/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_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:41:44,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:41:44,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:41:44,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:41:44,427 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 22:41:44,455 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:41:44,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:41:44,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:41:44,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:41:44,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:41:44,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:41:44,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:41:44,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:41:44,458 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:41:44,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:41:44,459 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:41:44,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:41:44,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:41:44,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:41:44,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:41:44,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:41:44,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:41:44,460 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:41:44,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:41:44,460 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:41:44,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:41:44,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:41:44,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:41:44,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:41:44,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:41:44,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:41:44,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:41:44,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:41:44,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:41:44,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:41:44,461 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:41:44,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:41:44,462 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:41:44,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:41:44,462 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:41:44,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:41:44,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:41:44,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:41:44,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:41:44,706 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:41:44,707 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:41:44,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label28.c [2023-04-01 22:41:45,877 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:41:46,325 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:41:46,326 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label28.c [2023-04-01 22:41:46,354 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0396b12d/72100edc113142e1a858abb44385875b/FLAG98cd52a26 [2023-04-01 22:41:46,369 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0396b12d/72100edc113142e1a858abb44385875b [2023-04-01 22:41:46,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:41:46,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:41:46,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:41:46,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:41:46,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:41:46,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:41:46" (1/1) ... [2023-04-01 22:41:46,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e12afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:46, skipping insertion in model container [2023-04-01 22:41:46,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:41:46" (1/1) ... [2023-04-01 22:41:46,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:41:46,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:41:46,756 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_label28.c[2473,2486] [2023-04-01 22:41:47,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:41:47,546 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:41:47,571 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_label28.c[2473,2486] [2023-04-01 22:41:48,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:41:48,085 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:41:48,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48 WrapperNode [2023-04-01 22:41:48,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:41:48,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:41:48,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:41:48,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:41:48,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (1/1) ... [2023-04-01 22:41:48,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (1/1) ... [2023-04-01 22:41:48,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (1/1) ... [2023-04-01 22:41:48,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (1/1) ... [2023-04-01 22:41:48,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (1/1) ... [2023-04-01 22:41:48,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (1/1) ... [2023-04-01 22:41:48,464 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (1/1) ... [2023-04-01 22:41:48,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (1/1) ... [2023-04-01 22:41:48,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:41:48,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:41:48,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:41:48,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:41:48,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (1/1) ... [2023-04-01 22:41:48,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:41:48,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:41:48,548 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 22:41:48,569 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 22:41:48,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:41:48,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:41:48,589 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:41:48,589 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:41:48,589 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:41:48,589 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:41:48,590 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:41:48,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:41:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:41:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:41:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:41:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:41:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:41:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:41:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:41:48,681 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:41:48,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:41:53,719 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:41:53,733 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:41:53,733 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:41:53,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:41:53 BoogieIcfgContainer [2023-04-01 22:41:53,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:41:53,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:41:53,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:41:53,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:41:53,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:41:46" (1/3) ... [2023-04-01 22:41:53,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43839e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:41:53, skipping insertion in model container [2023-04-01 22:41:53,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:41:48" (2/3) ... [2023-04-01 22:41:53,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43839e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:41:53, skipping insertion in model container [2023-04-01 22:41:53,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:41:53" (3/3) ... [2023-04-01 22:41:53,743 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label28.c [2023-04-01 22:41:53,759 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:41:53,760 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:41:53,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:41:53,838 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;@211b479d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:41:53,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:41:53,846 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 22:41:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 22:41:53,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:41:53,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:41:53,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:41:53,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:41:53,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1150091972, now seen corresponding path program 1 times [2023-04-01 22:41:53,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:41:53,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407248760] [2023-04-01 22:41:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:41:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:41:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:54,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:41:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:41:54,300 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 22:41:54,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:41:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407248760] [2023-04-01 22:41:54,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407248760] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:41:54,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:41:54,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:41:54,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859026730] [2023-04-01 