/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/Problem15_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:06:31,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:06:31,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:06:31,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:06:31,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:06:31,886 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:06:31,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:06:31,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:06:31,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:06:31,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:06:31,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:06:31,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:06:31,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:06:31,889 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:06:31,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:06:31,890 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:06:31,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:06:31,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:06:31,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:06:31,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:06:31,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:06:31,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:06:31,891 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:06:31,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:06:31,891 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:06:31,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:06:31,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:06:31,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:06:31,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:06:31,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:06:31,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:06:31,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:06:31,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:06:31,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:06:31,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:06:31,893 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:06:31,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:06:31,893 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:06:31,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:06:31,893 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:06:31,894 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:06:32,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:06:32,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:06:32,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:06:32,155 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:06:32,156 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:06:32,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label52.c [2023-04-01 23:06:33,280 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:06:33,653 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:06:33,653 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label52.c [2023-04-01 23:06:33,672 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7de14cf/76b1cf5354d048ccb4efdfc9b5dc090a/FLAG4d39bdda9 [2023-04-01 23:06:33,689 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7de14cf/76b1cf5354d048ccb4efdfc9b5dc090a [2023-04-01 23:06:33,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:06:33,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:06:33,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:06:33,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:06:33,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:06:33,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:06:33" (1/1) ... [2023-04-01 23:06:33,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51532c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:33, skipping insertion in model container [2023-04-01 23:06:33,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:06:33" (1/1) ... [2023-04-01 23:06:33,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:06:33,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:06:33,982 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/Problem15_label52.c[4872,4885] [2023-04-01 23:06:34,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:06:34,388 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:06:34,419 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/Problem15_label52.c[4872,4885] [2023-04-01 23:06:34,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:06:34,692 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:06:34,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34 WrapperNode [2023-04-01 23:06:34,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:06:34,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:06:34,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:06:34,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:06:34,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 23:06:34,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 23:06:34,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 23:06:34,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 23:06:34,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 23:06:34,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 23:06:34,853 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 23:06:34,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 23:06:34,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:06:34,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:06:34,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:06:34,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:06:34,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (1/1) ... [2023-04-01 23:06:34,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:06:34,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:34,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:06:34,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:06:34,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:06:34,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:06:34,949 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:06:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:06:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:06:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:06:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:06:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:06:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:06:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:06:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:06:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:06:35,012 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:06:35,014 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:06:37,308 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:06:37,317 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:06:37,317 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:06:37,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:06:37 BoogieIcfgContainer [2023-04-01 23:06:37,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:06:37,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:06:37,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:06:37,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:06:37,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:06:33" (1/3) ... [2023-04-01 23:06:37,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478acf36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:06:37, skipping insertion in model container [2023-04-01 23:06:37,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:06:34" (2/3) ... [2023-04-01 23:06:37,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478acf36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:06:37, skipping insertion in model container [2023-04-01 23:06:37,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:06:37" (3/3) ... [2023-04-01 23:06:37,326 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label52.c [2023-04-01 23:06:37,341 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:06:37,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:06:37,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:06:37,394 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;@352a654c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:06:37,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:06:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:06:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 23:06:37,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:37,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:06:37,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:37,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:37,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1075067806, now seen corresponding path program 1 times [2023-04-01 23:06:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:37,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988289381] [2023-04-01 23:06:37,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:37,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:06:37,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:37,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988289381] [2023-04-01 23:06:37,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988289381] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:06:37,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:06:37,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:06:37,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412026428] [2023-04-01 23:06:37,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:37,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:06:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:06:37,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:06:37,999 INFO L87 Difference]: Start difference. First operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:06:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:41,247 INFO L93 Difference]: Finished difference Result 1199 states and 2164 transitions. [2023-04-01 23:06:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:06:41,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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 45 [2023-04-01 23:06:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:41,265 INFO L225 Difference]: With dead ends: 1199 [2023-04-01 23:06:41,265 INFO L226 Difference]: Without dead ends: 697 [2023-04-01 23:06:41,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:06:41,278 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 997 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:41,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 84 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 23:06:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2023-04-01 23:06:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 691. [2023-04-01 23:06:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 676 states have (on average 1.4718934911242603) internal successors, (995), 678 states have internal predecessors, (995), 6 states have call successors, (6), 6 states have call predecessors, (6), 8 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 23:06:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1012 transitions. [2023-04-01 23:06:41,355 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1012 transitions. Word has length 45 [2023-04-01 23:06:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:41,356 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 1012 transitions. [2023-04-01 23:06:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:06:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1012 transitions. [2023-04-01 23:06:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 23:06:41,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:41,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:06:41,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:06:41,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:41,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:41,361 INFO L85 PathProgramCache]: Analyzing trace with hash -206047726, now seen corresponding path program 1 times [2023-04-01 23:06:41,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:41,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297995546] [2023-04-01 23:06:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:41,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:41,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:06:41,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:41,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297995546] [2023-04-01 23:06:41,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297995546] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:41,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140134825] [2023-04-01 23:06:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:41,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:41,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:41,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:41,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:06:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:41,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:06:41,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:06:41,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:06:41,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140134825] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:06:41,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:06:41,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:06:41,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807252024] [2023-04-01 