/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_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:29:35,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:29:35,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:29:35,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:29:35,515 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 23:29:35,548 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:29:35,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:29:35,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:29:35,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:29:35,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:29:35,550 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:29:35,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:29:35,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:29:35,551 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:29:35,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:29:35,552 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:29:35,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:29:35,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:29:35,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:29:35,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:29:35,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:29:35,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:29:35,554 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:29:35,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:29:35,554 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:29:35,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:29:35,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:29:35,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:29:35,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:29:35,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:29:35,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:29:35,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:29:35,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:29:35,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:29:35,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:29:35,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:29:35,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:29:35,557 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:29:35,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:29:35,557 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:29:35,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:29:35,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:29:35,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:29:35,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:29:35,839 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:29:35,840 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:29:35,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label48.c [2023-03-30 23:29:36,998 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:29:37,262 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:29:37,262 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label48.c [2023-03-30 23:29:37,276 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dbbe6160/18616b066eb84ef78f93fc9370cbc40f/FLAG76f67ade0 [2023-03-30 23:29:37,289 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dbbe6160/18616b066eb84ef78f93fc9370cbc40f [2023-03-30 23:29:37,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:29:37,293 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:29:37,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:29:37,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:29:37,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:29:37,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:37,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388cdda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37, skipping insertion in model container [2023-03-30 23:29:37,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:37,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:29:37,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:29:37,526 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_label48.c[4040,4053] [2023-03-30 23:29:37,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:29:37,735 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:29:37,754 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_label48.c[4040,4053] [2023-03-30 23:29:37,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:29:37,891 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:29:37,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37 WrapperNode [2023-03-30 23:29:37,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:29:37,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:29:37,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:29:37,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:29:37,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:37,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:37,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:37,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:37,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:37,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:37,993 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:37,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:38,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:29:38,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:29:38,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:29:38,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:29:38,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (1/1) ... [2023-03-30 23:29:38,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:29:38,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:29:38,066 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 23:29:38,089 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 23:29:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:29:38,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:29:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:29:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:29:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:29:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:29:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:29:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:29:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:29:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:29:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:29:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:29:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:29:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:29:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:29:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:29:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:29:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:29:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:29:38,195 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:29:38,197 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:29:39,421 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:29:39,436 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:29:39,436 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:29:39,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:29:39 BoogieIcfgContainer [2023-03-30 23:29:39,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:29:39,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:29:39,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:29:39,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:29:39,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:29:37" (1/3) ... [2023-03-30 23:29:39,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4decf490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:29:39, skipping insertion in model container [2023-03-30 23:29:39,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:29:37" (2/3) ... [2023-03-30 23:29:39,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4decf490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:29:39, skipping insertion in model container [2023-03-30 23:29:39,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:29:39" (3/3) ... [2023-03-30 23:29:39,451 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label48.c [2023-03-30 23:29:39,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:29:39,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:29:39,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:29:39,535 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;@55e1f6cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:29:39,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:29:39,540 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 23:29:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-30 23:29:39,546 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:29:39,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:29:39,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:29:39,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:29:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1422400801, now seen corresponding path program 1 times [2023-03-30 23:29:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:29:39,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146641425] [2023-03-30 23:29:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:39,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:29:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:40,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:29:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:40,088 