22:41:54,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:41:54,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:41:54,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:41:54,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:41:54,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:41:54,347 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 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 22:42:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:00,449 INFO L93 Difference]: Finished difference Result 3165 states and 5795 transitions. [2023-04-01 22:42:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:42:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 21 [2023-04-01 22:42:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:00,566 INFO L225 Difference]: With dead ends: 3165 [2023-04-01 22:42:00,566 INFO L226 Difference]: Without dead ends: 1961 [2023-04-01 22:42:00,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:42:00,586 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 2927 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4376 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2927 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 4995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 4376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:00,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2927 Valid, 292 Invalid, 4995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 4376 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-01 22:42:00,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-04-01 22:42:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1943. [2023-04-01 22:42:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1918 states have (on average 1.7278415015641293) internal successors, (3314), 1920 states have internal predecessors, (3314), 10 states have call successors, (10), 10 states have call predecessors, (10), 14 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) [2023-04-01 22:42:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3346 transitions. [2023-04-01 22:42:00,733 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3346 transitions. Word has length 21 [2023-04-01 22:42:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:00,734 INFO L495 AbstractCegarLoop]: Abstraction has 1943 states and 3346 transitions. [2023-04-01 22:42:00,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 22:42:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3346 transitions. [2023-04-01 22:42:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 22:42:00,739 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:00,740 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:42:00,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:42:00,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:00,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1186320125, now seen corresponding path program 1 times [2023-04-01 22:42:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:00,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752466100] [2023-04-01 22:42:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:00,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:01,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:42:01,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:01,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752466100] [2023-04-01 22:42:01,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752466100] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:42:01,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:42:01,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:42:01,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681402056] [2023-04-01 22:42:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:42:01,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:42:01,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:42:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:42:01,109 INFO L87 Difference]: Start difference. First operand 1943 states and 3346 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 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 22:42:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:09,001 INFO L93 Difference]: Finished difference Result 6452 states and 11418 transitions. [2023-04-01 22:42:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:42:09,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 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 90 [2023-04-01 22:42:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:09,022 INFO L225 Difference]: With dead ends: 6452 [2023-04-01 22:42:09,023 INFO L226 Difference]: Without dead ends: 4515 [2023-04-01 22:42:09,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:42:09,029 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 6901 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 6734 mSolverCounterSat, 2197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6901 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 8931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2197 IncrementalHoareTripleChecker+Valid, 6734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:09,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6901 Valid, 596 Invalid, 8931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2197 Valid, 6734 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-04-01 22:42:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4515 states. [2023-04-01 22:42:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4515 to 4476. [2023-04-01 22:42:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4388 states have (on average 1.5009115770282588) internal successors, (6586), 4401 states have internal predecessors, (6586), 22 states have call successors, (22), 22 states have call predecessors, (22), 65 states have return successors, (161), 52 states have call predecessors, (161), 21 states have call successors, (161) [2023-04-01 22:42:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 6769 transitions. [2023-04-01 22:42:09,160 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 6769 transitions. Word has length 90 [2023-04-01 22:42:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:09,161 INFO L495 AbstractCegarLoop]: Abstraction has 4476 states and 6769 transitions. [2023-04-01 22:42:09,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 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 22:42:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 6769 transitions. [2023-04-01 22:42:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 22:42:09,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:09,168 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:42:09,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:42:09,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:09,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash 777487393, now seen corresponding path program 1 times [2023-04-01 22:42:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:09,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571993959] [2023-04-01 22:42:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:09,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:42:09,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:09,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571993959] [2023-04-01 22:42:09,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571993959] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:42:09,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:42:09,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:42:09,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094663552] [2023-04-01 22:42:09,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:42:09,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:42:09,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:42:09,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:42:09,545 INFO L87 Difference]: Start difference. First operand 4476 states and 6769 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 4 states have internal predecessors, (86), 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 22:42:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:15,578 INFO L93 Difference]: Finished difference Result 13390 states and 20653 transitions. [2023-04-01 22:42:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:42:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 4 states have internal predecessors, (86), 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 92 [2023-04-01 22:42:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:15,620 INFO L225 Difference]: With dead ends: 13390 [2023-04-01 22:42:15,620 INFO L226 Difference]: Without dead ends: 8920 [2023-04-01 22:42:15,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:42:15,635 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5086 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 6567 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5086 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 7541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 6567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:15,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5086 Valid, 814 Invalid, 7541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 6567 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-01 22:42:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8920 states. [2023-04-01 22:42:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8920 to 8799. [2023-04-01 22:42:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8567 states have (on average 1.345862028714836) internal successors, (11530), 8609 states have internal predecessors, (11530), 42 states have call successors, (42), 42 states have call predecessors, (42), 189 states have return successors, (627), 147 states have call predecessors, (627), 41 states have call successors, (627) [2023-04-01 22:42:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 12199 transitions. [2023-04-01 22:42:15,854 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 12199 transitions. Word has length 92 [2023-04-01 22:42:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:15,856 INFO L495 AbstractCegarLoop]: Abstraction has 8799 states and 12199 transitions. [2023-04-01 22:42:15,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 