Start difference. First operand 932 states and 1250 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 23:30:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:17,821 INFO L93 Difference]: Finished difference Result 2062 states and 2862 transitions. [2023-03-30 23:30:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:30:17,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 177 [2023-03-30 23:30:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:17,827 INFO L225 Difference]: With dead ends: 2062 [2023-03-30 23:30:17,827 INFO L226 Difference]: Without dead ends: 1136 [2023-03-30 23:30:17,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:30:17,832 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 459 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:17,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 40 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 23:30:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-03-30 23:30:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1118. [2023-03-30 23:30:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1093 states have (on average 1.2698993595608417) internal successors, (1388), 1102 states have internal predecessors, (1388), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (40), 7 states have call predecessors, (40), 7 states have call successors, (40) [2023-03-30 23:30:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1436 transitions. [2023-03-30 23:30:17,874 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1436 transitions. Word has length 177 [2023-03-30 23:30:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:17,875 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1436 transitions. [2023-03-30 23:30:17,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 23:30:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1436 transitions. [2023-03-30 23:30:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-03-30 23:30:17,877 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:17,877 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:17,886 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 23:30:18,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:18,083 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:18,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash 230183573, now seen corresponding path program 1 times [2023-03-30 23:30:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:18,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711342934] [2023-03-30 23:30:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:18,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:18,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:18,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:18,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-03-30 23:30:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:30:18,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:18,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711342934] [2023-03-30 23:30:18,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711342934] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:18,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720870952] [2023-03-30 23:30:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:18,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:18,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:18,810 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 23:30:18,812 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 23:30:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:18,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:30:18,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 23:30:19,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:30:19,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720870952] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:30:19,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:30:19,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-03-30 23:30:19,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751412523] [2023-03-30 23:30:19,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:30:19,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:30:19,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:19,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:30:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:30:19,171 INFO L87 Difference]: Start difference. First operand 1118 states and 1436 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 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 23:30:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:20,105 INFO L93 Difference]: Finished difference Result 2258 states and 2907 transitions. [2023-03-30 23:30:20,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:30:20,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 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 180 [2023-03-30 23:30:20,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:20,111 INFO L225 Difference]: With dead ends: 2258 [2023-03-30 23:30:20,112 INFO L226 Difference]: Without dead ends: 1328 [2023-03-30 23:30:20,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-03-30 23:30:20,115 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 423 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:20,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 54 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 23:30:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2023-03-30 23:30:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1120. [2023-03-30 23:30:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1094 states have (on average 1.2586837294332724) internal successors, (1377), 1104 states have internal predecessors, (1377), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (43), 7 states have call predecessors, (43), 7 states have call successors, (43) [2023-03-30 23:30:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1428 transitions. [2023-03-30 23:30:20,147 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1428 transitions. Word has length 180 [2023-03-30 23:30:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:20,148 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 1428 transitions. [2023-03-30 23:30:20,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 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 23:30:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1428 transitions. [2023-03-30 23:30:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-03-30 23:30:20,150 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:20,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:30:20,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:30:20,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:20,356 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:20,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash -577409750, now seen corresponding path program 1 times [2023-03-30 23:30:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:20,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151147687] [2023-03-30 23:30:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:20,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-30 23:30:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:30:21,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:21,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151147687] [2023-03-30 23:30:21,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151147687] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:21,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359114660] [2023-03-30 23:30:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:21,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:21,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:21,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:30:21,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:30:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:21,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-30 23:30:21,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:30:22,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:30:24,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359114660] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:24,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:24,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-03-30 23:30:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629186797] [2023-03-30 23:30:24,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:24,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 23:30:24,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 23:30:24,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-03-30 23:30:24,997 INFO L87 Difference]: Start difference. First operand 1120 states and 1428 transitions. Second operand has 22 states, 22 states have (on average 24.272727272727273) internal successors, (534), 20 states have internal predecessors, (534), 7 states have call successors, (12), 11 states have call predecessors, (12), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-30 23:30:29,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:29,423 INFO L93 Difference]: Finished difference Result 3667 states and 4885 transitions. [2023-03-30 23:30:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-03-30 23:30:29,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 24.272727272727273) internal successors, (534), 20 