23:06:41,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:41,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:06:41,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:06:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:06:41,955 INFO L87 Difference]: Start difference. First operand 691 states and 1012 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-04-01 23:06:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:43,559 INFO L93 Difference]: Finished difference Result 2004 states and 2952 transitions. [2023-04-01 23:06:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:06:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 114 [2023-04-01 23:06:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:43,568 INFO L225 Difference]: With dead ends: 2004 [2023-04-01 23:06:43,568 INFO L226 Difference]: Without dead ends: 1319 [2023-04-01 23:06:43,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:06:43,571 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 297 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:43,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 339 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 23:06:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2023-04-01 23:06:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2023-04-01 23:06:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1291 states have (on average 1.2982184353214563) internal successors, (1676), 1295 states have internal predecessors, (1676), 10 states have call successors, (10), 10 states have call predecessors, (10), 15 states have return successors, (24), 11 states have call predecessors, (24), 9 states have call successors, (24) [2023-04-01 23:06:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1710 transitions. [2023-04-01 23:06:43,619 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1710 transitions. Word has length 114 [2023-04-01 23:06:43,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:43,619 INFO L495 AbstractCegarLoop]: Abstraction has 1317 states and 1710 transitions. [2023-04-01 23:06:43,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-04-01 23:06:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1710 transitions. [2023-04-01 23:06:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-01 23:06:43,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:43,628 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:06:43,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 23:06:43,849 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 [2023-04-01 23:06:43,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:43,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:43,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1471695845, now seen corresponding path program 1 times [2023-04-01 23:06:43,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:43,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234196804] [2023-04-01 23:06:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:43,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:44,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:44,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:44,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-04-01 23:06:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-01 23:06:44,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:44,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234196804] [2023-04-01 23:06:44,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234196804] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:44,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044787644] [2023-04-01 23:06:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:44,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:44,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:44,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:44,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:06:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:44,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 23:06:44,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-01 23:06:44,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:06:44,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044787644] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:06:44,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:06:44,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-01 23:06:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677812812] [2023-04-01 23:06:44,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:06:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:06:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:06:44,953 INFO L87 Difference]: Start difference. First operand 1317 states and 1710 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 23:06:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:47,508 INFO L93 Difference]: Finished difference Result 3608 states and 4796 transitions. [2023-04-01 23:06:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 23:06:47,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 219 [2023-04-01 23:06:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:47,522 INFO L225 Difference]: With dead ends: 3608 [2023-04-01 23:06:47,522 INFO L226 Difference]: Without dead ends: 2297 [2023-04-01 23:06:47,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:06:47,527 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 938 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:47,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 215 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 23:06:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2023-04-01 23:06:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 2272. [2023-04-01 23:06:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2224 states have (on average 1.2279676258992807) internal successors, (2731), 2235 states have internal predecessors, (2731), 16 states have call successors, (16), 16 states have call predecessors, (16), 31 states have return successors, (59), 20 states have call predecessors, (59), 15 states have call successors, (59) [2023-04-01 23:06:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2806 transitions. [2023-04-01 23:06:47,605 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2806 transitions. Word has length 219 [2023-04-01 23:06:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:47,606 INFO L495 AbstractCegarLoop]: Abstraction has 2272 states and 2806 transitions. [2023-04-01 23:06:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 4 states have internal predecessors, (137), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 23:06:47,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2806 transitions. [2023-04-01 23:06:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2023-04-01 23:06:47,617 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:47,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:06:47,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:06:47,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 23:06:47,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:47,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:47,825 INFO L85 PathProgramCache]: Analyzing trace with hash 769483463, now seen corresponding path program 1 times [2023-04-01 23:06:47,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:47,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536031043] [2023-04-01 23:06:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:47,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:48,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:48,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:48,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:06:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 113 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:06:49,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:49,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536031043] [2023-04-01 23:06:49,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536031043] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:49,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575797758] [2023-04-01 23:06:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:49,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:49,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:49,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:06:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:49,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 23:06:49,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-01 23:06:49,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:06:49,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575797758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:06:49,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:06:49,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-01 23:06:49,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744785650] [2023-04-01 23:06:49,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:49,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:06:49,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:49,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:06:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:06:49,965 INFO L87 Difference]: Start difference. First operand 2272 states and 2806 transitions. Second operand has 5 states, 5 states have (on average 56.0) internal successors, (280), 4 states have internal predecessors, (280), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:06:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:52,859 INFO L93 Difference]: Finished difference Result 4896 states and 6011 transitions. [2023-04-01 23:06:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:06:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 56.0) internal successors, (280), 4 states have internal predecessors, (280), 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 325 [2023-04-01 23:06:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:52,871 INFO L225 Difference]: With dead ends: 4896 [2023-04-01 23:06:52,871 INFO L226 Difference]: Without dead ends: 2630 [2023-04-01 23:06:52,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:06:52,877 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 605 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:52,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 179 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 23:06:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2023-04-01 23:06:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2599. [2023-04-01 23:06:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2538 states have (on average 1.2017336485421592) internal successors, (3050), 2556 states have internal predecessors, (3050), 18 states have call successors, (18), 18 states have call predecessors, (18), 42 states have return successors, (85), 24 states have call predecessors, (85), 17 states have call successors, (85) [2023-04-01 23:06:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3153 transitions. [2023-04-01 23:06:52,955 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3153 transitions. Word has length 325 [2023-04-01 23:06:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:52,956 INFO L495 AbstractCegarLoop]: Abstraction has 2599 states and 3153 transitions. [2023-04-01 23:06:52,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.0) internal successors, (280), 4 states have internal predecessors, (280), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:06:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3153 transitions. [2023-04-01 23:06:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-04-01 23:06:52,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:52,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:06:52,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:06:53,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:53,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:53,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:53,170 INFO L85 PathProgramCache]: Analyzing trace with hash -967495426, now seen corresponding path program 1 times [2023-04-01 23:06:53,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:53,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825512814] [2023-04-01 23:06:53,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:53,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:53,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:53,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:53,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-04-01 23:06:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 23:06:53,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:53,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825512814] [2023-04-01 23:06:53,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825512814] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:53,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125269004] [2023-04-01 23:06:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:53,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:53,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:53,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:53,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:06:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:53,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:06:53,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 