4 states have internal predecessors, (86), 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 22:42:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 12199 transitions. [2023-04-01 22:42:15,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 22:42:15,861 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:15,862 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:42:15,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:42:15,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:15,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1563896039, now seen corresponding path program 1 times [2023-04-01 22:42:15,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:15,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007823086] [2023-04-01 22:42:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:15,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:16,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:16,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:42:16,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:16,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007823086] [2023-04-01 22:42:16,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007823086] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:42:16,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367544681] [2023-04-01 22:42:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:42:16,201 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 22:42:16,203 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 22:42:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:16,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:42:16,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:42:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:42:16,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:42:16,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367544681] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:42:16,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:42:16,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:42:16,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792894695] [2023-04-01 22:42:16,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:42:16,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:42:16,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:16,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:42:16,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:42:16,397 INFO L87 Difference]: Start difference. First operand 8799 states and 12199 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:42:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:19,713 INFO L93 Difference]: Finished difference Result 25892 states and 37035 transitions. [2023-04-01 22:42:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:42:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 136 [2023-04-01 22:42:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:19,778 INFO L225 Difference]: With dead ends: 25892 [2023-04-01 22:42:19,779 INFO L226 Difference]: Without dead ends: 17099 [2023-04-01 22:42:19,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:42:19,807 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 873 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:19,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 1150 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 22:42:19,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17099 states. [2023-04-01 22:42:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17099 to 17071. [2023-04-01 22:42:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17071 states, 16671 states have (on average 1.2196029032451563) internal successors, (20332), 16742 states have internal predecessors, (20332), 82 states have call successors, (82), 82 states have call predecessors, (82), 317 states have return successors, (1633), 246 states have call predecessors, (1633), 81 states have call successors, (1633) [2023-04-01 22:42:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 22047 transitions. [2023-04-01 22:42:20,303 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 22047 transitions. Word has length 136 [2023-04-01 22:42:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:20,305 INFO L495 AbstractCegarLoop]: Abstraction has 17071 states and 22047 transitions. [2023-04-01 22:42:20,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:42:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 22047 transitions. [2023-04-01 22:42:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-01 22:42:20,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:20,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:42:20,320 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 22:42:20,520 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 22:42:20,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:20,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash 994769011, now seen corresponding path program 1 times [2023-04-01 22:42:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:20,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277509467] [2023-04-01 22:42:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:20,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:20,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:20,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:42:20,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:20,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277509467] [2023-04-01 22:42:20,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277509467] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:42:20,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304935111] [2023-04-01 22:42:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:20,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:20,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:42:20,807 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 22:42:20,837 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 22:42:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:20,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:42:20,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:42:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:42:20,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:42:20,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304935111] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:42:20,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:42:20,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:42:20,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915885337] [2023-04-01 22:42:20,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:42:20,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:42:20,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:20,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:42:20,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:42:20,979 INFO L87 Difference]: Start difference. First operand 17071 states and 22047 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:42:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:23,822 INFO L93 Difference]: Finished difference Result 33334 states and 43327 transitions. [2023-04-01 22:42:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:42:23,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 141 [2023-04-01 22:42:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:23,878 INFO L225 Difference]: With dead ends: 33334 [2023-04-01 22:42:23,878 INFO L226 Difference]: Without dead ends: 17072 [2023-04-01 22:42:23,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:42:23,916 INFO L413 NwaCegarLoop]: 1412 mSDtfsCounter, 1212 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:23,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 1518 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 22:42:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17072 states. [2023-04-01 22:42:24,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17072 to 15465. [2023-04-01 22:42:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15465 states, 15081 states have (on average 1.161925601750547) internal successors, (17523), 15152 states have internal predecessors, (17523), 74 states have call successors, (74), 74 states have call predecessors, (74), 309 states have return successors, (1141), 238 states have call predecessors, (1141), 73 states have call successors, (1141) [2023-04-01 22:42:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15465 states to 15465 states and 18738 transitions. [2023-04-01 22:42:24,309 INFO L78 Accepts]: Start accepts. Automaton has 15465 states and 18738 transitions. Word has length 141 [2023-04-01 22:42:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:24,310 INFO L495 AbstractCegarLoop]: Abstraction has 15465 states and 18738 transitions. [2023-04-01 22:42:24,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:42:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 15465 states and 18738 transitions. [2023-04-01 22:42:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-04-01 22:42:24,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:24,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:24,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 22:42:24,521 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 22:42:24,521 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:24,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2077264346, now seen corresponding path program 1 times [2023-04-01 22:42:24,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:24,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634476654] [2023-04-01 22:42:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:24,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:24,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:24,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:24,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:42:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:42:24,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:24,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634476654] [2023-04-01 22:42:24,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634476654] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:42:24,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905903561] [2023-04-01 