states have internal predecessors, (534), 7 states have call successors, (12), 11 states have call predecessors, (12), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 191 [2023-03-30 23:30:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:29,433 INFO L225 Difference]: With dead ends: 3667 [2023-03-30 23:30:29,433 INFO L226 Difference]: Without dead ends: 2298 [2023-03-30 23:30:29,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=750, Invalid=2442, Unknown=0, NotChecked=0, Total=3192 [2023-03-30 23:30:29,439 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4778 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 1451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4784 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 4704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1451 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:29,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4784 Valid, 131 Invalid, 4704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1451 Valid, 3253 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-30 23:30:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2023-03-30 23:30:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1498. [2023-03-30 23:30:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1461 states have (on average 1.0924024640657084) internal successors, (1596), 1478 states have internal predecessors, (1596), 10 states have call successors, (10), 10 states have call predecessors, (10), 26 states have return successors, (64), 9 states have call predecessors, (64), 9 states have call successors, (64) [2023-03-30 23:30:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 1670 transitions. [2023-03-30 23:30:29,484 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 1670 transitions. Word has length 191 [2023-03-30 23:30:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:29,484 INFO L495 AbstractCegarLoop]: Abstraction has 1498 states and 1670 transitions. [2023-03-30 23:30:29,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.272727272727273) internal successors, (534), 20 states have internal predecessors, (534), 7 states have call successors, (12), 11 states have call predecessors, (12), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-30 23:30:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 1670 transitions. [2023-03-30 23:30:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2023-03-30 23:30:29,490 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:29,490 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:30:29,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-30 23:30:29,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:29,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:29,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash -883357202, now seen corresponding path program 1 times [2023-03-30 23:30:29,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:29,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314627612] [2023-03-30 23:30:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:29,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:29,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:30,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-03-30 23:30:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:30,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2023-03-30 23:30:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:30,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 305 [2023-03-30 23:30:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 101 proven. 148 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-03-30 23:30:30,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:30,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314627612] [2023-03-30 23:30:30,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314627612] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:30,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35069850] [2023-03-30 23:30:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:30,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:30,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:30,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:30:30,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 23:30:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:30,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:30:30,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 429 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-03-30 23:30:30,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 102 proven. 150 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2023-03-30 23:30:30,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35069850] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:30,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:30,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:30:30,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983933647] [2023-03-30 23:30:30,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:30,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:30:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:30,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:30:30,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:30:30,702 INFO L87 Difference]: Start difference. First operand 1498 states and 1670 transitions. Second operand has 12 states, 12 states have (on average 37.916666666666664) internal successors, (455), 10 states have internal predecessors, (455), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 23:30:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:32,266 INFO L93 Difference]: Finished difference Result 5948 states and 6851 transitions. [2023-03-30 23:30:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-30 23:30:32,268 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 37.916666666666664) internal successors, (455), 10 states have internal predecessors, (455), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 395 [2023-03-30 23:30:32,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:32,289 INFO L225 Difference]: With dead ends: 5948 [2023-03-30 23:30:32,289 INFO L226 Difference]: Without dead ends: 4456 [2023-03-30 23:30:32,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 807 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2023-03-30 23:30:32,298 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1893 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1893 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:32,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1893 Valid, 72 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 23:30:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2023-03-30 23:30:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 4090. [2023-03-30 23:30:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4090 states, 4003 states have (on average 1.0789407944041969) internal successors, (4319), 4042 states have internal predecessors, (4319), 24 states have call successors, (24), 24 states have call predecessors, (24), 62 states have return successors, (260), 23 states have call predecessors, (260), 23 states have call successors, (260) [2023-03-30 23:30:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 4603 transitions. [2023-03-30 23:30:32,445 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 4603 transitions. Word has length 395 [2023-03-30 23:30:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:32,446 INFO L495 AbstractCegarLoop]: Abstraction has 4090 states and 4603 transitions. [2023-03-30 23:30:32,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.916666666666664) internal successors, (455), 10 states have internal predecessors, (455), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 23:30:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 4603 transitions. [2023-03-30 23:30:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2023-03-30 23:30:32,459 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:32,459 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 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 23:30:32,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 23:30:32,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:32,666 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:32,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:32,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1339574261, now seen corresponding path program 1 times [2023-03-30 23:30:32,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:32,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270183549] [2023-03-30 23:30:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:32,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:33,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:33,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:33,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:33,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:33,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-03-30 23:30:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:34,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 501 [2023-03-30 23:30:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 184 proven. 