/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:44:34,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:44:34,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:44:34,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:44:34,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:44:34,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:44:34,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:44:34,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:44:34,444 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:44:34,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:44:34,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:44:34,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:44:34,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:44:34,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:44:34,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:44:34,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:44:34,447 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:44:34,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:44:34,447 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:44:34,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:44:34,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:44:34,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:44:34,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:44:34,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:44:34,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:44:34,448 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:44:34,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:44:34,448 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:44:34,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:44:34,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:44:34,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:44:34,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:44:34,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:44:34,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:44:34,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:44:34,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:44:34,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:44:34,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:44:34,450 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:44:34,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:44:34,450 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:44:34,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:44:34,450 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:44:34,451 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:44:34,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:44:34,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:44:34,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:44:34,725 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:44:34,725 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:44:34,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label36.c [2023-04-01 22:44:35,850 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:44:36,270 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:44:36,271 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label36.c [2023-04-01 22:44:36,305 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d66d484e/d8c5852880c14027a0706d8805b22663/FLAGd340c4935 [2023-04-01 22:44:36,319 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d66d484e/d8c5852880c14027a0706d8805b22663 [2023-04-01 22:44:36,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:44:36,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:44:36,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:44:36,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:44:36,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:44:36,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:44:36" (1/1) ... [2023-04-01 22:44:36,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7a334d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:36, skipping insertion in model container [2023-04-01 22:44:36,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:44:36" (1/1) ... [2023-04-01 22:44:36,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:44:36,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:44:36,683 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label36.c[1933,1946] [2023-04-01 22:44:37,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:44:37,607 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:44:37,630 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label36.c[1933,1946] [2023-04-01 22:44:38,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:44:38,071 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:44:38,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38 WrapperNode [2023-04-01 22:44:38,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:44:38,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:44:38,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:44:38,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:44:38,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (1/1) ... [2023-04-01 22:44:38,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (1/1) ... [2023-04-01 22:44:38,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (1/1) ... [2023-04-01 22:44:38,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (1/1) ... [2023-04-01 22:44:38,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (1/1) ... [2023-04-01 22:44:38,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (1/1) ... [2023-04-01 22:44:38,289 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (1/1) ... [2023-04-01 22:44:38,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (1/1) ... [2023-04-01 22:44:38,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:44:38,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:44:38,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:44:38,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:44:38,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (1/1) ... [2023-04-01 22:44:38,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:44:38,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:44:38,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:44:38,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:44:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:44:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:44:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:44:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:44:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:44:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:44:38,401 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:44:38,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:44:38,403 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:44:38,403 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:44:38,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:44:38,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:44:38,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:44:38,407 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:44:38,407 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:44:38,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:44:38,493 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:44:38,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:44:43,475 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:44:43,492 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:44:43,492 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:44:43,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:44:43 BoogieIcfgContainer [2023-04-01 22:44:43,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:44:43,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:44:43,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:44:43,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:44:43,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:44:36" (1/3) ... [2023-04-01 22:44:43,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29966050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:44:43, skipping insertion in model container [2023-04-01 22:44:43,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:44:38" (2/3) ... [2023-04-01 22:44:43,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29966050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:44:43, skipping insertion in model container [2023-04-01 22:44:43,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:44:43" (3/3) ... [2023-04-01 22:44:43,505 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label36.c [2023-04-01 22:44:43,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:44:43,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:44:43,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:44:43,600 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;@6307c7e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:44:43,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:44:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 22:44:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 22:44:43,616 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:44:43,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:44:43,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:44:43,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:44:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1786120172, now