22:42:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:24,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:24,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:42:24,872 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 22:42:24,875 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 22:42:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:24,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:42:24,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:42:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:42:25,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:42:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:42:25,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905903561] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:42:25,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:42:25,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:42:25,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082408004] [2023-04-01 22:42:25,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:42:25,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:42:25,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:25,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:42:25,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:42:25,391 INFO L87 Difference]: Start difference. First operand 15465 states and 18738 transitions. Second operand has 11 states, 11 states have (on average 30.636363636363637) internal successors, (337), 9 states have internal predecessors, (337), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 22:42:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:31,651 INFO L93 Difference]: Finished difference Result 44659 states and 56721 transitions. [2023-04-01 22:42:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 22:42:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 30.636363636363637) internal successors, (337), 9 states have internal predecessors, (337), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 210 [2023-04-01 22:42:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:31,761 INFO L225 Difference]: With dead ends: 44659 [2023-04-01 22:42:31,762 INFO L226 Difference]: Without dead ends: 30003 [2023-04-01 22:42:31,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 421 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:42:31,803 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 6833 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 7604 mSolverCounterSat, 1354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6833 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 8958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1354 IncrementalHoareTripleChecker+Valid, 7604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:31,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6833 Valid, 909 Invalid, 8958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1354 Valid, 7604 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-01 22:42:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30003 states. [2023-04-01 22:42:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30003 to 29748. [2023-04-01 22:42:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29748 states, 28733 states have (on average 1.1312776250304528) internal successors, (32505), 28992 states have internal predecessors, (32505), 138 states have call successors, (138), 138 states have call predecessors, (138), 876 states have return successors, (3375), 617 states have call predecessors, (3375), 137 states have call successors, (3375) [2023-04-01 22:42:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29748 states to 29748 states and 36018 transitions. [2023-04-01 22:42:32,440 INFO L78 Accepts]: Start accepts. Automaton has 29748 states and 36018 transitions. Word has length 210 [2023-04-01 22:42:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:32,440 INFO L495 AbstractCegarLoop]: Abstraction has 29748 states and 36018 transitions. [2023-04-01 22:42:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.636363636363637) internal successors, (337), 9 states have internal predecessors, (337), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 22:42:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 29748 states and 36018 transitions. [2023-04-01 22:42:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-04-01 22:42:32,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:32,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:42:32,453 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 22:42:32,654 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 22:42:32,654 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:32,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash 101180781, now seen corresponding path program 1 times [2023-04-01 22:42:32,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:32,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123342953] [2023-04-01 22:42:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:32,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:32,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:32,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:32,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:42:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:42:33,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:33,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123342953] [2023-04-01 22:42:33,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123342953] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:42:33,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172296577] [2023-04-01 22:42:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:33,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:42:33,014 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 22:42:33,042 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 22:42:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:33,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:42:33,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:42:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:42:33,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:42:33,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172296577] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:42:33,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:42:33,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 22:42:33,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477142663] [2023-04-01 22:42:33,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:42:33,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:42:33,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:33,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:42:33,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:42:33,186 INFO L87 Difference]: Start difference. First operand 29748 states and 36018 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 22:42:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:36,772 INFO L93 Difference]: Finished difference Result 66958 states and 83259 transitions. [2023-04-01 22:42:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:42:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 243 [2023-04-01 22:42:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:36,882 INFO L225 Difference]: With dead ends: 66958 [2023-04-01 22:42:36,882 INFO L226 Difference]: Without dead ends: 42122 [2023-04-01 22:42:36,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:42:36,924 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 1020 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2632 mSolverCounterSat, 812 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 2632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:36,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 600 Invalid, 3444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [812 Valid, 2632 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 22:42:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2023-04-01 22:42:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 38805. [2023-04-01 22:42:37,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38805 states, 37612 states have (on average 1.133999787301925) internal successors, (42652), 37914 states have internal predecessors, (42652), 182 states have call successors, (182), 182 states have call predecessors, (182), 1010 states have return successors, (4803), 708 states have call predecessors, (4803), 181 states have call successors, (4803) [2023-04-01 22:42:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38805 states to 38805 states and 47637 transitions. [2023-04-01 22:42:37,790 INFO L78 Accepts]: Start accepts. Automaton has 38805 states and 47637 transitions. Word has length 243 [2023-04-01 22:42:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:37,791 INFO L495 AbstractCegarLoop]: Abstraction has 38805 states and 47637 transitions. [2023-04-01 22:42:37,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 22:42:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 38805 states and 47637 transitions. [2023-04-01 22:42:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-04-01 22:42:37,799 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:37,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:42:37,807 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 22:42:38,005 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 22:42:38,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:38,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash -301742932, now seen corresponding path program 1 times [2023-04-01 22:42:38,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:38,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417978215] [2023-04-01 22:42:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:38,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:38,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:38,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:38,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:42:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 22:42:38,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:38,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417978215] [2023-04-01 