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 23:29:40,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:29:40,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146641425] [2023-03-30 23:29:40,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146641425] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:29:40,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:29:40,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:29:40,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131456017] [2023-03-30 23:29:40,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:29:40,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:29:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:29:40,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:29:40,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:29:40,132 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 5 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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 23:29:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:29:42,009 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2023-03-30 23:29:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:29:42,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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 44 [2023-03-30 23:29:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:29:42,025 INFO L225 Difference]: With dead ends: 886 [2023-03-30 23:29:42,026 INFO L226 Difference]: Without dead ends: 564 [2023-03-30 23:29:42,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:29:42,035 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1276 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:29:42,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1276 Valid, 28 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:29:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-03-30 23:29:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2023-03-30 23:29:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 547 states have (on average 1.5502742230347348) internal successors, (848), 550 states have internal predecessors, (848), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-03-30 23:29:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 867 transitions. [2023-03-30 23:29:42,133 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 867 transitions. Word has length 44 [2023-03-30 23:29:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:29:42,134 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 867 transitions. [2023-03-30 23:29:42,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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 23:29:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 867 transitions. [2023-03-30 23:29:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-03-30 23:29:42,145 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:29:42,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:42,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:29:42,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:29:42,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:29:42,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1214057837, now seen corresponding path program 1 times [2023-03-30 23:29:42,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:29:42,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765625507] [2023-03-30 23:29:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:42,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:29:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:42,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:29:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:42,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:29:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:29:42,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:29:42,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765625507] [2023-03-30 23:29:42,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765625507] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:29:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951589870] [2023-03-30 23:29:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:42,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:42,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:29:42,486 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 23:29:42,515 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 23:29:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:42,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:29:42,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:29:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:29:42,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:29:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951589870] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:29:42,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:29:42,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:29:42,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107583908] [2023-03-30 23:29:42,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:29:42,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:29:42,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:29:42,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:29:42,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:29:42,726 INFO L87 Difference]: Start difference. First operand 560 states and 867 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 23:29:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:29:43,374 INFO L93 Difference]: Finished difference Result 1666 states and 2613 transitions. [2023-03-30 23:29:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:29:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 127 [2023-03-30 23:29:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:29:43,385 INFO L225 Difference]: With dead ends: 1666 [2023-03-30 23:29:43,385 INFO L226 Difference]: Without dead ends: 1112 [2023-03-30 23:29:43,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 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 23:29:43,388 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 143 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 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, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:29:43,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 323 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 23:29:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2023-03-30 23:29:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 744. [2023-03-30 23:29:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 728 states have (on average 1.4217032967032968) internal successors, (1035), 732 states have internal predecessors, (1035), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-03-30 23:29:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1062 transitions. [2023-03-30 23:29:43,415 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1062 transitions. Word has length 127 [2023-03-30 23:29:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:29:43,416 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1062 transitions. [2023-03-30 23:29:43,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 23:29:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1062 transitions. [2023-03-30 23:29:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-03-30 23:29:43,418 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:29:43,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:43,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:29:43,632 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 23:29:43,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:29:43,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:29:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1527354424, now seen corresponding path program 1 times [2023-03-30 23:29:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:29:43,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65659549] [2023-03-30 23:29:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:43,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:29:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:43,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:29:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:43,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:29:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:29:44,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:29:44,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65659549] [2023-03-30 23:29:44,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65659549] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:29:44,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:29:44,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:29:44,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388486731] [2023-03-30 23:29:44,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:29:44,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:29:44,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:29:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:29:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:29:44,032 INFO L87 Difference]: Start difference. First operand 744 states and 1062 transitions. Second operand has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 