23:06:53,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:06:53,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125269004] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:06:53,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:06:53,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:06:53,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691227184] [2023-04-01 23:06:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:53,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:06:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:06:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:06:53,834 INFO L87 Difference]: Start difference. First operand 2599 states and 3153 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:06:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:55,484 INFO L93 Difference]: Finished difference Result 6134 states and 7743 transitions. [2023-04-01 23:06:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:06:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 340 [2023-04-01 23:06:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:55,502 INFO L225 Difference]: With dead ends: 6134 [2023-04-01 23:06:55,502 INFO L226 Difference]: Without dead ends: 3848 [2023-04-01 23:06:55,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 345 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:06:55,507 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 338 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:55,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 221 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 23:06:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2023-04-01 23:06:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3848. [2023-04-01 23:06:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3762 states have (on average 1.1977671451355663) internal successors, (4506), 3788 states have internal predecessors, (4506), 26 states have call successors, (26), 26 states have call predecessors, (26), 59 states have return successors, (167), 33 states have call predecessors, (167), 25 states have call successors, (167) [2023-04-01 23:06:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 4699 transitions. [2023-04-01 23:06:55,612 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 4699 transitions. Word has length 340 [2023-04-01 23:06:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:55,612 INFO L495 AbstractCegarLoop]: Abstraction has 3848 states and 4699 transitions. [2023-04-01 23:06:55,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:06:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 4699 transitions. [2023-04-01 23:06:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2023-04-01 23:06:55,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:55,621 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:06:55,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:06:55,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:55,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:55,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1299116479, now seen corresponding path program 1 times [2023-04-01 23:06:55,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:55,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369120050] [2023-04-01 23:06:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:55,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:56,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:56,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:56,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-04-01 23:06:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:56,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2023-04-01 23:06:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 120 proven. 3 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-04-01 23:06:56,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:56,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369120050] [2023-04-01 23:06:56,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369120050] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:56,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743636095] [2023-04-01 23:06:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:56,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:56,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:56,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:56,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:06:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:56,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:06:56,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-04-01 23:06:56,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:06:56,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743636095] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:06:56,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:06:56,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:06:56,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166579899] [2023-04-01 23:06:56,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:56,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:06:56,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:56,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:06:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:06:56,842 INFO L87 Difference]: Start difference. First operand 3848 states and 4699 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:06:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:58,298 INFO L93 Difference]: Finished difference Result 8629 states and 10848 transitions. [2023-04-01 23:06:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:06:58,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 508 [2023-04-01 23:06:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:58,318 INFO L225 Difference]: With dead ends: 8629 [2023-04-01 23:06:58,318 INFO L226 Difference]: Without dead ends: 5094 [2023-04-01 23:06:58,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 516 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:06:58,327 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 297 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:58,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 646 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 23:06:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2023-04-01 23:06:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 5094. [2023-04-01 23:06:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 4985 states have (on average 1.1707121364092277) internal successors, (5836), 5018 states have internal predecessors, (5836), 34 states have call successors, (34), 34 states have call predecessors, (34), 74 states have return successors, (249), 41 states have call predecessors, (249), 33 states have call successors, (249) [2023-04-01 23:06:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 6119 transitions. [2023-04-01 23:06:58,477 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 6119 transitions. Word has length 508 [2023-04-01 23:06:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:58,478 INFO L495 AbstractCegarLoop]: Abstraction has 5094 states and 6119 transitions. [2023-04-01 23:06:58,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:06:58,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 6119 transitions. [2023-04-01 23:06:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-04-01 23:06:58,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:58,490 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:06:58,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 23:06:58,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:58,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:58,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:58,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1419369825, now seen corresponding path program 1 times [2023-04-01 23:06:58,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:58,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2323611] [2023-04-01 23:06:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:58,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:59,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:59,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:59,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:06:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:59,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:06:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 315 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 23:06:59,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:59,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2323611] [2023-04-01 23:06:59,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2323611] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:59,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882956453] [2023-04-01 23:06:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:59,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:59,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:59,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:59,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:06:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:59,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 23:06:59,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:07:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 278 proven. 110 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-01 23:07:00,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:07:02,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882956453] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:02,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:07:02,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-04-01 23:07:02,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443930924] [2023-04-01 23:07:02,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:07:02,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 23:07:02,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:07:02,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 23:07:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:07:02,924 INFO L87 Difference]: Start difference. First operand 5094 states and 6119 transitions. Second operand has 13 states, 13 states have (on average 66.15384615384616) internal successors, (860), 11 states have internal predecessors, (860), 5 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 23:07:18,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:07:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:07:20,411 INFO L93 Difference]: Finished difference Result 21282 states and 27789 transitions. [2023-04-01 23:07:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-04-01 23:07:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 66.15384615384616) internal successors, (860), 11 states have internal predecessors, (860), 5 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 531 [2023-04-01 23:07:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:07:20,466 INFO L225 Difference]: With dead ends: 21282 [2023-04-01 23:07:20,466 INFO L226 Difference]: Without dead ends: 13527 [2023-04-01 23:07:20,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 878 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5880 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1662, Invalid=13838, Unknown=0, NotChecked=0, Total=15500 [2023-04-01 23:07:20,491 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 5607 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 11177 mSolverCounterSat, 2458 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5623 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 13636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2458 IncrementalHoareTripleChecker+Valid, 11177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:07:20,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5623 Valid, 692 Invalid, 13636 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2458 Valid, 11177 Invalid, 1 Unknown, 0 Unchecked, 14.3s Time] [2023-04-01 23:07:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13527 states. [2023-04-01 23:07:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13527 to 11553. [2023-04-01 23:07:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11553 states, 11219 states have (on average 1.1100811123986094) internal successors, (12454), 11393 states have internal predecessors, (12454), 74 states have call successors, (74), 74 states have call predecessors, (74), 259 states have return successors, (1031), 85 states have call predecessors, (1031), 73 states have call successors, (1031) [2023-04-01 23:07:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11553 states to 11553 states and 13559 transitions. [2023-04-01 23:07:20,851 INFO L78 Accepts]: Start accepts. Automaton has 11553 states and 13559 transitions. Word has length 531 [2023-04-01 23:07:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:07:20,852 INFO L495 AbstractCegarLoop]: Abstraction has 11553 states and 13559 transitions. [2023-04-01 23:07:20,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.15384615384616) internal successors, (860), 11 states have internal predecessors, (860), 5 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 23:07:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 11553 states and 13559 transitions. [2023-04-01 23:07:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-04-01 23:07:20,866 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:07:20,866 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:07:20,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 23:07:21,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:21,073 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:07:21,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:07:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1922224530, now seen corresponding path program 1 times [2023-04-01 23:07:21,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:07:21,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005505029] [2023-04-01 23:07:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:21,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:07:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:21,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:07:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:21,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:07:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:21,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:07:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:21,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2023-04-01 23:07:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 352 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 23:07:21,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:07:21,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005505029] [2023-04-01 23:07:21,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005505029] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:21,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045686412] [2023-04-01 23:07:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:21,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:21,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:07:21,993 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) [2023-04-01 23:07:21,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:07:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:22,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 23:07:22,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:07:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 315 proven. 