22:42:38,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417978215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:42:38,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:42:38,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:42:38,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888197190] [2023-04-01 22:42:38,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:42:38,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 22:42:38,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:38,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 22:42:38,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:42:38,355 INFO L87 Difference]: Start difference. First operand 38805 states and 47637 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 22:42:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:43,353 INFO L93 Difference]: Finished difference Result 72743 states and 89953 transitions. [2023-04-01 22:42:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:42:43,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 287 [2023-04-01 22:42:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:43,458 INFO L225 Difference]: With dead ends: 72743 [2023-04-01 22:42:43,459 INFO L226 Difference]: Without dead ends: 38850 [2023-04-01 22:42:43,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:42:43,507 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 3929 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 5520 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3929 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 5831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 5520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:43,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3929 Valid, 393 Invalid, 5831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 5520 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 22:42:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38850 states. [2023-04-01 22:42:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38850 to 38774. [2023-04-01 22:42:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38774 states, 37587 states have (on average 1.1256551467262617) internal successors, (42310), 37886 states have internal predecessors, (42310), 182 states have call successors, (182), 182 states have call predecessors, (182), 1004 states have return successors, (4390), 705 states have call predecessors, (4390), 181 states have call successors, (4390) [2023-04-01 22:42:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38774 states to 38774 states and 46882 transitions. [2023-04-01 22:42:44,331 INFO L78 Accepts]: Start accepts. Automaton has 38774 states and 46882 transitions. Word has length 287 [2023-04-01 22:42:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:44,333 INFO L495 AbstractCegarLoop]: Abstraction has 38774 states and 46882 transitions. [2023-04-01 22:42:44,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 22:42:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 38774 states and 46882 transitions. [2023-04-01 22:42:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-04-01 22:42:44,341 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:44,341 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:42:44,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 22:42:44,341 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:44,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash 352491075, now seen corresponding path program 1 times [2023-04-01 22:42:44,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:44,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045057600] [2023-04-01 22:42:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:44,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:44,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:44,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:44,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:42:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:44,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:42:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 206 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-01 22:42:44,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045057600] [2023-04-01 22:42:44,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045057600] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:42:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876842797] [2023-04-01 22:42:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:44,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:44,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:42:44,759 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 22:42:44,761 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 22:42:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:44,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:42:44,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:42:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-01 22:42:45,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:42:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-01 22:42:45,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876842797] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:42:45,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:42:45,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:42:45,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489583709] [2023-04-01 22:42:45,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:42:45,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:42:45,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:42:45,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:42:45,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:42:45,389 INFO L87 Difference]: Start difference. First operand 38774 states and 46882 transitions. Second operand has 12 states, 12 states have (on average 34.75) internal successors, (417), 10 states have internal predecessors, (417), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:42:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:42:56,955 INFO L93 Difference]: Finished difference Result 136233 states and 181357 transitions. [2023-04-01 22:42:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 22:42:56,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 34.75) internal successors, (417), 10 states have internal predecessors, (417), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 293 [2023-04-01 22:42:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:42:57,210 INFO L225 Difference]: With dead ends: 136233 [2023-04-01 22:42:57,210 INFO L226 Difference]: Without dead ends: 98268 [2023-04-01 22:42:57,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 603 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:42:57,269 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7639 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 12287 mSolverCounterSat, 3077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7639 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 15364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3077 IncrementalHoareTripleChecker+Valid, 12287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:42:57,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7639 Valid, 1112 Invalid, 15364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3077 Valid, 12287 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-04-01 22:42:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98268 states. [2023-04-01 22:42:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98268 to 98092. [2023-04-01 22:42:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98092 states, 95427 states have (on average 1.1154075890471251) internal successors, (106440), 96154 states have internal predecessors, (106440), 466 states have call successors, (466), 466 states have call predecessors, (466), 2198 states have return successors, (17631), 1471 states have call predecessors, (17631), 465 states have call successors, (17631) [2023-04-01 22:42:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98092 states to 98092 states and 124537 transitions. [2023-04-01 22:42:59,373 INFO L78 Accepts]: Start accepts. Automaton has 98092 states and 124537 transitions. Word has length 293 [2023-04-01 22:42:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:42:59,373 INFO L495 AbstractCegarLoop]: Abstraction has 98092 states and 124537 transitions. [2023-04-01 22:42:59,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.75) internal successors, (417), 10 states have internal predecessors, (417), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:42:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 98092 states and 124537 transitions. [2023-04-01 22:42:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-04-01 22:42:59,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:42:59,382 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:42:59,391 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 22:42:59,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:59,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:42:59,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:42:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1167782691, now seen corresponding path program 1 times [2023-04-01 22:42:59,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:42:59,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46302776] [2023-04-01 22:42:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:59,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:42:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:42:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:59,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:42:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:59,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:42:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:42:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-04-01 22:42:59,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:42:59,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46302776] [2023-04-01 22:42:59,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46302776] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:42:59,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491902988] [2023-04-01 