seen corresponding path program 1 times [2023-04-01 22:44:43,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:44:43,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800749391] [2023-04-01 22:44:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:44:43,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:44:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:43,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:44:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:44:44,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:44:44,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800749391] [2023-04-01 22:44:44,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800749391] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:44:44,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:44:44,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 22:44:44,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193006827] [2023-04-01 22:44:44,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:44:44,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:44:44,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:44:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:44:44,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:44:44,099 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:44:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:44:53,184 INFO L93 Difference]: Finished difference Result 3973 states and 7416 transitions. [2023-04-01 22:44:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:44:53,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2023-04-01 22:44:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:44:53,209 INFO L225 Difference]: With dead ends: 3973 [2023-04-01 22:44:53,209 INFO L226 Difference]: Without dead ends: 2786 [2023-04-01 22:44:53,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:44:53,221 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 4575 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 6484 mSolverCounterSat, 1924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4575 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 8408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1924 IncrementalHoareTripleChecker+Valid, 6484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:44:53,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4575 Valid, 368 Invalid, 8408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1924 Valid, 6484 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2023-04-01 22:44:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2023-04-01 22:44:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2763. [2023-04-01 22:44:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2723 states have (on average 1.5894234300403967) internal successors, (4328), 2726 states have internal predecessors, (4328), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (53), 22 states have call predecessors, (53), 13 states have call successors, (53) [2023-04-01 22:44:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 4395 transitions. [2023-04-01 22:44:53,405 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 4395 transitions. Word has length 17 [2023-04-01 22:44:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:44:53,406 INFO L495 AbstractCegarLoop]: Abstraction has 2763 states and 4395 transitions. [2023-04-01 22:44:53,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:44:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 4395 transitions. [2023-04-01 22:44:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 22:44:53,413 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:44:53,413 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:44:53,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:44:53,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:44:53,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:44:53,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1079636623, now seen corresponding path program 1 times [2023-04-01 22:44:53,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:44:53,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428366373] [2023-04-01 22:44:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:44:53,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:44:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:53,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:44:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:53,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:44:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:44:53,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:44:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428366373] [2023-04-01 22:44:53,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428366373] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:44:53,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:44:53,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:44:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097329956] [2023-04-01 22:44:53,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:44:53,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:44:53,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:44:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:44:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:44:53,843 INFO L87 Difference]: Start difference. First operand 2763 states and 4395 transitions. Second operand has 7 states, 6 states have (on average 14.5) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:00,607 INFO L93 Difference]: Finished difference Result 8257 states and 13322 transitions. [2023-04-01 22:45:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 22:45:00,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 93 [2023-04-01 22:45:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:00,636 INFO L225 Difference]: With dead ends: 8257 [2023-04-01 22:45:00,637 INFO L226 Difference]: Without dead ends: 5500 [2023-04-01 22:45:00,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:45:00,652 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 3939 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 6931 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3939 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 7894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 6931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:00,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3939 Valid, 729 Invalid, 7894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 6931 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-04-01 22:45:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5500 states. [2023-04-01 22:45:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5500 to 5408. [2023-04-01 22:45:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5408 states, 5302 states have (on average 1.4620897774424746) internal successors, (7752), 5317 states have internal predecessors, (7752), 26 states have call successors, (26), 26 states have call predecessors, (26), 79 states have return successors, (209), 64 states have call predecessors, (209), 25 states have call successors, (209) [2023-04-01 22:45:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 7987 transitions. [2023-04-01 22:45:00,815 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 7987 transitions. Word has length 93 [2023-04-01 22:45:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:00,815 INFO L495 AbstractCegarLoop]: Abstraction has 5408 states and 7987 transitions. [2023-04-01 22:45:00,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 7987 transitions. [2023-04-01 22:45:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 22:45:00,823 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:00,823 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:45:00,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:45:00,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:00,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1654103717, now seen corresponding path program 1 times [2023-04-01 22:45:00,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:00,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183612395] [2023-04-01 22:45:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:00,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:01,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:01,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:01,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183612395] [2023-04-01 22:45:01,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183612395] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:45:01,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:45:01,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:45:01,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758848943] [2023-04-01 22:45:01,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:45:01,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:45:01,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:45:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:45:01,264 INFO L87 Difference]: Start difference. First operand 5408 states and 7987 transitions. Second operand has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:08,108 INFO L93 Difference]: Finished difference Result 16345 states and 25124 transitions. [2023-04-01 