459 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-03-30 23:30:34,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:34,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270183549] [2023-03-30 23:30:34,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270183549] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:34,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350437284] [2023-03-30 23:30:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:34,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:34,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:34,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:30:34,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 23:30:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:34,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:30:34,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2023-03-30 23:30:34,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:30:34,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350437284] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:30:34,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:30:34,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2023-03-30 23:30:34,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822177060] [2023-03-30 23:30:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:30:34,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:30:34,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:30:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:30:34,385 INFO L87 Difference]: Start difference. First operand 4090 states and 4603 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 23:30:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:34,824 INFO L93 Difference]: Finished difference Result 8908 states and 10102 transitions. [2023-03-30 23:30:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:30:34,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 591 [2023-03-30 23:30:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:34,842 INFO L225 Difference]: With dead ends: 8908 [2023-03-30 23:30:34,842 INFO L226 Difference]: Without dead ends: 4824 [2023-03-30 23:30:34,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:30:34,852 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 175 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:34,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 246 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 23:30:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2023-03-30 23:30:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4458. [2023-03-30 23:30:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4365 states have (on average 1.07262313860252) internal successors, (4682), 4406 states have internal predecessors, (4682), 26 states have call successors, (26), 26 states have call predecessors, (26), 66 states have return successors, (284), 25 states have call predecessors, (284), 25 states have call successors, (284) [2023-03-30 23:30:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 4992 transitions. [2023-03-30 23:30:34,959 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 4992 transitions. Word has length 591 [2023-03-30 23:30:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:34,960 INFO L495 AbstractCegarLoop]: Abstraction has 4458 states and 4992 transitions. [2023-03-30 23:30:34,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 23:30:34,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 4992 transitions. [2023-03-30 23:30:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-03-30 23:30:34,974 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:34,975 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 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 23:30:34,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 23:30:35,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-03-30 23:30:35,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:35,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:35,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1485364418, now seen corresponding path program 1 times [2023-03-30 23:30:35,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:35,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72217507] [2023-03-30 23:30:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:35,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:35,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:35,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:36,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:36,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:36,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-03-30 23:30:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:36,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 501 [2023-03-30 23:30:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 184 proven. 535 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-03-30 23:30:36,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:36,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72217507] [2023-03-30 23:30:36,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72217507] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:36,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111629486] [2023-03-30 23:30:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:36,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:36,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:36,550 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:30:36,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 23:30:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:36,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:30:36,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2023-03-30 23:30:36,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:30:36,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111629486] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:30:36,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:30:36,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2023-03-30 23:30:36,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748050862] [2023-03-30 23:30:36,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:30:36,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:30:36,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:30:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:30:36,811 INFO L87 Difference]: Start difference. First operand 4458 states and 4992 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 23:30:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:37,233 INFO L93 Difference]: Finished difference Result 8910 states and 9978 transitions. [2023-03-30 23:30:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:30:37,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 610 [2023-03-30 23:30:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:37,270 INFO L225 Difference]: With dead ends: 8910 [2023-03-30 23:30:37,271 INFO L226 Difference]: Without dead ends: 4458 [2023-03-30 23:30:37,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:30:37,277 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 177 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:37,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 214 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 23:30:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4458 states. [2023-03-30 23:30:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4458 to 4276. [2023-03-30 23:30:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4185 states have (on average 1.0690561529271208) internal successors, (4474), 4226 states have internal predecessors, (4474), 25 states have call successors, (25), 25 states have call predecessors, (25), 65 states have return successors, (262), 24 states have call predecessors, (262), 24 states have call successors, (262) [2023-03-30 23:30:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 4761 transitions. [2023-03-30 23:30:37,379 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 4761 transitions. Word has length 610 [2023-03-30 23:30:37,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:37,380 INFO L495 AbstractCegarLoop]: Abstraction has 4276 states and 4761 transitions. [2023-03-30 23:30:37,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 23:30:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 4761 transitions. [2023-03-30 23:30:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-03-30 23:30:37,388 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:37,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 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 23:30:37,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 23:30:37,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-30 23:30:37,595 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:37,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1236782729, now seen corresponding path program 1 times [2023-03-30 23:30:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:37,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905989113] [2023-03-30 23:30:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:38,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:38,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:38,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:38,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:38,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-03-30 23:30:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:38,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 501 [2023-03-30 23:30:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 184 proven. 