41 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:07:23,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:07:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-04-01 23:07:24,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045686412] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:24,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:07:24,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 12 [2023-04-01 23:07:24,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797016033] [2023-04-01 23:07:24,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:07:24,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:07:24,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:07:24,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:07:24,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:07:24,049 INFO L87 Difference]: Start difference. First operand 11553 states and 13559 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:07:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:07:25,294 INFO L93 Difference]: Finished difference Result 25589 states and 30227 transitions. [2023-04-01 23:07:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:07:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 570 [2023-04-01 23:07:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:07:25,340 INFO L225 Difference]: With dead ends: 25589 [2023-04-01 23:07:25,340 INFO L226 Difference]: Without dead ends: 14349 [2023-04-01 23:07:25,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1141 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:07:25,365 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 281 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:07:25,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 619 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 23:07:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14349 states. [2023-04-01 23:07:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14349 to 14336. [2023-04-01 23:07:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14336 states, 13957 states have (on average 1.097728738267536) internal successors, (15321), 14140 states have internal predecessors, (15321), 92 states have call successors, (92), 92 states have call predecessors, (92), 286 states have return successors, (1209), 103 states have call predecessors, (1209), 91 states have call successors, (1209) [2023-04-01 23:07:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14336 states to 14336 states and 16622 transitions. [2023-04-01 23:07:25,732 INFO L78 Accepts]: Start accepts. Automaton has 14336 states and 16622 transitions. Word has length 570 [2023-04-01 23:07:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:07:25,733 INFO L495 AbstractCegarLoop]: Abstraction has 14336 states and 16622 transitions. [2023-04-01 23:07:25,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:07:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 14336 states and 16622 transitions. [2023-04-01 23:07:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2023-04-01 23:07:25,745 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:07:25,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:07:25,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 23:07:25,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:25,952 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:07:25,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:07:25,953 INFO L85 PathProgramCache]: Analyzing trace with hash -193369072, now seen corresponding path program 1 times [2023-04-01 23:07:25,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:07:25,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431256953] [2023-04-01 23:07:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:25,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:07:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:26,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:07:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:26,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:07:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:26,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:07:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:26,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2023-04-01 23:07:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 378 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 23:07:26,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:07:26,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431256953] [2023-04-01 23:07:26,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431256953] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:26,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148678846] [2023-04-01 23:07:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:26,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:26,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:07:26,813 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) [2023-04-01 23:07:26,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:07:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:27,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:07:27,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:07:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 380 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:07:29,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:07:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 380 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:07:30,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148678846] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:07:30,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:07:30,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2023-04-01 23:07:30,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736757167] [2023-04-01 23:07:30,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:07:30,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 23:07:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:07:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 23:07:30,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:07:30,424 INFO L87 Difference]: Start difference. First operand 14336 states and 16622 transitions. Second operand has 10 states, 10 states have (on average 78.3) internal successors, (783), 8 states have internal predecessors, (783), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:07:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:07:33,297 INFO L93 Difference]: Finished difference Result 39220 states and 46365 transitions. [2023-04-01 23:07:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 23:07:33,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 78.3) internal successors, (783), 8 states have internal predecessors, (783), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 596 [2023-04-01 23:07:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:07:33,370 INFO L225 Difference]: With dead ends: 39220 [2023-04-01 23:07:33,370 INFO L226 Difference]: Without dead ends: 25197 [2023-04-01 23:07:33,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1221 GetRequests, 1202 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-04-01 23:07:33,399 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 3491 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:07:33,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 205 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 23:07:33,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25197 states. [2023-04-01 23:07:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25197 to 22702. [2023-04-01 23:07:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22702 states, 22181 states have (on average 1.0968396375276137) internal successors, (24329), 22397 states have internal predecessors, (24329), 146 states have call successors, (146), 146 states have call predecessors, (146), 374 states have return successors, (2024), 158 states have call predecessors, (2024), 145 states have call successors, (2024) [2023-04-01 23:07:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22702 states to 22702 states and 26499 transitions. [2023-04-01 23:07:33,969 INFO L78 Accepts]: Start accepts. Automaton has 22702 states and 26499 transitions. Word has length 596 [2023-04-01 23:07:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:07:33,970 INFO L495 AbstractCegarLoop]: Abstraction has 22702 states and 26499 transitions. [2023-04-01 23:07:33,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 78.3) internal successors, (783), 8 states have internal predecessors, (783), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:07:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 22702 states and 26499 transitions. [2023-04-01 23:07:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2023-04-01 23:07:34,024 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:07:34,024 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:07:34,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 23:07:34,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 23:07:34,237 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:07:34,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:07:34,238 INFO L85 PathProgramCache]: Analyzing trace with hash -805210254, now seen corresponding path program 1 times [2023-04-01 23:07:34,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:07:34,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465500569] [2023-04-01 23:07:34,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:34,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:07:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:34,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:07:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:34,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:07:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:35,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2023-04-01 23:07:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:35,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 445 [2023-04-01 23:07:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 120 proven. 