22:45:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:45:08,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 107 [2023-04-01 22:45:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:08,155 INFO L225 Difference]: With dead ends: 16345 [2023-04-01 22:45:08,155 INFO L226 Difference]: Without dead ends: 10943 [2023-04-01 22:45:08,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:45:08,168 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 3365 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 7044 mSolverCounterSat, 1203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3365 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 8247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 7044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:08,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3365 Valid, 757 Invalid, 8247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1203 Valid, 7044 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-04-01 22:45:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10943 states. [2023-04-01 22:45:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10943 to 10746. [2023-04-01 22:45:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10746 states, 10407 states have (on average 1.3400595752858653) internal successors, (13946), 10483 states have internal predecessors, (13946), 50 states have call successors, (50), 50 states have call predecessors, (50), 288 states have return successors, (1132), 212 states have call predecessors, (1132), 49 states have call successors, (1132) [2023-04-01 22:45:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10746 states to 10746 states and 15128 transitions. [2023-04-01 22:45:08,432 INFO L78 Accepts]: Start accepts. Automaton has 10746 states and 15128 transitions. Word has length 107 [2023-04-01 22:45:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:08,433 INFO L495 AbstractCegarLoop]: Abstraction has 10746 states and 15128 transitions. [2023-04-01 22:45:08,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 10746 states and 15128 transitions. [2023-04-01 22:45:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-04-01 22:45:08,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:08,441 INFO L195 NwaCegarLoop]: trace histogram [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 22:45:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:45:08,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:08,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash 228369356, now seen corresponding path program 1 times [2023-04-01 22:45:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:08,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760504107] [2023-04-01 22:45:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:08,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:08,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:08,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:09,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:09,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760504107] [2023-04-01 22:45:09,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760504107] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:45:09,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705414081] [2023-04-01 22:45:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:09,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:09,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:45:09,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:45:09,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:45:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:09,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:45:09,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:45:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:10,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:45:10,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705414081] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:45:10,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:45:10,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-04-01 22:45:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792195303] [2023-04-01 22:45:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:45:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:45:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:45:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:45:10,021 INFO L87 Difference]: Start difference. First operand 10746 states and 15128 transitions. Second operand has 5 states, 5 states have (on average 36.2) internal successors, (181), 4 states have internal predecessors, (181), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:14,511 INFO L93 Difference]: Finished difference Result 22864 states and 32242 transitions. [2023-04-01 22:45:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:45:14,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 4 states have internal predecessors, (181), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 187 [2023-04-01 22:45:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:14,557 INFO L225 Difference]: With dead ends: 22864 [2023-04-01 22:45:14,557 INFO L226 Difference]: Without dead ends: 12124 [2023-04-01 22:45:14,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:45:14,583 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 2298 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 5807 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 5990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 5807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:14,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2298 Valid, 646 Invalid, 5990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 5807 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 22:45:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12124 states. [2023-04-01 22:45:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12124 to 11839. [2023-04-01 22:45:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11839 states, 11380 states have (on average 1.3131810193321616) internal successors, (14944), 11502 states have internal predecessors, (14944), 54 states have call successors, (54), 54 states have call predecessors, (54), 404 states have return successors, (1521), 282 states have call predecessors, (1521), 53 states have call successors, (1521) [2023-04-01 22:45:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11839 states to 11839 states and 16519 transitions. [2023-04-01 22:45:14,893 INFO L78 Accepts]: Start accepts. Automaton has 11839 states and 16519 transitions. Word has length 187 [2023-04-01 22:45:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:14,895 INFO L495 AbstractCegarLoop]: Abstraction has 11839 states and 16519 transitions. [2023-04-01 22:45:14,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 4 states have internal predecessors, (181), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 11839 states and 16519 transitions. [2023-04-01 22:45:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 22:45:14,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:14,899 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:45:14,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:45:15,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:15,106 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:15,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:15,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1049286744, now seen corresponding path program 1 times [2023-04-01 22:45:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:15,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208342244] [2023-04-01 22:45:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:15,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:15,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:15,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:15,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:45:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:45:15,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:15,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208342244] [2023-04-01 22:45:15,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208342244] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:45:15,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119192779] [2023-04-01 22:45:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:15,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:15,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:45:15,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:45:15,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:45:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:15,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 22:45:15,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:45:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:45:15,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:45:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119192779] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:45:15,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:45:15,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 22:45:15,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675652300] [2023-04-01 22:45:15,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:45:15,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:45:15,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:45:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:45:15,609 