22:42:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:42:59,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:42:59,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:42:59,898 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 22:42:59,923 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 22:43:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:00,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 22:43:00,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:43:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-04-01 22:43:00,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:43:00,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491902988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:43:00,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:43:00,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:43:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606668529] [2023-04-01 22:43:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:43:00,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:43:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:43:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:43:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:43:00,086 INFO L87 Difference]: Start difference. First operand 98092 states and 124537 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 22:43:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:43:05,617 INFO L93 Difference]: Finished difference Result 245901 states and 319688 transitions. [2023-04-01 22:43:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:43:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 293 [2023-04-01 22:43:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:43:06,139 INFO L225 Difference]: With dead ends: 245901 [2023-04-01 22:43:06,139 INFO L226 Difference]: Without dead ends: 148618 [2023-04-01 22:43:06,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:43:06,223 INFO L413 NwaCegarLoop]: 1851 mSDtfsCounter, 887 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:43:06,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 2003 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 3101 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 22:43:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148618 states. [2023-04-01 22:43:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148618 to 146133. [2023-04-01 22:43:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146133 states, 142757 states have (on average 1.1032453750078806) internal successors, (157496), 143596 states have internal predecessors, (157496), 702 states have call successors, (702), 702 states have call predecessors, (702), 2673 states have return successors, (25488), 1834 states have call predecessors, (25488), 701 states have call successors, (25488) [2023-04-01 22:43:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146133 states to 146133 states and 183686 transitions. [2023-04-01 22:43:09,419 INFO L78 Accepts]: Start accepts. Automaton has 146133 states and 183686 transitions. Word has length 293 [2023-04-01 22:43:09,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:43:09,420 INFO L495 AbstractCegarLoop]: Abstraction has 146133 states and 183686 transitions. [2023-04-01 22:43:09,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 22:43:09,420 INFO L276 IsEmpty]: Start isEmpty. Operand 146133 states and 183686 transitions. [2023-04-01 22:43:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-04-01 22:43:09,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:43:09,429 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 22:43:09,440 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 22:43:09,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:43:09,636 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:43:09,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:43:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1684019157, now seen corresponding path program 1 times [2023-04-01 22:43:09,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:43:09,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863852398] [2023-04-01 22:43:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:09,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:43:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:10,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:43:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:10,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:43:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:10,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:43:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:10,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-04-01 22:43:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 47 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:43:10,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:43:10,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863852398] [2023-04-01 22:43:10,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863852398] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:43:10,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265699603] [2023-04-01 22:43:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:10,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:43:10,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:43:10,677 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 22:43:10,687 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 22:43:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:10,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:43:10,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:43:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-04-01 22:43:10,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:43:10,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265699603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:43:10,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:43:10,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-04-01 22:43:10,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401175490] [2023-04-01 22:43:10,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:43:10,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:43:10,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:43:10,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:43:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:43:10,995 INFO L87 Difference]: Start difference. First operand 146133 states and 183686 transitions. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 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 22:43:16,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:43:16,682 INFO L93 Difference]: Finished difference Result 277935 states and 352269 transitions. [2023-04-01 22:43:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:43:16,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 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 299 [2023-04-01 22:43:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:43:17,226 INFO L225 Difference]: With dead ends: 277935 [2023-04-01 22:43:17,227 INFO L226 Difference]: Without dead ends: 145651 [2023-04-01 22:43:17,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:43:17,346 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 2811 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 5295 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 5882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 5295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:43:17,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2811 Valid, 576 Invalid, 5882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 5295 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 22:43:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145651 states. [2023-04-01 22:43:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145651 to 145602. [2023-04-01 22:43:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145602 states, 142125 states have (on average 1.1030290237467018) internal successors, (156768), 143011 states have internal predecessors, (156768), 698 states have call successors, (698), 698 states have call predecessors, (698), 2778 states have return successors, (26376), 1892 states have call predecessors, (26376), 697 states have call successors, (26376) [2023-04-01 22:43:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145602 states to 145602 states and 183842 transitions. [2023-04-01 22:43:20,114 INFO L78 Accepts]: Start accepts. Automaton has 145602 states and 183842 transitions. Word has length 299 [2023-04-01 22:43:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:43:20,115 INFO L495 AbstractCegarLoop]: Abstraction has 145602 states and 183842 transitions. [2023-04-01 22:43:20,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 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 22:43:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 145602 states and 183842 transitions. [2023-04-01 22:43:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2023-04-01 22:43:20,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:43:20,123 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:43:20,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 22:43:20,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:43:20,329 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:43:20,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:43:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash 749651700, now seen corresponding path program 1 times [2023-04-01 22:43:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:43:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899840522] [2023-04-01 22:43:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:20,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:43:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:20,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:43:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:20,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:43:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:20,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:43:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:20,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 22:43:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:20,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2023-04-01 22:43:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 205 proven. 