3 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2023-04-01 23:07:35,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:07:35,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465500569] [2023-04-01 23:07:35,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465500569] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:35,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165522164] [2023-04-01 23:07:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:35,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:07:35,193 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) [2023-04-01 23:07:35,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:07:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:35,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:07:35,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:07:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2023-04-01 23:07:35,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:07:35,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165522164] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:07:35,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:07:35,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:07:35,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658330475] [2023-04-01 23:07:35,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:07:35,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:07:35,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:07:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:07:35,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:07:35,487 INFO L87 Difference]: Start difference. First operand 22702 states and 26499 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:07:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:07:36,860 INFO L93 Difference]: Finished difference Result 47543 states and 55708 transitions. [2023-04-01 23:07:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:07:36,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 675 [2023-04-01 23:07:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:07:36,938 INFO L225 Difference]: With dead ends: 47543 [2023-04-01 23:07:36,938 INFO L226 Difference]: Without dead ends: 25154 [2023-04-01 23:07:36,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 683 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:07:36,973 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 281 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:07:36,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 287 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 23:07:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25154 states. [2023-04-01 23:07:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25154 to 23922. [2023-04-01 23:07:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23922 states, 23387 states have (on average 1.0959079830675162) internal successors, (25630), 23601 states have internal predecessors, (25630), 154 states have call successors, (154), 154 states have call predecessors, (154), 380 states have return successors, (2091), 166 states have call predecessors, (2091), 153 states have call successors, (2091) [2023-04-01 23:07:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23922 states to 23922 states and 27875 transitions. [2023-04-01 23:07:37,533 INFO L78 Accepts]: Start accepts. Automaton has 23922 states and 27875 transitions. Word has length 675 [2023-04-01 23:07:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:07:37,534 INFO L495 AbstractCegarLoop]: Abstraction has 23922 states and 27875 transitions. [2023-04-01 23:07:37,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:07:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 23922 states and 27875 transitions. [2023-04-01 23:07:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2023-04-01 23:07:37,638 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:07:37,638 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:07:37,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 23:07:37,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 23:07:37,839 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:07:37,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:07:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1272354938, now seen corresponding path program 1 times [2023-04-01 23:07:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:07:37,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977570831] [2023-04-01 23:07:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:37,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:07:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:38,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:07:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:38,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:07:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:38,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:07:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:38,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2023-04-01 23:07:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:38,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2023-04-01 23:07:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 325 proven. 191 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-04-01 23:07:38,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:07:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977570831] [2023-04-01 23:07:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977570831] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170805097] [2023-04-01 23:07:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:38,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:38,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:07:38,657 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) [2023-04-01 23:07:38,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:07:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:38,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:07:38,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:07:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 630 proven. 2 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2023-04-01 23:07:39,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:07:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 326 proven. 193 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2023-04-01 23:07:39,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170805097] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:07:39,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:07:39,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:07:39,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678421864] [2023-04-01 23:07:39,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:07:39,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:07:39,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:07:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:07:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:07:39,608 INFO L87 Difference]: Start difference. First operand 23922 states and 27875 transitions. Second operand has 11 states, 11 states have (on average 82.0909090909091) internal successors, (903), 9 states have internal predecessors, (903), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:07:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:07:43,058 INFO L93 Difference]: Finished difference Result 51024 states and 59919 transitions. [2023-04-01 23:07:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:07:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 82.0909090909091) internal successors, (903), 9 states have internal predecessors, (903), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 694 [2023-04-01 23:07:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:07:43,139 INFO L225 Difference]: With dead ends: 51024 [2023-04-01 23:07:43,140 INFO L226 Difference]: Without dead ends: 27415 [2023-04-01 23:07:43,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1431 GetRequests, 1405 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:07:43,173 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 2508 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2508 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 3465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:07:43,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2508 Valid, 281 Invalid, 3465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 23:07:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27415 states. [2023-04-01 23:07:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27415 to 26779. [2023-04-01 23:07:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26779 states, 26168 states have (on average 1.0899189850198716) internal successors, (28521), 26422 states have internal predecessors, (28521), 172 states have call successors, (172), 172 states have call predecessors, (172), 438 states have return successors, (2376), 184 states have call predecessors, (2376), 171 states have call successors, (2376) [2023-04-01 23:07:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26779 states to 26779 states and 31069 transitions. [2023-04-01 23:07:43,860 INFO L78 Accepts]: Start accepts. Automaton has 26779 states and 31069 transitions. Word has length 694 [2023-04-01 23:07:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:07:43,861 INFO L495 AbstractCegarLoop]: Abstraction has 26779 states and 31069 transitions. [2023-04-01 23:07:43,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 82.0909090909091) internal successors, (903), 9 states have internal predecessors, (903), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:07:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 26779 states and 31069 transitions. [2023-04-01 23:07:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2023-04-01 23:07:43,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:07:43,877 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:07:43,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:07:44,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 23:07:44,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:07:44,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:07:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash 339741210, now seen corresponding path program 1 times [2023-04-01 23:07:44,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:07:44,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508168744] [2023-04-01 23:07:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:44,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:07:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:45,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:07:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:45,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:07:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:45,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:07:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:45,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-04-01 23:07:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:45,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 567 [2023-04-01 23:07:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 457 proven. 159 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-04-01 23:07:46,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:07:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508168744] [2023-04-01 23:07:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508168744] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184567981] [2023-04-01 23:07:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:46,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:46,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:07:46,070 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:07:46,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:07:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:46,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:07:46,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:07:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 463 proven. 162 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-01 23:07:47,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:07:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2023-04-01 23:07:48,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184567981] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:48,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:07:48,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 9] total 18 [2023-04-01 23:07:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812273525] [2023-04-01 23:07:48,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:07:48,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:07:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:07:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:07:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-01 23:07:48,241 INFO L87 Difference]: Start difference. First operand 26779 states and 31069 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:07:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:07:49,663 INFO L93 Difference]: Finished difference Result 57263 states and 66790 transitions. [2023-04-01 23:07:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:07:49,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 719 [2023-04-01 23:07:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:07:49,719 INFO L225 Difference]: With dead ends: 57263 [2023-04-01 23:07:49,719 INFO L226 Difference]: Without dead ends: 30797 [2023-04-01 23:07:49,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1456 GetRequests, 1440 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-01 23:07:49,752 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 313 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:07:49,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 469 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 23:07:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30797 states. [2023-04-01 23:07:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30797 to 29855. [2023-04-01 23:07:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29855 states, 29200 states have (on average 1.0882191780821917) internal successors, (31776), 29458 states have internal predecessors, (31776), 192 states have call successors, (192), 192 states have call predecessors, (192), 462 states have return successors, (2608), 204 states have call predecessors, (2608), 191 states have call successors, (2608) [2023-04-01 23:07:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29855 states to 29855 states and 34576 transitions. [2023-04-01 23:07:50,442 INFO L78 Accepts]: Start accepts. Automaton has 29855 states and 34576 transitions. Word has length 719 [2023-04-01 23:07:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:07:50,443 INFO L495 AbstractCegarLoop]: Abstraction has 29855 states and 34576 transitions. [2023-04-01 23:07:50,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:07:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 29855 states and 34576 transitions. [2023-04-01 23:07:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2023-04-01 23:07:50,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:07:50,465 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:07:50,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:07:50,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 23:07:50,673 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:07:50,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:07:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash 21390443, now seen corresponding path program 1 times [2023-04-01 23:07:50,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:07:50,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994659110] [2023-04-01 23:07:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:50,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:07:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:51,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:07:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:51,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:07:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:51,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:07:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:51,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-04-01 23:07:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:51,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 567 [2023-04-01 23:07:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 541 proven. 