INFO L87 Difference]: Start difference. First operand 11839 states and 16519 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:45:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:18,580 INFO L93 Difference]: Finished difference Result 22686 states and 32233 transitions. [2023-04-01 22:45:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:45:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 217 [2023-04-01 22:45:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:18,624 INFO L225 Difference]: With dead ends: 22686 [2023-04-01 22:45:18,624 INFO L226 Difference]: Without dead ends: 11656 [2023-04-01 22:45:18,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 224 SyntacticMatches, 0 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 22:45:18,652 INFO L413 NwaCegarLoop]: 1560 mSDtfsCounter, 1127 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:18,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1127 Valid, 1729 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 22:45:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11656 states. [2023-04-01 22:45:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11656 to 11656. [2023-04-01 22:45:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11656 states, 11218 states have (on average 1.2134070244250312) internal successors, (13612), 11332 states have internal predecessors, (13612), 54 states have call successors, (54), 54 states have call predecessors, (54), 383 states have return successors, (1257), 269 states have call predecessors, (1257), 53 states have call successors, (1257) [2023-04-01 22:45:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11656 states to 11656 states and 14923 transitions. [2023-04-01 22:45:18,984 INFO L78 Accepts]: Start accepts. Automaton has 11656 states and 14923 transitions. Word has length 217 [2023-04-01 22:45:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:18,985 INFO L495 AbstractCegarLoop]: Abstraction has 11656 states and 14923 transitions. [2023-04-01 22:45:18,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:45:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11656 states and 14923 transitions. [2023-04-01 22:45:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-04-01 22:45:18,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:18,991 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:45:19,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:45:19,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:19,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:19,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:19,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1090632426, now seen corresponding path program 1 times [2023-04-01 22:45:19,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:19,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202501229] [2023-04-01 22:45:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:19,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:19,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:19,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:45:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:19,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2023-04-01 22:45:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 102 proven. 73 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-01 22:45:19,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:19,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202501229] [2023-04-01 22:45:19,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202501229] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:45:19,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181329017] [2023-04-01 22:45:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:19,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:19,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:45:19,689 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:45:19,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:45:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:19,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:45:19,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:45:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 255 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 22:45:19,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:45:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 106 proven. 74 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-01 22:45:20,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181329017] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:45:20,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:45:20,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2023-04-01 22:45:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858545906] [2023-04-01 22:45:20,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:45:20,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 22:45:20,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:20,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 22:45:20,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:45:20,207 INFO L87 Difference]: Start difference. First operand 11656 states and 14923 transitions. Second operand has 13 states, 13 states have (on average 31.53846153846154) internal successors, (410), 11 states have internal predecessors, (410), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:45:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:28,836 INFO L93 Difference]: Finished difference Result 38858 states and 53072 transitions. [2023-04-01 22:45:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 22:45:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 31.53846153846154) internal successors, (410), 11 states have internal predecessors, (410), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 276 [2023-04-01 22:45:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:28,935 INFO L225 Difference]: With dead ends: 38858 [2023-04-01 22:45:28,936 INFO L226 Difference]: Without dead ends: 28011 [2023-04-01 22:45:28,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 563 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2023-04-01 22:45:28,969 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 7766 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 8807 mSolverCounterSat, 3204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7766 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 12011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3204 IncrementalHoareTripleChecker+Valid, 8807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:28,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7766 Valid, 806 Invalid, 12011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3204 Valid, 8807 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-04-01 22:45:28,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28011 states. [2023-04-01 22:45:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28011 to 26180. [2023-04-01 22:45:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26180 states, 25266 states have (on average 1.1413361830127444) internal successors, (28837), 25513 states have internal predecessors, (28837), 122 states have call successors, (122), 122 states have call predecessors, (122), 791 states have return successors, (3564), 544 states have call predecessors, (3564), 121 states have call successors, (3564) [2023-04-01 22:45:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26180 states to 26180 states and 32523 transitions. [2023-04-01 22:45:29,594 INFO L78 Accepts]: Start accepts. Automaton has 26180 states and 32523 transitions. Word has length 276 [2023-04-01 22:45:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:29,594 INFO L495 AbstractCegarLoop]: Abstraction has 26180 states and 32523 transitions. [2023-04-01 22:45:29,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.53846153846154) internal successors, (410), 11 states have internal predecessors, (410), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:45:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 26180 states and 32523 transitions. [2023-04-01 22:45:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-04-01 22:45:29,599 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:29,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:45:29,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:45:29,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:29,806 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:29,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:29,806 INFO L85 PathProgramCache]: Analyzing trace with hash 29523901, now seen corresponding path program 1 times [2023-04-01 22:45:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:29,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794550126] [2023-04-01 22:45:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:29,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:30,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:30,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:30,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:45:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:45:30,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:30,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794550126] [2023-04-01 