23:29:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:29:45,264 INFO L93 Difference]: Finished difference Result 2070 states and 2976 transitions. [2023-03-30 23:29:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:29:45,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 130 [2023-03-30 23:29:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:29:45,271 INFO L225 Difference]: With dead ends: 2070 [2023-03-30 23:29:45,272 INFO L226 Difference]: Without dead ends: 1332 [2023-03-30 23:29:45,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:29:45,275 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 615 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:29:45,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 42 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-30 23:29:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2023-03-30 23:29:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1126. [2023-03-30 23:29:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1097 states have (on average 1.340018231540565) internal successors, (1470), 1110 states have internal predecessors, (1470), 8 states have call successors, (8), 8 states have call predecessors, (8), 20 states have return successors, (52), 7 states have call predecessors, (52), 7 states have call successors, (52) [2023-03-30 23:29:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1530 transitions. [2023-03-30 23:29:45,311 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1530 transitions. Word has length 130 [2023-03-30 23:29:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:29:45,311 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1530 transitions. [2023-03-30 23:29:45,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 23:29:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1530 transitions. [2023-03-30 23:29:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-30 23:29:45,341 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:29:45,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:45,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:29:45,342 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:29:45,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:29:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash -104205719, now seen corresponding path program 1 times [2023-03-30 23:29:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:29:45,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233115358] [2023-03-30 23:29:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:45,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:29:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:45,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:29:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:45,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:29:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:29:45,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:29:45,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233115358] [2023-03-30 23:29:45,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233115358] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:29:45,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324494278] [2023-03-30 23:29:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:45,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:29:45,558 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 23:29:45,583 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 23:29:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:45,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:29:45,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:29:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:29:45,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:29:45,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324494278] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:29:45,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:29:45,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:29:45,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161825751] [2023-03-30 23:29:45,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:29:45,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:29:45,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:29:45,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:29:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:29:45,739 INFO L87 Difference]: Start difference. First operand 1126 states and 1530 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 23:29:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:29:46,318 INFO L93 Difference]: Finished difference Result 1866 states and 2663 transitions. [2023-03-30 23:29:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:29:46,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 177 [2023-03-30 23:29:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:29:46,330 INFO L225 Difference]: With dead ends: 1866 [2023-03-30 23:29:46,330 INFO L226 Difference]: Without dead ends: 1864 [2023-03-30 23:29:46,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 181 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 23:29:46,333 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 159 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:29:46,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 69 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 23:29:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2023-03-30 23:29:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1126. [2023-03-30 23:29:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1097 states have (on average 1.340018231540565) internal successors, (1470), 1110 states have internal predecessors, (1470), 8 states have call successors, (8), 8 states have call predecessors, (8), 20 states have return successors, (52), 7 states have call predecessors, (52), 7 states have call successors, (52) [2023-03-30 23:29:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1530 transitions. [2023-03-30 23:29:46,384 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1530 transitions. Word has length 177 [2023-03-30 23:29:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:29:46,385 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1530 transitions. [2023-03-30 23:29:46,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 23:29:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1530 transitions. [2023-03-30 23:29:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-03-30 23:29:46,389 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:29:46,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:29:46,407 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 23:29:46,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:29:46,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:29:46,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:29:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash -77897924, now seen corresponding path program 1 times [2023-03-30 23:29:46,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:29:46,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115052420] [2023-03-30 23:29:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:46,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:29:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:46,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:29:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:46,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:29:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:46,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-03-30 23:29:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:29:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:29:47,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115052420] [2023-03-30 23:29:47,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115052420] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:29:47,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328290939] [2023-03-30 23:29:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:47,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:29:47,057 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 23:29:47,060 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 23:29:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:47,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:29:47,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:29:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:29:47,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:29:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:29:47,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328290939] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:29:47,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:29:47,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:29:47,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104271245] [2023-03-30 23:29:47,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:29:47,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:29:47,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:29:47,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:29:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:29:47,648 INFO L87 Difference]: Start difference. First operand 1126 states and 1530 transitions. Second operand has 12 states, 12 states have (on average 32.5) internal successors, (390), 10 states have internal predecessors, (390), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:29:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:29:50,010 