2 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2023-04-01 23:07:51,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:07:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994659110] [2023-04-01 23:07:51,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994659110] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081096717] [2023-04-01 23:07:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:51,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:51,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:07:51,445 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:07:51,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:07:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:51,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:07:51,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:07:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 544 proven. 2 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 23:07:51,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:07:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 544 proven. 2 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 23:07:52,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081096717] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:07:52,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:07:52,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:07:52,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453012746] [2023-04-01 23:07:52,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:07:52,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:07:52,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:07:52,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:07:52,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:07:52,305 INFO L87 Difference]: Start difference. First operand 29855 states and 34576 transitions. Second operand has 11 states, 11 states have (on average 71.36363636363636) internal successors, (785), 9 states have internal predecessors, (785), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:07:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:07:56,082 INFO L93 Difference]: Finished difference Result 59850 states and 70018 transitions. [2023-04-01 23:07:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 23:07:56,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 71.36363636363636) internal successors, (785), 9 states have internal predecessors, (785), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 758 [2023-04-01 23:07:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:07:56,148 INFO L225 Difference]: With dead ends: 59850 [2023-04-01 23:07:56,149 INFO L226 Difference]: Without dead ends: 30308 [2023-04-01 23:07:56,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1559 GetRequests, 1533 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:07:56,181 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 1984 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 3825 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1987 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 4253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 3825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:07:56,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1987 Valid, 248 Invalid, 4253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 3825 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 23:07:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30308 states. [2023-04-01 23:07:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30308 to 28637. [2023-04-01 23:07:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28637 states, 27993 states have (on average 1.0628371378558925) internal successors, (29752), 28256 states have internal predecessors, (29752), 184 states have call successors, (184), 184 states have call predecessors, (184), 459 states have return successors, (1824), 196 states have call predecessors, (1824), 183 states have call successors, (1824) [2023-04-01 23:07:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28637 states to 28637 states and 31760 transitions. [2023-04-01 23:07:56,805 INFO L78 Accepts]: Start accepts. Automaton has 28637 states and 31760 transitions. Word has length 758 [2023-04-01 23:07:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:07:56,806 INFO L495 AbstractCegarLoop]: Abstraction has 28637 states and 31760 transitions. [2023-04-01 23:07:56,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 71.36363636363636) internal successors, (785), 9 states have internal predecessors, (785), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:07:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 28637 states and 31760 transitions. [2023-04-01 23:07:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2023-04-01 23:07:56,823 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:07:56,823 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:07:56,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-01 23:07:57,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:07:57,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:07:57,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:07:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1052783797, now seen corresponding path program 1 times [2023-04-01 23:07:57,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:07:57,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350566845] [2023-04-01 23:07:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:57,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:07:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:57,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:07:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:57,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:07:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:57,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:07:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:57,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-04-01 23:07:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:58,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 573 [2023-04-01 23:07:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 507 proven. 40 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2023-04-01 23:07:58,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:07:58,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350566845] [2023-04-01 23:07:58,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350566845] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:58,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570462779] [2023-04-01 23:07:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:58,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:07:58,272 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:07:58,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 23:07:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:58,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:07:58,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:07:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 513 proven. 37 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-04-01 23:07:58,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:08:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-04-01 23:08:00,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570462779] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:08:00,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:08:00,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2023-04-01 23:08:00,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603928881] [2023-04-01 23:08:00,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:08:00,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 23:08:00,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 23:08:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:08:00,135 INFO L87 Difference]: Start difference. First operand 28637 states and 31760 transitions. Second operand has 16 states, 16 states have (on average 54.4375) internal successors, (871), 14 states have internal predecessors, (871), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:08:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:08:05,065 INFO L93 Difference]: Finished difference Result 71255 states and 78889 transitions. [2023-04-01 23:08:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:08:05,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 54.4375) internal successors, (871), 14 states have internal predecessors, (871), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 764 [2023-04-01 23:08:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:08:05,154 INFO L225 Difference]: With dead ends: 71255 [2023-04-01 23:08:05,154 INFO L226 Difference]: Without dead ends: 42931 [2023-04-01 23:08:05,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1570 GetRequests, 1543 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=578, Unknown=0, NotChecked=0, Total=812 [2023-04-01 23:08:05,190 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3513 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 5209 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 5862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 5209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:08:05,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 322 Invalid, 5862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 5209 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 23:08:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42931 states. [2023-04-01 23:08:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42931 to 38913. [2023-04-01 23:08:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38913 states, 38078 states have (on average 1.0619255212983876) internal successors, (40436), 38400 states have internal predecessors, (40436), 250 states have call successors, (250), 250 states have call predecessors, (250), 584 states have return successors, (2486), 262 states have call predecessors, (2486), 249 states have call successors, (2486) [2023-04-01 23:08:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38913 states to 38913 states and 43172 transitions. [2023-04-01 23:08:05,969 INFO L78 Accepts]: Start accepts. Automaton has 38913 states and 43172 transitions. Word has length 764 [2023-04-01 23:08:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:08:05,970 INFO L495 AbstractCegarLoop]: Abstraction has 38913 states and 43172 transitions. [2023-04-01 23:08:05,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.4375) internal successors, (871), 14 states have internal predecessors, (871), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:08:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38913 states and 43172 transitions. [2023-04-01 23:08:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2023-04-01 23:08:05,993 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:05,993 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:08:06,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 23:08:06,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 23:08:06,200 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:06,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:06,201 INFO L85 PathProgramCache]: Analyzing trace with hash -856157775, now seen corresponding path program 1 times [2023-04-01 23:08:06,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:06,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835097664] [2023-04-01 23:08:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:06,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:06,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:06,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:08:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:06,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:08:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:06,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-04-01 23:08:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:06,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 573 [2023-04-01 23:08:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:06,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 664 [2023-04-01 23:08:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 610 proven. 