22:45:30,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794550126] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:45:30,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085502408] [2023-04-01 22:45:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:30,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:30,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:45:30,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:45:30,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:45:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:30,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 22:45:30,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:45:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 22:45:31,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:45:31,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085502408] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:45:31,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:45:31,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2023-04-01 22:45:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143801940] [2023-04-01 22:45:31,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:45:31,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:45:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:45:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:45:31,334 INFO L87 Difference]: Start difference. First operand 26180 states and 32523 transitions. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 4 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:45:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:35,757 INFO L93 Difference]: Finished difference Result 52222 states and 65698 transitions. [2023-04-01 22:45:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:45:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 4 states have internal predecessors, (263), 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 280 [2023-04-01 22:45:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:35,955 INFO L225 Difference]: With dead ends: 52222 [2023-04-01 22:45:35,955 INFO L226 Difference]: Without dead ends: 26851 [2023-04-01 22:45:35,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:45:35,987 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 2466 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 5513 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2466 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 5862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 5513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:35,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2466 Valid, 600 Invalid, 5862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 5513 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 22:45:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26851 states. [2023-04-01 22:45:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26851 to 26441. [2023-04-01 22:45:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26441 states, 25424 states have (on average 1.1402218376337319) internal successors, (28989), 25718 states have internal predecessors, (28989), 122 states have call successors, (122), 122 states have call predecessors, (122), 894 states have return successors, (3949), 600 states have call predecessors, (3949), 121 states have call successors, (3949) [2023-04-01 22:45:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26441 states to 26441 states and 33060 transitions. [2023-04-01 22:45:36,536 INFO L78 Accepts]: Start accepts. Automaton has 26441 states and 33060 transitions. Word has length 280 [2023-04-01 22:45:36,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:36,537 INFO L495 AbstractCegarLoop]: Abstraction has 26441 states and 33060 transitions. [2023-04-01 22:45:36,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 4 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:45:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 26441 states and 33060 transitions. [2023-04-01 22:45:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-04-01 22:45:36,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:36,542 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:45:36,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:45:36,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:36,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:36,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:36,749 INFO L85 PathProgramCache]: Analyzing trace with hash 411817295, now seen corresponding path program 1 times [2023-04-01 22:45:36,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:36,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079415204] [2023-04-01 22:45:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:36,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:37,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:37,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:37,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:45:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:45:37,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:37,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079415204] [2023-04-01 22:45:37,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079415204] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:45:37,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307907815] [2023-04-01 22:45:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:45:37,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:45:37,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:45:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:37,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 22:45:37,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:45:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-04-01 22:45:38,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:45:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:41,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307907815] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:45:41,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:45:41,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 20 [2023-04-01 22:45:41,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787649831] [2023-04-01 22:45:41,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:45:41,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 22:45:41,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 22:45:41,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-04-01 22:45:41,575 INFO L87 Difference]: Start difference. First operand 26441 states and 33060 transitions. Second operand has 20 states, 20 states have (on average 36.05) internal successors, (721), 17 states have internal predecessors, (721), 8 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 22:46:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:46:18,446 INFO L93 Difference]: Finished difference Result 132051 states and 189583 transitions. [2023-04-01 22:46:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2023-04-01 22:46:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 36.05) internal successors, (721), 17 states have internal predecessors, (721), 8 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 287 [2023-04-01 22:46:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:46:19,043 INFO L225 Difference]: With dead ends: 132051 [2023-04-01 22:46:19,043 INFO L226 Difference]: Without dead ends: 102246 [2023-04-01 22:46:19,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 566 SyntacticMatches, 1 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20246 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5838, Invalid=41468, Unknown=0, NotChecked=0, Total=47306 [2023-04-01 22:46:19,111 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 22457 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 35118 mSolverCounterSat, 9003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22457 SdHoareTripleChecker+Valid, 2752 SdHoareTripleChecker+Invalid, 44121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9003 IncrementalHoareTripleChecker+Valid, 35118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:46:19,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22457 Valid, 2752 Invalid, 44121 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9003 Valid, 35118 Invalid, 0 Unknown, 0 Unchecked, 29.3s Time] [2023-04-01 22:46:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102246 states. [2023-04-01 22:46:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102246 to 99749. [2023-04-01 22:46:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99749 states, 97307 states have (on average 1.1205463121872012) internal successors, (109037), 97952 states have internal predecessors, (109037), 478 states have call successors, (478), 478 states have call predecessors, (478), 1963 states have return successors, (19415), 1318 states have call predecessors, (19415), 477 states have call successors, (19415) [2023-04-01 22:46:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99749 states to 99749 states and 128930 transitions. [2023-04-01 22:46:21,892 INFO L78 Accepts]: Start accepts. Automaton has 99749 states and 128930 transitions. Word has length 287 [2023-04-01 22:46:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:46:21,893 INFO L495 AbstractCegarLoop]: Abstraction has 99749 states and 128930 transitions. [2023-04-01 