68 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-04-01 22:43:20,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:43:20,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899840522] [2023-04-01 22:43:20,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899840522] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:43:20,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731948013] [2023-04-01 22:43:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:20,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:43:20,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:43:20,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:43:20,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:43:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:21,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 22:43:21,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:43:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 391 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-01 22:43:21,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:43:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 207 proven. 69 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-04-01 22:43:21,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731948013] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:43:21,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:43:21,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2023-04-01 22:43:21,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749781550] [2023-04-01 22:43:21,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:43:21,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 22:43:21,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:43:21,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 22:43:21,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:43:21,440 INFO L87 Difference]: Start difference. First operand 145602 states and 183842 transitions. Second operand has 9 states, 9 states have (on average 35.44444444444444) internal successors, (319), 7 states have internal predecessors, (319), 3 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 22:43:30,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:43:30,866 INFO L93 Difference]: Finished difference Result 334301 states and 421460 transitions. [2023-04-01 22:43:30,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 22:43:30,867 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 35.44444444444444) internal successors, (319), 7 states have internal predecessors, (319), 3 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 361 [2023-04-01 22:43:30,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:43:31,539 INFO L225 Difference]: With dead ends: 334301 [2023-04-01 22:43:31,539 INFO L226 Difference]: Without dead ends: 187064 [2023-04-01 22:43:31,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:43:31,700 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 4658 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 9772 mSolverCounterSat, 1349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4661 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 11121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1349 IncrementalHoareTripleChecker+Valid, 9772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:43:31,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4661 Valid, 509 Invalid, 11121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1349 Valid, 9772 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 22:43:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187064 states. [2023-04-01 22:43:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187064 to 177365. [2023-04-01 22:43:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177365 states, 173943 states have (on average 1.0776001333770258) internal successors, (187441), 174677 states have internal predecessors, (187441), 862 states have call successors, (862), 862 states have call predecessors, (862), 2559 states have return successors, (24301), 1825 states have call predecessors, (24301), 861 states have call successors, (24301) [2023-04-01 22:43:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177365 states to 177365 states and 212604 transitions. [2023-04-01 22:43:35,132 INFO L78 Accepts]: Start accepts. Automaton has 177365 states and 212604 transitions. Word has length 361 [2023-04-01 22:43:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:43:35,132 INFO L495 AbstractCegarLoop]: Abstraction has 177365 states and 212604 transitions. [2023-04-01 22:43:35,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 35.44444444444444) internal successors, (319), 7 states have internal predecessors, (319), 3 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 22:43:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 177365 states and 212604 transitions. [2023-04-01 22:43:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2023-04-01 22:43:35,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:43:35,141 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:43:35,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 22:43:35,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 22:43:35,347 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:43:35,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:43:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash 736183046, now seen corresponding path program 1 times [2023-04-01 22:43:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:43:35,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454776373] [2023-04-01 22:43:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:35,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:43:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:35,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:43:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:43:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:35,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:43:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:36,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2023-04-01 22:43:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 22:43:36,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:43:36,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454776373] [2023-04-01 22:43:36,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454776373] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:43:36,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713051813] [2023-04-01 22:43:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:36,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:43:36,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:43:36,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:43:36,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 22:43:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:36,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:43:36,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:43:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-04-01 22:43:36,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:43:36,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713051813] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:43:36,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:43:36,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 22:43:36,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588383021] [2023-04-01 22:43:36,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:43:36,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:43:36,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:43:36,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:43:36,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:43:36,875 INFO L87 Difference]: Start difference. First operand 177365 states and 212604 transitions. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 4 states have internal predecessors, (293), 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 22:43:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:43:43,198 INFO L93 Difference]: Finished difference Result 369811 states and 443411 transitions. [2023-04-01 22:43:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 22:43:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 4 states have internal predecessors, (293), 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 382 [2023-04-01 22:43:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:43:43,726 INFO L225 Difference]: With dead ends: 369811 [2023-04-01 22:43:43,726 INFO L226 Difference]: Without dead ends: 193255 [2023-04-01 22:43:44,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:43:44,007 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 2620 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 5017 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2620 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 5876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 5017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:43:44,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2620 Valid, 534 Invalid, 5876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 5017 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 22:43:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193255 states. [2023-04-01 22:43:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193255 to 191502. [2023-04-01 22:43:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191502 states, 187756 states have (on average 1.0728392168559193) internal successors, (201432), 188574 states have internal predecessors, (201432), 930 states have call successors, (930), 930 states have call predecessors, (930), 2815 states have return successors, (26066), 1997 states have call predecessors, (26066), 929 states have call successors, (26066) [2023-04-01 22:43:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191502 states to 191502 states and 228428 transitions. [2023-04-01 22:43:47,633 INFO L78 Accepts]: Start accepts. Automaton has 191502 states and 228428 transitions. Word has length 382 [2023-04-01 22:43:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:43:47,634 INFO L495 AbstractCegarLoop]: Abstraction