/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/Problem11_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:17:35,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:17:35,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:17:35,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:17:35,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:17:35,260 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:17:35,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:17:35,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:17:35,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:17:35,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:17:35,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:17:35,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:17:35,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:17:35,262 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:17:35,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:17:35,262 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:17:35,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:17:35,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:17:35,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:17:35,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:17:35,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:17:35,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:17:35,263 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:17:35,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:17:35,263 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:17:35,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:17:35,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:17:35,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:17:35,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:17:35,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:17:35,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:17:35,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:17:35,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:17:35,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:17:35,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:17:35,264 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:17:35,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:17:35,265 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:17:35,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:17:35,265 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:17:35,265 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:17:35,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:17:35,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:17:35,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:17:35,497 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:17:35,497 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:17:35,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label46.c [2023-03-30 23:17:36,677 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:17:36,967 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:17:36,968 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label46.c [2023-03-30 23:17:36,981 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b665dc283/2718259a6cfc49b0a1c5e2042c0b0abb/FLAGb53b4be0c [2023-03-30 23:17:36,996 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b665dc283/2718259a6cfc49b0a1c5e2042c0b0abb [2023-03-30 23:17:36,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:17:37,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:17:37,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:17:37,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:17:37,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:17:37,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:17:36" (1/1) ... [2023-03-30 23:17:37,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6092a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37, skipping insertion in model container [2023-03-30 23:17:37,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:17:36" (1/1) ... [2023-03-30 23:17:37,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:17:37,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:17:37,283 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/Problem11_label46.c[8949,8962] [2023-03-30 23:17:37,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:17:37,543 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:17:37,585 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/Problem11_label46.c[8949,8962] [2023-03-30 23:17:37,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:17:37,770 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:17:37,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37 WrapperNode [2023-03-30 23:17:37,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:17:37,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:17:37,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:17:37,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:17:37,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (1/1) ... [2023-03-30 23:17:37,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (1/1) ... [2023-03-30 23:17:37,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (1/1) ... [2023-03-30 23:17:37,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (1/1) ... [2023-03-30 23:17:37,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (1/1) ... [2023-03-30 23:17:37,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (1/1) ... [2023-03-30 23:17:37,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (1/1) ... [2023-03-30 23:17:37,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (1/1) ... [2023-03-30 23:17:37,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:17:37,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:17:37,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:17:37,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:17:37,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (1/1) ... [2023-03-30 23:17:37,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:17:37,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:37,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:17:37,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:17:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:17:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:17:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:17:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:17:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:17:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:17:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:17:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:17:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:17:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:17:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:17:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:17:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:17:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:17:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:17:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:17:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:17:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:17:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:17:38,069 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:17:38,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:17:39,523 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:17:39,531 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:17:39,531 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:17:39,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:17:39 BoogieIcfgContainer [2023-03-30 23:17:39,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:17:39,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:17:39,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:17:39,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:17:39,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:17:36" (1/3) ... [2023-03-30 23:17:39,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa2a27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:17:39, skipping insertion in model container [2023-03-30 23:17:39,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:37" (2/3) ... [2023-03-30 23:17:39,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa2a27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:17:39, skipping insertion in model container [2023-03-30 23:17:39,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:17:39" (3/3) ... [2023-03-30 23:17:39,542 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label46.c [2023-03-30 23:17:39,558 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:17:39,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:17:39,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:17:39,615 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;@4c38cffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:17:39,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:17:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 292 states, 284 states have (on average 1.7077464788732395) internal successors, (485), 285 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:17:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-30 23:17:39,628 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:39,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:39,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:39,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash -137929999, now seen corresponding path program 1 times [2023-03-30 