590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-03-30 23:30:38,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905989113] [2023-03-30 23:30:38,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905989113] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368501957] [2023-03-30 23:30:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:38,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:38,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:38,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:30:38,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 23:30:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:39,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:30:39,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 829 proven. 2 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:30:39,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 372 proven. 112 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2023-03-30 23:30:40,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368501957] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:40,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:40,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 12 [2023-03-30 23:30:40,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201068125] [2023-03-30 23:30:40,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:40,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:30:40,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:40,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:30:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:30:40,124 INFO L87 Difference]: Start difference. First operand 4276 states and 4761 transitions. Second operand has 12 states, 12 states have (on average 54.0) internal successors, (648), 10 states have internal predecessors, (648), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:30:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:41,844 INFO L93 Difference]: Finished difference Result 10046 states and 11188 transitions. [2023-03-30 23:30:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 23:30:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 54.0) internal successors, (648), 10 states have internal predecessors, (648), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 649 [2023-03-30 23:30:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:41,865 INFO L225 Difference]: With dead ends: 10046 [2023-03-30 23:30:41,866 INFO L226 Difference]: Without dead ends: 5408 [2023-03-30 23:30:41,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1347 GetRequests, 1321 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2023-03-30 23:30:41,876 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2338 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2338 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:41,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2338 Valid, 58 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 23:30:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5408 states. [2023-03-30 23:30:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5408 to 4464. [2023-03-30 23:30:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4464 states, 4368 states have (on average 1.0604395604395604) internal successors, (4632), 4412 states have internal predecessors, (4632), 26 states have call successors, (26), 26 states have call predecessors, (26), 69 states have return successors, (247), 25 states have call predecessors, (247), 25 states have call successors, (247) [2023-03-30 23:30:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 4905 transitions. [2023-03-30 23:30:41,989 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 4905 transitions. Word has length 649 [2023-03-30 23:30:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:41,990 INFO L495 AbstractCegarLoop]: Abstraction has 4464 states and 4905 transitions. [2023-03-30 23:30:41,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.0) internal successors, (648), 10 states have internal predecessors, (648), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:30:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 4905 transitions. [2023-03-30 23:30:41,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2023-03-30 23:30:41,999 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:41,999 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:42,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 23:30:42,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-30 23:30:42,207 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:42,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:42,207 INFO L85 PathProgramCache]: Analyzing trace with hash -780858857, now seen corresponding path program 1 times [2023-03-30 23:30:42,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:42,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016474448] [2023-03-30 23:30:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:42,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:43,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:43,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:43,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:43,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:43,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-03-30 23:30:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:43,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2023-03-30 23:30:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:43,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2023-03-30 23:30:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 447 proven. 123 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2023-03-30 23:30:43,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:43,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016474448] [2023-03-30 23:30:43,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016474448] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:43,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418891248] [2023-03-30 23:30:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:43,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:43,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:43,643 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:30:43,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 23:30:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:43,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:30:43,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 983 proven. 2 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-03-30 23:30:44,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 457 proven. 112 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2023-03-30 23:30:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418891248] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:45,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:45,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2023-03-30 23:30:45,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459403927] [2023-03-30 23:30:45,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:45,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 23:30:45,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:45,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 23:30:45,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:30:45,900 INFO L87 Difference]: Start difference. First operand 4464 states and 4905 transitions. Second operand has 16 states, 16 states have (on average 41.0) internal successors, (656), 14 states have internal predecessors, (656), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-03-30 23:30:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:49,450 INFO L93 Difference]: Finished difference Result 8928 states and 9868 transitions. [2023-03-30 23:30:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-03-30 23:30:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 41.0) internal successors, (656), 14 states have internal predecessors, (656), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 722 [2023-03-30 23:30:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:49,481 INFO L225 Difference]: With dead ends: 8928 [2023-03-30 23:30:49,482 INFO L226 Difference]: Without dead ends: 4224 [2023-03-30 23:30:49,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1473 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=685, Invalid=2285, Unknown=0, NotChecked=0, Total=2970 [2023-03-30 23:30:49,490 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3508 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2573 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3512 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:49,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3512 Valid, 116 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2573 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:30:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2023-03-30 23:30:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 3730. [2023-03-30 23:30:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3645 states have (on average 1.0532235939643346) internal successors, (3839), 3686 states have internal predecessors, (3839), 22 states have call successors, (22), 22 states have call predecessors, (22), 62 states have return successors, (205), 21 states have call predecessors, (205), 21 states have call successors, (205) [2023-03-30 