2 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2023-04-01 23:08:07,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:07,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835097664] [2023-04-01 23:08:07,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835097664] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:08:07,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891286017] [2023-04-01 23:08:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:07,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:08:07,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:08:07,052 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:08:07,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 23:08:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:07,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:08:07,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:08:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 614 proven. 2 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2023-04-01 23:08:07,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:08:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 614 proven. 2 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2023-04-01 23:08:07,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891286017] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:08:07,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:08:07,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 10 [2023-04-01 23:08:07,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632264127] [2023-04-01 23:08:07,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:08:07,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 23:08:07,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:07,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 23:08:07,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:08:07,943 INFO L87 Difference]: Start difference. First operand 38913 states and 43172 transitions. Second operand has 10 states, 10 states have (on average 69.1) internal successors, (691), 8 states have internal predecessors, (691), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:08:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:08:10,996 INFO L93 Difference]: Finished difference Result 78557 states and 88164 transitions. [2023-04-01 23:08:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 23:08:10,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 69.1) internal successors, (691), 8 states have internal predecessors, (691), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 825 [2023-04-01 23:08:10,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:08:11,079 INFO L225 Difference]: With dead ends: 78557 [2023-04-01 23:08:11,079 INFO L226 Difference]: Without dead ends: 39939 [2023-04-01 23:08:11,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1679 GetRequests, 1663 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:08:11,108 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2070 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2856 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 2856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:08:11,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2075 Valid, 189 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 2856 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 23:08:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39939 states. [2023-04-01 23:08:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39939 to 38861. [2023-04-01 23:08:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38861 states, 38047 states have (on average 1.0558256892790496) internal successors, (40171), 38354 states have internal predecessors, (40171), 250 states have call successors, (250), 250 states have call predecessors, (250), 563 states have return successors, (2246), 256 states have call predecessors, (2246), 249 states have call successors, (2246) [2023-04-01 23:08:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38861 states to 38861 states and 42667 transitions. [2023-04-01 23:08:11,713 INFO L78 Accepts]: Start accepts. Automaton has 38861 states and 42667 transitions. Word has length 825 [2023-04-01 23:08:11,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:08:11,714 INFO L495 AbstractCegarLoop]: Abstraction has 38861 states and 42667 transitions. [2023-04-01 23:08:11,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.1) internal successors, (691), 8 states have internal predecessors, (691), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:08:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 38861 states and 42667 transitions. [2023-04-01 23:08:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2023-04-01 23:08:11,743 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:11,743 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, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:08:11,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 23:08:11,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:08:11,953 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:11,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:11,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1187815045, now seen corresponding path program 1 times [2023-04-01 23:08:11,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:11,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856070592] [2023-04-01 23:08:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:12,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:12,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:08:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:12,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:08:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2023-04-01 23:08:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:12,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 562 [2023-04-01 23:08:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:12,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 641 [2023-04-01 23:08:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:12,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 737 [2023-04-01 23:08:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1739 backedges. 621 proven. 99 refuted. 0 times theorem prover too weak. 1019 trivial. 0 not checked. [2023-04-01 23:08:12,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:12,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856070592] [2023-04-01 23:08:12,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856070592] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:08:12,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805498973] [2023-04-01 23:08:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:12,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:08:12,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:08:12,892 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:08:12,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 23:08:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:13,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:08:13,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:08:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1739 backedges. 1093 proven. 2 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-04-01 23:08:13,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:08:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1739 backedges. 618 proven. 96 refuted. 0 times theorem prover too weak. 1025 trivial. 0 not checked. [2023-04-01 23:08:13,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805498973] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:08:13,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:08:13,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2023-04-01 23:08:13,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430528203] [2023-04-01 23:08:13,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:08:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 23:08:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 23:08:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:08:13,498 INFO L87 Difference]: Start difference. First operand 38861 states and 42667 transitions. Second operand has 10 states, 10 states have (on average 70.0) internal successors, (700), 8 states have internal predecessors, (700), 3 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 23:08:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:08:16,752 INFO L93 Difference]: Finished difference Result 80778 states and 88814 transitions. [2023-04-01 23:08:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 23:08:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 70.0) internal successors, (700), 8 states have internal predecessors, (700), 3 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 898 [2023-04-01 23:08:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:08:16,837 INFO L225 Difference]: With dead ends: 80778 [2023-04-01 23:08:16,837 INFO L226 Difference]: Without dead ends: 43783 [2023-04-01 23:08:16,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1828 GetRequests, 1809 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:08:16,879 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1583 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 3425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:08:16,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1588 Valid, 160 Invalid, 3425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 23:08:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43783 states. [2023-04-01 23:08:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43783 to 39782. [2023-04-01 23:08:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39782 states, 38956 states have (on average 1.0518277030495944) internal successors, (40975), 39263 states have internal predecessors, (40975), 256 states have call successors, (256), 256 states have call predecessors, (256), 569 states have return successors, (2198), 262 states have call predecessors, (2198), 255 states have call successors, (2198) [2023-04-01 23:08:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39782 states to 39782 states and 43429 transitions. [2023-04-01 23:08:17,506 INFO L78 Accepts]: Start accepts. Automaton has 39782 states and 43429 transitions. Word has length 898 [2023-04-01 23:08:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:08:17,506 INFO L495 AbstractCegarLoop]: Abstraction has 39782 states and 43429 transitions. [2023-04-01 23:08:17,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 70.0) internal successors, (700), 8 states have internal predecessors, (700), 3 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 23:08:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 39782 states and 43429 transitions. [2023-04-01 23:08:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2023-04-01 23:08:17,535 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:17,536 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:08:17,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-01 23:08:17,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 23:08:17,743 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:17,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1698002201, now seen corresponding path program 1 times [2023-04-01 23:08:17,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:17,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294600899] [2023-04-01 23:08:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:17,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:18,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:18,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:08:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:18,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:08:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:18,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 573 [2023-04-01 23:08:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:18,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 791 [2023-04-01 23:08:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 595 proven. 153 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2023-04-01 23:08:18,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:18,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294600899] [2023-04-01 23:08:18,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294600899] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:08:18,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3348349] [2023-04-01 23:08:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:18,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:08:18,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:08:18,857 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:08:18,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 23:08:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:19,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:08:19,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:08:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 618 proven. 2 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2023-04-01 23:08:19,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:08:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 618 proven. 