INFO L93 Difference]: Finished difference Result 3384 states and 4836 transitions. [2023-03-30 23:29:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 23:29:50,010 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 32.5) internal successors, (390), 10 states have internal predecessors, (390), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 225 [2023-03-30 23:29:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:29:50,018 INFO L225 Difference]: With dead ends: 3384 [2023-03-30 23:29:50,018 INFO L226 Difference]: Without dead ends: 1894 [2023-03-30 23:29:50,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 455 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2023-03-30 23:29:50,022 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1498 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:29:50,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 109 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2528 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-30 23:29:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2023-03-30 23:29:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1502. [2023-03-30 23:29:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1463 states have (on average 1.2310321257689678) internal successors, (1801), 1482 states have internal predecessors, (1801), 10 states have call successors, (10), 10 states have call predecessors, (10), 28 states have return successors, (83), 9 states have call predecessors, (83), 9 states have call successors, (83) [2023-03-30 23:29:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 1894 transitions. [2023-03-30 23:29:50,058 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 1894 transitions. Word has length 225 [2023-03-30 23:29:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:29:50,058 INFO L495 AbstractCegarLoop]: Abstraction has 1502 states and 1894 transitions. [2023-03-30 23:29:50,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.5) internal successors, (390), 10 states have internal predecessors, (390), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:29:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 1894 transitions. [2023-03-30 23:29:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-03-30 23:29:50,062 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:29:50,062 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:29:50,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:29:50,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:50,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:29:50,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:29:50,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1979388827, now seen corresponding path program 1 times [2023-03-30 23:29:50,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:29:50,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966318550] [2023-03-30 23:29:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:50,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:29:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:50,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:29:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:50,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:29:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:50,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-03-30 23:29:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:29:50,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:29:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966318550] [2023-03-30 23:29:50,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966318550] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:29:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737687548] [2023-03-30 23:29:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:50,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:29:50,910 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 23:29:50,938 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 23:29:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:51,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:29:51,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:29:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-30 23:29:51,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:29:51,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737687548] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:29:51,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:29:51,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-30 23:29:51,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553806188] [2023-03-30 23:29:51,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:29:51,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:29:51,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:29:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:29:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:29:51,442 INFO L87 Difference]: Start difference. First operand 1502 states and 1894 transitions. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 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 23:29:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:29:52,204 INFO L93 Difference]: Finished difference Result 2644 states and 3381 transitions. [2023-03-30 23:29:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:29:52,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 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 242 [2023-03-30 23:29:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:29:52,210 INFO L225 Difference]: With dead ends: 2644 [2023-03-30 23:29:52,211 INFO L226 Difference]: Without dead ends: 1516 [2023-03-30 23:29:52,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:29:52,214 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 340 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:29:52,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 54 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 23:29:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2023-03-30 23:29:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1502. [2023-03-30 23:29:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1463 states have (on average 1.2241968557758032) internal successors, (1791), 1482 states have internal predecessors, (1791), 10 states have call successors, (10), 10 states have call predecessors, (10), 28 states have return successors, (75), 9 states have call predecessors, (75), 9 states have call successors, (75) [2023-03-30 23:29:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 1876 transitions. [2023-03-30 23:29:52,247 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 1876 transitions. Word has length 242 [2023-03-30 23:29:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:29:52,248 INFO L495 AbstractCegarLoop]: Abstraction has 1502 states and 1876 transitions. [2023-03-30 23:29:52,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 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 23:29:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 1876 transitions. [2023-03-30 23:29:52,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-03-30 23:29:52,252 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:29:52,253 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:52,261 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 23:29:52,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:52,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:29:52,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:29:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash 285744667, now seen corresponding path program 1 times [2023-03-30 23:29:52,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:29:52,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066044244] [2023-03-30 23:29:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:52,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:29:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:52,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:29:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:52,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:29:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:53,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-03-30 23:29:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:53,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2023-03-30 23:29:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 185 proven. 85 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-30 23:29:53,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:29:53,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066044244] [2023-03-30 23:29:53,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066044244] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:29:53,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65400306] [2023-03-30 23:29:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:53,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:29:53,545 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 23:29:53,572 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 23:29:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:53,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:29:53,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:29:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-03-30 23:29:53,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:29:53,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65400306] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:29:53,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:29:53,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-03-30 23:29:53,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388736663] [2023-03-30 23:29:53,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:29:53,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:29:53,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:29:53,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:29:53,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:29:53,959 INFO L87 Difference]: Start difference. First operand 1502 states and 1876 transitions. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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 23:29:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:29:54,807 INFO L93 Difference]: Finished difference Result 2838 states and 3578 transitions. [2023-03-30 23:29:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:29:54,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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 315 [2023-03-30 23:29:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:29:54,814 INFO L225 Difference]: With dead ends: 2838 [2023-03-30 23:29:54,814 INFO L226 Difference]: Without dead ends: 1710 [2023-03-30 23:29:54,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-03-30 23:29:54,817 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 424 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:29:54,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 50 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 23:29:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2023-03-30 23:29:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1500. [2023-03-30 23:29:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1462 states have (on average 1.216142270861833) internal successors, (1778), 1480 states have internal predecessors, (1778), 10 states have call successors, (10), 10 states have call predecessors, (10), 27 states have return successors, (65), 9 states have call predecessors, (65), 9 states have call successors, (65) [2023-03-30 23:29:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1853 transitions. [2023-03-30 23:29:54,850 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1853 transitions. Word has length 315 [2023-03-30 23:29:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:29:54,850 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 1853 transitions. [2023-03-30 23:29:54,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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 23:29:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1853 transitions. [2023-03-30 23:29:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2023-03-30 23:29:54,855 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:29:54,855 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:29:54,864 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 23:29:55,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:55,061 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:29:55,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:29:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1307316762, now seen corresponding path program 1 times [2023-03-30 23:29:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:29:55,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243923511] [2023-03-30 23:29:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:29:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:55,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:29:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:55,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:29:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:55,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-30 23:29:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:56,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-03-30 23:29:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 145 proven. 213 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 23:29:56,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:29:56,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243923511] [2023-03-30 23:29:56,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243923511] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:29:56,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082142047] [2023-03-30 23:29:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:56,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:56,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:29:56,149 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 23:29:56,152 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 23:29:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:56,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-30 23:29:56,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:29:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 325 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-03-30 23:29:57,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 116 proven. 245 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 23:30:00,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082142047] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:00,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:00,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-03-30 23:30:00,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411804019] [2023-03-30 23:30:00,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:00,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 23:30:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:00,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 23:30:00,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-03-30 23:30:00,252 INFO L87 Difference]: Start difference. First operand 1500 states and 1853 transitions. Second operand has 22 states, 22 states have (on average 33.95454545454545) internal successors, (747), 21 states have internal predecessors, (747), 7 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-03-30 23:30:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:04,485 INFO L93 Difference]: Finished difference Result 3859 states and 4995 transitions. [2023-03-30 23:30:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-03-30 23:30:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 33.95454545454545) internal successors, (747), 21 states have internal predecessors, (747), 7 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 326 [2023-03-30 23:30:04,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:04,520 INFO L225 Difference]: With dead ends: 3859 [2023-03-30 23:30:04,520 INFO L226 Difference]: Without dead ends: 2296 [2023-03-30 23:30:04,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=779, Invalid=2527, Unknown=0, NotChecked=0, Total=3306 [2023-03-30 23:30:04,527 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3123 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3129 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 4828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:04,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3129 Valid, 153 Invalid, 4828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-30 23:30:04,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2023-03-30 23:30:04,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2050. [2023-03-30 23:30:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2004 states have (on average 1.0733532934131738) internal successors, (2151), 2024 states have internal predecessors, (2151), 13 states have call successors, (13), 13 states have call predecessors, (13), 32 states have return successors, (87), 12 states have call predecessors, (87), 12 states have call successors, (87) [2023-03-30 23:30:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 2251 transitions. [2023-03-30 23:30:04,586 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 2251 transitions. Word has length 326 [2023-03-30 23:30:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:04,586 INFO L495 AbstractCegarLoop]: Abstraction has 2050 states and 2251 transitions. [2023-03-30 23:30:04,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 33.95454545454545) internal successors, (747), 21 states have internal predecessors, (747), 7 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-03-30 23:30:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 2251 transitions. [2023-03-30 23:30:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2023-03-30 23:30:04,599 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:04,599 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-30 23:30:04,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 23:30:04,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:04,807 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:04,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:04,807 INFO L85 PathProgramCache]: Analyzing trace with hash -252389918, now seen corresponding path program 1 times [2023-03-30 23:30:04,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:04,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044445789] [2023-03-30 23:30:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:04,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:05,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:05,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:05,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:05,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2023-03-30 23:30:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:05,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2023-03-30 23:30:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 416 proven. 