23:30:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 4066 transitions. [2023-03-30 23:30:49,588 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 4066 transitions. Word has length 722 [2023-03-30 23:30:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:49,588 INFO L495 AbstractCegarLoop]: Abstraction has 3730 states and 4066 transitions. [2023-03-30 23:30:49,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 41.0) internal successors, (656), 14 states have internal predecessors, (656), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-03-30 23:30:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 4066 transitions. [2023-03-30 23:30:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2023-03-30 23:30:49,598 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:49,598 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:49,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-30 23:30:49,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 23:30:49,806 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:49,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:49,806 INFO L85 PathProgramCache]: Analyzing trace with hash 560079038, now seen corresponding path program 1 times [2023-03-30 23:30:49,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:49,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650692846] [2023-03-30 23:30:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:49,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:50,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:50,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:50,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:50,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2023-03-30 23:30:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:50,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2023-03-30 23:30:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:50,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-03-30 23:30:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:50,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2023-03-30 23:30:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 437 proven. 523 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2023-03-30 23:30:50,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650692846] [2023-03-30 23:30:50,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650692846] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944926066] [2023-03-30 23:30:50,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:50,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:50,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:50,857 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:30:50,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-30 23:30:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:51,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:30:51,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1386 proven. 2 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2023-03-30 23:30:51,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 303 proven. 224 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2023-03-30 23:30:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944926066] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:51,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:51,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2023-03-30 23:30:51,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386833068] [2023-03-30 23:30:51,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:51,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-30 23:30:51,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-30 23:30:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:30:51,423 INFO L87 Difference]: Start difference. First operand 3730 states and 4066 transitions. Second operand has 10 states, 10 states have (on average 63.1) internal successors, (631), 8 states have internal predecessors, (631), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-30 23:30:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:52,412 INFO L93 Difference]: Finished difference Result 9110 states and 9922 transitions. [2023-03-30 23:30:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-30 23:30:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 63.1) internal successors, (631), 8 states have internal predecessors, (631), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 826 [2023-03-30 23:30:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:52,426 INFO L225 Difference]: With dead ends: 9110 [2023-03-30 23:30:52,427 INFO L226 Difference]: Without dead ends: 5386 [2023-03-30 23:30:52,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1689 GetRequests, 1671 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-03-30 23:30:52,434 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1103 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:52,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1103 Valid, 74 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 23:30:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5386 states. [2023-03-30 23:30:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5386 to 5010. [2023-03-30 23:30:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 4908 states have (on average 1.0452322738386308) internal successors, (5130), 4952 states have internal predecessors, (5130), 29 states have call successors, (29), 29 states have call predecessors, (29), 72 states have return successors, (242), 28 states have call predecessors, (242), 28 states have call successors, (242) [2023-03-30 23:30:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 5401 transitions. [2023-03-30 23:30:52,536 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 5401 transitions. Word has length 826 [2023-03-30 23:30:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:52,537 INFO L495 AbstractCegarLoop]: Abstraction has 5010 states and 5401 transitions. [2023-03-30 23:30:52,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 63.1) internal successors, (631), 8 states have internal predecessors, (631), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-30 23:30:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 5401 transitions. [2023-03-30 23:30:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 997 [2023-03-30 23:30:52,550 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:52,551 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:30:52,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-30 23:30:52,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-30 23:30:52,758 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:52,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash 647447535, now seen corresponding path program 1 times [2023-03-30 23:30:52,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:52,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920215091] [2023-03-30 23:30:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:52,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2023-03-30 23:30:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2023-03-30 23:30:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2023-03-30 23:30:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 769 [2023-03-30 23:30:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 848 [2023-03-30 23:30:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 298 proven. 472 refuted. 0 times theorem prover too weak. 2056 trivial. 0 not checked. [2023-03-30 23:30:53,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:53,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920215091] [2023-03-30 23:30:53,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920215091] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:53,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801082714] [2023-03-30 23:30:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:53,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:53,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:53,807 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:30:53,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-30 23:30:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:54,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:30:54,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 1948 proven. 2 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2023-03-30 23:30:54,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 421 proven. 470 refuted. 0 times theorem prover too weak. 1935 trivial. 0 not checked. [2023-03-30 23:30:55,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801082714] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:55,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:55,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:30:55,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924400301] [2023-03-30 23:30:55,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:55,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:30:55,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:55,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:30:55,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:30:55,709 INFO L87 Difference]: Start difference. First operand 5010 states and 5401 transitions. Second operand has 11 states, 11 states have (on average 75.27272727272727) internal successors, (828), 9 states have internal predecessors, (828), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)