2 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2023-04-01 23:08:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3348349] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:08:19,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:08:19,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:08:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714005229] [2023-04-01 23:08:19,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:08:19,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:08:19,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:08:19,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:08:19,689 INFO L87 Difference]: Start difference. First operand 39782 states and 43429 transitions. Second operand has 11 states, 11 states have (on average 77.54545454545455) internal successors, (853), 9 states have internal predecessors, (853), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:08:22,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:08:22,559 INFO L93 Difference]: Finished difference Result 71879 states and 77607 transitions. [2023-04-01 23:08:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 23:08:22,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 77.54545454545455) internal successors, (853), 9 states have internal predecessors, (853), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 982 [2023-04-01 23:08:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:08:22,610 INFO L225 Difference]: With dead ends: 71879 [2023-04-01 23:08:22,610 INFO L226 Difference]: Without dead ends: 32410 [2023-04-01 23:08:22,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1997 GetRequests, 1977 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2023-04-01 23:08:22,628 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2717 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2723 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2720 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:08:22,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2720 Valid, 155 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2723 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 23:08:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32410 states. [2023-04-01 23:08:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32410 to 30538. [2023-04-01 23:08:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30538 states, 29840 states have (on average 1.0333109919571046) internal successors, (30834), 30144 states have internal predecessors, (30834), 196 states have call successors, (196), 196 states have call predecessors, (196), 501 states have return successors, (1211), 197 states have call predecessors, (1211), 195 states have call successors, (1211) [2023-04-01 23:08:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30538 states to 30538 states and 32241 transitions. [2023-04-01 23:08:23,010 INFO L78 Accepts]: Start accepts. Automaton has 30538 states and 32241 transitions. Word has length 982 [2023-04-01 23:08:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:08:23,010 INFO L495 AbstractCegarLoop]: Abstraction has 30538 states and 32241 transitions. [2023-04-01 23:08:23,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 77.54545454545455) internal successors, (853), 9 states have internal predecessors, (853), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:08:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 30538 states and 32241 transitions. [2023-04-01 23:08:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1111 [2023-04-01 23:08:23,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:23,054 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, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:08:23,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-01 23:08:23,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 23:08:23,261 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:23,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1691614027, now seen corresponding path program 1 times [2023-04-01 23:08:23,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:23,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992189545] [2023-04-01 23:08:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:23,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:24,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:24,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:08:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:24,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2023-04-01 23:08:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:25,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 445 [2023-04-01 23:08:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:25,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 613 [2023-04-01 23:08:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:25,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 831 [2023-04-01 23:08:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:25,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 919 [2023-04-01 23:08:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 297 proven. 1344 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2023-04-01 23:08:25,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:25,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992189545] [2023-04-01 23:08:25,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992189545] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:08:25,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568794775] [2023-04-01 23:08:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:25,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:08:25,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:08:25,398 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:08:25,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-01 23:08:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:25,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 23:08:25,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:08:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 1508 proven. 2 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2023-04-01 23:08:26,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:08:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 245 proven. 1405 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2023-04-01 23:08:29,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568794775] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:08:29,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:08:29,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2023-04-01 23:08:29,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056710197] [2023-04-01 23:08:29,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:08:29,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 23:08:29,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 23:08:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2023-04-01 23:08:29,605 INFO L87 Difference]: Start difference. First operand 30538 states and 32241 transitions. Second operand has 22 states, 22 states have (on average 79.18181818181819) internal successors, (1742), 20 states have internal predecessors, (1742), 8 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 23:08:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:08:38,097 INFO L93 Difference]: Finished difference Result 65011 states and 69019 transitions. [2023-04-01 23:08:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-04-01 23:08:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 79.18181818181819) internal successors, (1742), 20 states have internal predecessors, (1742), 8 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 1110 [2023-04-01 23:08:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:08:38,164 INFO L225 Difference]: With dead ends: 65011 [2023-04-01 23:08:38,164 INFO L226 Difference]: Without dead ends: 35669 [2023-04-01 23:08:38,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2343 GetRequests, 2265 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1257, Invalid=4905, Unknown=0, NotChecked=0, Total=6162 [2023-04-01 23:08:38,196 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6207 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 7079 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6215 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 8023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 7079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:08:38,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6215 Valid, 410 Invalid, 8023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 7079 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 23:08:38,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35669 states. [2023-04-01 23:08:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35669 to 32388. [2023-04-01 23:08:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32388 states, 31665 states have (on average 1.0320227380388443) internal successors, (32679), 31970 states have internal predecessors, (32679), 208 states have call successors, (208), 208 states have call predecessors, (208), 514 states have return successors, (1254), 209 states have call predecessors, (1254), 207 states have call successors, (1254) [2023-04-01 23:08:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32388 states to 32388 states and 34141 transitions. [2023-04-01 23:08:38,673 INFO L78 Accepts]: Start accepts. Automaton has 32388 states and 34141 transitions. Word has length 1110 [2023-04-01 23:08:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:08:38,673 INFO L495 AbstractCegarLoop]: Abstraction has 32388 states and 34141 transitions. [2023-04-01 23:08:38,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 79.18181818181819) internal successors, (1742), 20 states have internal predecessors, (1742), 8 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 23:08:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 32388 states and 34141 transitions. [2023-04-01 23:08:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1148 [2023-04-01 23:08:38,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:38,711 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, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:08:38,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-01 23:08:38,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 23:08:38,912 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:38,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:38,913 INFO L85 PathProgramCache]: Analyzing trace with hash 20025353, now seen corresponding path program 1 times [2023-04-01 23:08:38,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:38,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130478537] [2023-04-01 23:08:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:38,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:40,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:40,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:08:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:41,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:08:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:41,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2023-04-01 23:08:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:41,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 650 [2023-04-01 23:08:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:41,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 868 [2023-04-01 23:08:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:41,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 956 [2023-04-01 23:08:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 8 proven. 273 refuted. 0 times theorem prover too weak. 2125 trivial. 0 not checked. [2023-04-01 23:08:41,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:41,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130478537] [2023-04-01 23:08:41,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130478537] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:08:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508462462] [2023-04-01 23:08:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:41,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:08:41,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:08:41,885 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:08:41,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-01 23:08:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:42,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 23:08:42,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:09:56,933 WARN L223 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 188 DAG size of output: 129 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 23:09:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 23 proven. 1188 refuted. 0 times theorem prover too weak. 1195 trivial. 0 not checked. [2023-04-01 23:09:59,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:10:01,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508462462] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:10:01,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:10:01,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2023-04-01 23:10:01,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850506679] [2023-04-01 23:10:01,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:10:01,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 23:10:01,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:10:01,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 23:10:01,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2023-04-01 23:10:01,116 INFO L87 Difference]: Start difference. First operand 32388 states and 34141 transitions. Second operand has 18 states, 18 states have (on average 44.05555555555556) internal successors, (793), 15 states have internal predecessors, (793), 7 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:10:03,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:10:07,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]