200 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2023-03-30 23:30:05,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:05,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044445789] [2023-03-30 23:30:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044445789] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:05,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72218714] [2023-03-30 23:30:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:05,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:05,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:05,875 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 23:30:05,878 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 23:30:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:06,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:30:06,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-03-30 23:30:06,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-03-30 23:30:06,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72218714] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:06,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:06,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2023-03-30 23:30:06,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625476203] [2023-03-30 23:30:06,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:06,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 23:30:06,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:06,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 23:30:06,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:30:06,682 INFO L87 Difference]: Start difference. First operand 2050 states and 2251 transitions. Second operand has 13 states, 13 states have (on average 37.0) internal successors, (481), 11 states have internal predecessors, (481), 5 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 23:30:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:08,873 INFO L93 Difference]: Finished difference Result 6138 states and 6896 transitions. [2023-03-30 23:30:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-30 23:30:08,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 37.0) internal successors, (481), 11 states have internal predecessors, (481), 5 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 594 [2023-03-30 23:30:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:08,893 INFO L225 Difference]: With dead ends: 6138 [2023-03-30 23:30:08,893 INFO L226 Difference]: Without dead ends: 3720 [2023-03-30 23:30:08,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1252 GetRequests, 1214 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2023-03-30 23:30:08,901 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2531 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2793 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2535 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:08,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2535 Valid, 95 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2793 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:30:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2023-03-30 23:30:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3356. [2023-03-30 23:30:09,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3280 states have (on average 1.064939024390244) internal successors, (3493), 3316 states have internal predecessors, (3493), 20 states have call successors, (20), 20 states have call predecessors, (20), 55 states have return successors, (196), 19 states have call predecessors, (196), 19 states have call successors, (196) [2023-03-30 23:30:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 3709 transitions. [2023-03-30 23:30:09,012 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 3709 transitions. Word has length 594 [2023-03-30 23:30:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:09,013 INFO L495 AbstractCegarLoop]: Abstraction has 3356 states and 3709 transitions. [2023-03-30 23:30:09,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.0) internal successors, (481), 11 states have internal predecessors, (481), 5 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 23:30:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 3709 transitions. [2023-03-30 23:30:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-03-30 23:30:09,021 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:09,021 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2023-03-30 23:30:09,031 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 23:30:09,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:09,229 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:09,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:09,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1053976441, now seen corresponding path program 1 times [2023-03-30 23:30:09,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:09,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072219073] [2023-03-30 23:30:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:09,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:09,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:10,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:10,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:10,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:10,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-03-30 23:30:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:10,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 519 [2023-03-30 23:30:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 344 proven. 459 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-03-30 23:30:10,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:10,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072219073] [2023-03-30 23:30:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072219073] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620765372] [2023-03-30 23:30:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:10,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:10,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:10,635 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 23:30:10,660 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 23:30:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:10,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:30:10,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 844 proven. 2 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-03-30 23:30:11,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 550 proven. 86 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-03-30 23:30:11,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620765372] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:11,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:11,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 12 [2023-03-30 23:30:11,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932592555] [2023-03-30 23:30:11,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:11,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:30:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:30:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:30:11,866 INFO L87 Difference]: Start difference. First operand 3356 states and 3709 transitions. Second operand has 12 states, 12 states have (on average 50.666666666666664) internal successors, (608), 10 states have internal predecessors, (608), 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 23:30:13,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:13,351 INFO L93 Difference]: Finished difference Result 6740 states and 7520 transitions. [2023-03-30 23:30:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 23:30:13,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 50.666666666666664) internal successors, (608), 10 states have internal predecessors, (608), 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 641 [2023-03-30 23:30:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:13,364 INFO L225 Difference]: With dead ends: 6740 [2023-03-30 23:30:13,364 INFO L226 Difference]: Without dead ends: 3572 [2023-03-30 23:30:13,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1331 GetRequests, 1305 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2023-03-30 23:30:13,371 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2387 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2387 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:13,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2387 Valid, 57 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-30 23:30:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2023-03-30 23:30:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 3544. [2023-03-30 23:30:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3463 states have (on average 1.0583309269419579) internal successors, (3665), 3502 states have internal predecessors, (3665), 21 states have call successors, (21), 21 states have call predecessors, (21), 59 states have return successors, (192), 20 states have call predecessors, (192), 20 states have call successors, (192) [2023-03-30 23:30:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 3878 transitions. [2023-03-30 23:30:13,455 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 3878 transitions. Word has length 641 [2023-03-30 