has 191502 states and 228428 transitions. [2023-04-01 22:43:47,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 4 states have internal predecessors, (293), 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 22:43:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 191502 states and 228428 transitions. [2023-04-01 22:43:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-04-01 22:43:47,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:43:47,642 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:43:47,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 22:43:47,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 22:43:47,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:43:47,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:43:47,845 INFO L85 PathProgramCache]: Analyzing trace with hash 832520856, now seen corresponding path program 1 times [2023-04-01 22:43:47,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:43:47,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51300153] [2023-04-01 22:43:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:43:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:48,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:43:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:48,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:43:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:48,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:43:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:48,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2023-04-01 22:43:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 143 proven. 68 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 22:43:48,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:43:48,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51300153] [2023-04-01 22:43:48,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51300153] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:43:48,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783663507] [2023-04-01 22:43:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:43:48,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:43:48,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:43:48,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:43:48,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 22:43:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:43:48,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:43:48,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:43:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-04-01 22:43:49,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:43:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 50 proven. 226 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:43:49,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783663507] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:43:49,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:43:49,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-04-01 22:43:49,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331228560] [2023-04-01 22:43:49,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:43:49,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 22:43:49,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:43:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 22:43:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-04-01 22:43:49,911 INFO L87 Difference]: Start difference. First operand 191502 states and 228428 transitions. Second operand has 17 states, 17 states have (on average 51.11764705882353) internal successors, (869), 15 states have internal predecessors, (869), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:44:06,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 22:44:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:44:24,896 INFO L93 Difference]: Finished difference Result 591825 states and 726206 transitions. [2023-04-01 22:44:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-04-01 22:44:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 51.11764705882353) internal successors, (869), 15 states have internal predecessors, (869), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 389 [2023-04-01 22:44:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:44:26,253 INFO L225 Difference]: With dead ends: 591825 [2023-04-01 22:44:26,253 INFO L226 Difference]: Without dead ends: 398693 [2023-04-01 22:44:26,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 997 GetRequests, 875 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5703 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2264, Invalid=12742, Unknown=0, NotChecked=0, Total=15006 [2023-04-01 22:44:26,418 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 19324 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 28874 mSolverCounterSat, 7177 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19324 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 36052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7177 IncrementalHoareTripleChecker+Valid, 28874 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:44:26,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19324 Valid, 2435 Invalid, 36052 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7177 Valid, 28874 Invalid, 1 Unknown, 0 Unchecked, 28.2s Time] [2023-04-01 22:44:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398693 states. [2023-04-01 22:44:32,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398693 to 359010. [2023-04-01 22:44:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359010 states, 352816 states have (on average 1.071544374404789) internal successors, (378058), 354032 states have internal predecessors, (378058), 1754 states have call successors, (1754), 1754 states have call predecessors, (1754), 4439 states have return successors, (53304), 3223 states have call predecessors, (53304), 1753 states have call successors, (53304) [2023-04-01 22:44:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359010 states to 359010 states and 433116 transitions. [2023-04-01 22:44:34,074 INFO L78 Accepts]: Start accepts. Automaton has 359010 states and 433116 transitions. Word has length 389 [2023-04-01 22:44:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:44:34,074 INFO L495 AbstractCegarLoop]: Abstraction has 359010 states and 433116 transitions. [2023-04-01 22:44:34,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 51.11764705882353) internal successors, (869), 15 states have internal predecessors, (869), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:44:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 359010 states and 433116 transitions. [2023-04-01 22:44:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2023-04-01 22:44:34,079 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:44:34,080 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 22:44:34,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 22:44:34,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 22:44:34,287 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:44:34,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:44:34,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1475469077, now seen corresponding path program 1 times [2023-04-01 22:44:34,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:44:34,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021177457] [2023-04-01 22:44:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:44:34,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:44:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:34,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:44:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:34,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:44:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:35,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:44:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:35,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 22:44:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:35,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2023-04-01 22:44:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 179 proven. 298 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-04-01 22:44:35,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:44:35,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021177457] [2023-04-01 22:44:35,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021177457] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:44:35,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53110633] [2023-04-01 22:44:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:44:35,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:44:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:44:35,350 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:44:35,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 22:44:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:44:35,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 22:44:35,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:44:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 458 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-04-01 22:44:37,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:44:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 65 proven. 417 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-01 22:44:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53110633] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:44:40,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:44:40,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-04-01 22:44:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958447189] [2023-04-01 22:44:40,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:44:40,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:44:40,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:44:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:44:40,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:44:40,603 INFO L87 Difference]: Start difference. First operand 359010 states and 433116 transitions. Second operand has 25 states, 25 states have (on average 36.68) internal successors, (917), 23 states have internal predecessors, (917), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11)