22:46:21,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.05) internal successors, (721), 17 states have internal predecessors, (721), 8 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 22:46:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 99749 states and 128930 transitions. [2023-04-01 22:46:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-04-01 22:46:21,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:46:21,898 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:46:21,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:46:22,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:22,106 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:46:22,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:46:22,106 INFO L85 PathProgramCache]: Analyzing trace with hash 722021452, now seen corresponding path program 1 times [2023-04-01 22:46:22,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:46:22,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685225329] [2023-04-01 22:46:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:22,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:46:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:22,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:46:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:22,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:46:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:23,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:46:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:46:23,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:46:23,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685225329] [2023-04-01 22:46:23,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685225329] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:46:23,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730225940] [2023-04-01 22:46:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:23,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:23,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:46:23,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:46:23,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:46:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:23,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 22:46:23,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:46:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:46:25,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:46:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 21 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:46:30,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730225940] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:46:30,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:46:30,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-04-01 22:46:30,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004699079] [2023-04-01 22:46:30,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:46:30,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:46:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:46:30,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:46:30,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:46:30,047 INFO L87 Difference]: Start difference. First operand 99749 states and 128930 transitions. Second operand has 25 states, 25 states have (on average 36.08) internal successors, (902), 22 states have internal predecessors, (902), 8 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 22:47:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:44,547 INFO L93 Difference]: Finished difference Result 455247 states and 623932 transitions. [2023-04-01 22:47:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2023-04-01 22:47:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 36.08) internal successors, (902), 22 states have internal predecessors, (902), 8 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 316 [2023-04-01 22:47:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:46,246 INFO L225 Difference]: With dead ends: 455247 [2023-04-01 22:47:46,246 INFO L226 Difference]: Without dead ends: 350214 [2023-04-01 22:47:46,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38477 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=10674, Invalid=74298, Unknown=0, NotChecked=0, Total=84972 [2023-04-01 22:47:46,401 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 59496 mSDsluCounter, 2980 mSDsCounter, 0 mSdLazyCounter, 78781 mSolverCounterSat, 13411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59506 SdHoareTripleChecker+Valid, 3328 SdHoareTripleChecker+Invalid, 92192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 13411 IncrementalHoareTripleChecker+Valid, 78781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:46,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59506 Valid, 3328 Invalid, 92192 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [13411 Valid, 78781 Invalid, 0 Unknown, 0 Unchecked, 56.0s Time] [2023-04-01 22:47:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350214 states. [2023-04-01 22:47:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350214 to 209238. [2023-04-01 22:47:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209238 states, 205310 states have (on average 1.0989625444449855) internal successors, (225628), 206165 states have internal predecessors, (225628), 1018 states have call successors, (1018), 1018 states have call predecessors, (1018), 2909 states have return successors, (39749), 2054 states have call predecessors, (39749), 1017 states have call successors, (39749) [2023-04-01 22:47:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209238 states to 209238 states and 266395 transitions. [2023-04-01 22:47:53,272 INFO L78 Accepts]: Start accepts. Automaton has 209238 states and 266395 transitions. Word has length 316 [2023-04-01 22:47:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:53,272 INFO L495 AbstractCegarLoop]: Abstraction has 209238 states and 266395 transitions. [2023-04-01 22:47:53,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 36.08) internal successors, (902), 22 states have internal predecessors, (902), 8 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 22:47:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 209238 states and 266395 transitions. [2023-04-01 22:47:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-04-01 22:47:53,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:53,278 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:47:53,287 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 22:47:53,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:53,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:53,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:53,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1638004683, now seen corresponding path program 1 times [2023-04-01 22:47:53,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211772910] [2023-04-01 22:47:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:53,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:53,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:53,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:53,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:47:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:54,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2023-04-01 22:47:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 131 proven. 89 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:47:54,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:54,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211772910] [2023-04-01 22:47:54,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211772910] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:54,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510362593] [2023-04-01 22:47:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:54,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:54,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:54,089 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 22:47:54,093 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 22:47:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:54,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:47:54,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 297 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 22:47:54,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:47:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 132 proven. 90 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-01 22:47:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510362593] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:47:54,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:47:54,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:47:54,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716906286] [2023-04-01 22:47:54,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:47:54,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:47:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:47:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:47:54,762 INFO L87 Difference]: Start difference. First operand 209238 states and 266395 transitions. Second operand has 11 states, 11 states have (on average 53.54545454545455) internal successors, (589), 9 states have internal predecessors, (589), 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)