23:30:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:13,455 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 3878 transitions. [2023-03-30 23:30:13,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 50.666666666666664) internal successors, (608), 10 states have internal predecessors, (608), 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 23:30:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 3878 transitions. [2023-03-30 23:30:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-03-30 23:30:13,463 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:13,464 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:30:13,473 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 23:30:13,673 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,SelfDestructingSolverStorable9 [2023-03-30 23:30:13,674 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:13,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1339639452, now seen corresponding path program 1 times [2023-03-30 23:30:13,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:13,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579082336] [2023-03-30 23:30:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:13,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:14,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:14,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:14,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:14,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:14,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-03-30 23:30:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:15,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2023-03-30 23:30:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 581 proven. 93 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-03-30 23:30:15,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:15,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579082336] [2023-03-30 23:30:15,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579082336] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:15,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88577433] [2023-03-30 23:30:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:15,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:15,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:15,103 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 23:30:15,106 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 23:30:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:15,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-30 23:30:15,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 876 proven. 2 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-03-30 23:30:16,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 582 proven. 86 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-03-30 23:30:16,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88577433] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:16,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:16,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 13 [2023-03-30 23:30:16,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568272059] [2023-03-30 23:30:16,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:16,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 23:30:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 23:30:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:30:16,804 INFO L87 Difference]: Start difference. First operand 3544 states and 3878 transitions. Second operand has 13 states, 13 states have (on average 47.84615384615385) internal successors, (622), 11 states have internal predecessors, (622), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-03-30 23:30:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:30:19,021 INFO L93 Difference]: Finished difference Result 6900 states and 7570 transitions. [2023-03-30 23:30:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-03-30 23:30:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 47.84615384615385) internal successors, (622), 11 states have internal predecessors, (622), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 690 [2023-03-30 23:30:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:30:19,033 INFO L225 Difference]: With dead ends: 6900 [2023-03-30 23:30:19,033 INFO L226 Difference]: Without dead ends: 3728 [2023-03-30 23:30:19,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1442 GetRequests, 1408 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2023-03-30 23:30:19,039 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2272 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2275 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:30:19,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2275 Valid, 58 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-30 23:30:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2023-03-30 23:30:19,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3546. [2023-03-30 23:30:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3464 states have (on average 1.0505196304849884) internal successors, (3639), 3504 states have internal predecessors, (3639), 21 states have call successors, (21), 21 states have call predecessors, (21), 60 states have return successors, (172), 20 states have call predecessors, (172), 20 states have call successors, (172) [2023-03-30 23:30:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 3832 transitions. [2023-03-30 23:30:19,118 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 3832 transitions. Word has length 690 [2023-03-30 23:30:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:30:19,119 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 3832 transitions. [2023-03-30 23:30:19,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 47.84615384615385) internal successors, (622), 11 states have internal predecessors, (622), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-03-30 23:30:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 3832 transitions. [2023-03-30 23:30:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2023-03-30 23:30:19,128 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:30:19,128 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:30:19,140 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 23:30:19,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:19,335 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:30:19,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:30:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 108547879, now seen corresponding path program 1 times [2023-03-30 23:30:19,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:30:19,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560839985] [2023-03-30 23:30:19,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:19,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:30:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:30:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:30:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:30:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:30:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-03-30 23:30:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2023-03-30 23:30:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2023-03-30 23:30:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 657 proven. 97 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2023-03-30 23:30:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:30:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560839985] [2023-03-30 23:30:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560839985] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:30:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767850158] [2023-03-30 23:30:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:30:20,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:30:20,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:30:20,725 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 23:30:20,728 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 23:30:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:30:20,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:30:20,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:30:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 1030 proven. 2 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2023-03-30 23:30:21,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:30:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 667 proven. 86 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2023-03-30 23:30:23,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767850158] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:30:23,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:30:23,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2023-03-30 23:30:23,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158429880] [2023-03-30 23:30:23,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:30:23,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 23:30:23,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:30:23,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 23:30:23,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:30:23,290 INFO L87 Difference]: Start difference. First operand 3546 states and 3832 transitions. Second operand has 16 states, 16 states have (on average 40.75) internal successors, (652), 14 states have internal predecessors, (652), 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)