23:17:39,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:39,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784058780] [2023-03-30 23:17:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:39,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:40,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:40,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:40,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784058780] [2023-03-30 23:17:40,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784058780] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:40,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:17:40,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:17:40,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615873227] [2023-03-30 23:17:40,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:17:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:17:40,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:17:40,381 INFO L87 Difference]: Start difference. First operand has 292 states, 284 states have (on average 1.7077464788732395) internal successors, (485), 285 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:17:42,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:42,077 INFO L93 Difference]: Finished difference Result 806 states and 1404 transitions. [2023-03-30 23:17:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:17:42,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 68 [2023-03-30 23:17:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:42,105 INFO L225 Difference]: With dead ends: 806 [2023-03-30 23:17:42,105 INFO L226 Difference]: Without dead ends: 434 [2023-03-30 23:17:42,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:17:42,131 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 644 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:42,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 56 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:17:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-03-30 23:17:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 428. [2023-03-30 23:17:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 418 states have (on average 1.4497607655502391) internal successors, (606), 420 states have internal predecessors, (606), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:17:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 617 transitions. [2023-03-30 23:17:42,194 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 617 transitions. Word has length 68 [2023-03-30 23:17:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:42,195 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 617 transitions. [2023-03-30 23:17:42,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:17:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 617 transitions. [2023-03-30 23:17:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-03-30 23:17:42,199 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:42,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:17:42,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:17:42,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:42,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:42,200 INFO L85 PathProgramCache]: Analyzing trace with hash -995342388, now seen corresponding path program 1 times [2023-03-30 23:17:42,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:42,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131283909] [2023-03-30 23:17:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:42,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:42,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:42,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:42,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:42,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131283909] [2023-03-30 23:17:42,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131283909] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:42,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:17:42,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:17:42,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291389728] [2023-03-30 23:17:42,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:17:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:17:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:17:42,789 INFO L87 Difference]: Start difference. First operand 428 states and 617 transitions. Second operand has 8 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:17:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:44,790 INFO L93 Difference]: Finished difference Result 1661 states and 2472 transitions. [2023-03-30 23:17:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-30 23:17:44,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 140 [2023-03-30 23:17:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:44,802 INFO L225 Difference]: With dead ends: 1661 [2023-03-30 23:17:44,802 INFO L226 Difference]: Without dead ends: 1239 [2023-03-30 23:17:44,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:17:44,806 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1653 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:44,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1653 Valid, 154 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-30 23:17:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-03-30 23:17:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1203. [2023-03-30 23:17:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1178 states have (on average 1.3837011884550086) internal successors, (1630), 1187 states have internal predecessors, (1630), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (49), 7 states have call predecessors, (49), 7 states have call successors, (49) [2023-03-30 23:17:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1687 transitions. [2023-03-30 23:17:44,913 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1687 transitions. Word has length 140 [2023-03-30 23:17:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:44,914 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1687 transitions. [2023-03-30 23:17:44,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:17:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1687 transitions. [2023-03-30 23:17:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-03-30 23:17:44,920 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:44,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:17:44,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:17:44,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:44,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:44,922 INFO L85 PathProgramCache]: Analyzing trace with hash -699121688, now seen corresponding path program 1 times [2023-03-30 23:17:44,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:44,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572624886] [2023-03-30 23:17:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:45,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:45,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:45,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:45,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572624886] [2023-03-30 23:17:45,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572624886] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:45,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128175748] [2023-03-30 23:17:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:45,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:45,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:45,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:45,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:17:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:45,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:17:45,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:45,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:17:45,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128175748] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:45,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:17:45,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-30 23:17:45,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054157507] [2023-03-30 23:17:45,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:45,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:17:45,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:17:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:17:45,896 INFO L87 Difference]: Start difference. First operand 1203 states and 1687 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:17:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:47,066 INFO L93 Difference]: Finished difference Result 3019 states and 4196 transitions. [2023-03-30 23:17:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 23:17:47,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 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 142 [2023-03-30 23:17:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:47,077 INFO L225 Difference]: With dead ends: 3019 [2023-03-30 23:17:47,077 INFO L226 Difference]: Without dead ends: 1822 [2023-03-30 23:17:47,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:17:47,081 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 495 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:47,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 130 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-30 23:17:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2023-03-30 23:17:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1612. [2023-03-30 23:17:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1567 states have (on average 1.2999361837906829) internal successors, (2037), 1592 states have internal predecessors, (2037), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (106), 9 states have call predecessors, (106), 9 states have call successors, (106) [2023-03-30 23:17:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2153 transitions. [2023-03-30 23:17:47,140 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2153 transitions. Word has length 142 [2023-03-30 23:17:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:47,145 INFO L495 AbstractCegarLoop]: Abstraction has 1612 states and 2153 transitions. [2023-03-30 23:17:47,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:17:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2153 transitions. [2023-03-30 23:17:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-03-30 23:17:47,153 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:47,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:17:47,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:17:47,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:47,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:47,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:47,360 INFO L85 PathProgramCache]: Analyzing trace with hash 51206438, now seen corresponding path program 1 times [2023-03-30 23:17:47,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:47,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633684084] [2023-03-30 23:17:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:47,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:47,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:47,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633684084] [2023-03-30 23:17:47,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633684084] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:47,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465638976] [2023-03-30 23:17:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:47,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:47,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:47,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:47,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:17:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:17:47,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:47,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:17:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465638976] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:47,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:17:47,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:17:47,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430503430] [2023-03-30 23:17:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:47,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:17:47,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:47,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:17:47,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:17:47,879 INFO L87 Difference]: Start difference. First operand 1612 states and 2153 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:17:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:48,630 INFO L93 Difference]: Finished difference Result 3805 states and 5133 transitions. [2023-03-30 23:17:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:17:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 184 [2023-03-30 23:17:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:48,640 INFO L225 Difference]: With dead ends: 3805 [2023-03-30 23:17:48,640 INFO L226 Difference]: Without dead ends: 2199 [2023-03-30 23:17:48,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:17:48,644 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 151 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:48,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 320 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 23:17:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2023-03-30 23:17:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 1995. [2023-03-30 23:17:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1943 states have (on average 1.2691713844570252) internal successors, (2466), 1971 states have internal predecessors, (2466), 12 states have call successors, (12), 12 states have call predecessors, (12), 39 states have return successors, (143), 11 states have call predecessors, (143), 11 states have call successors, (143) [2023-03-30 23:17:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2621 transitions. [2023-03-30 23:17:48,696 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 2621 transitions. Word has length 184 [2023-03-30 23:17:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:48,697 INFO L495 AbstractCegarLoop]: Abstraction has 1995 states and 2621 transitions. [2023-03-30 23:17:48,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:17:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 2621 transitions. [2023-03-30 23:17:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-03-30 23:17:48,700 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:48,706 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:48,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:17:48,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:17:48,918 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:48,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:48,918 INFO L85 PathProgramCache]: Analyzing trace with hash 684955613, now seen corresponding path program 1 times [2023-03-30 23:17:48,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:48,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206850796] [2023-03-30 23:17:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:48,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:49,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:49,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:49,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:17:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-03-30 23:17:49,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:49,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206850796] [2023-03-30 23:17:49,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206850796] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:49,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022230148] [2023-03-30 23:17:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:49,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:49,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:49,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:49,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:17:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:49,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-30 23:17:49,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 71 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:50,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:17:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-03-30 23:17:51,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022230148] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:51,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:17:51,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 9] total 13 [2023-03-30 23:17:51,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666871273] [2023-03-30 23:17:51,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:51,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:17:51,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:17:51,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:17:51,172 INFO L87 Difference]: Start difference. First operand 1995 states and 2621 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:17:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:51,973 INFO L93 Difference]: Finished difference Result 4758 states and 6524 transitions. [2023-03-30 23:17:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:17:51,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 258 [2023-03-30 23:17:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:51,986 INFO L225 Difference]: With dead ends: 4758 [2023-03-30 23:17:51,987 INFO L226 Difference]: Without dead ends: 2769 [2023-03-30 23:17:51,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:17:51,992 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 138 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:51,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 390 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 23:17:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2023-03-30 23:17:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2769. [2023-03-30 23:17:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2699 states have (on average 1.2534271952575027) internal successors, (3383), 2737 states have internal predecessors, (3383), 16 states have call successors, (16), 16 states have call predecessors, (16), 53 states have return successors, (264), 15 states have call predecessors, (264), 15 states have call successors, (264) [2023-03-30 23:17:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 3663 transitions. [2023-03-30 23:17:52,064 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 3663 transitions. Word has length 258 [2023-03-30 23:17:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:52,065 INFO L495 AbstractCegarLoop]: Abstraction has 2769 states and 3663 transitions. [2023-03-30 23:17:52,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:17:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 3663 transitions. [2023-03-30 23:17:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2023-03-30 23:17:52,070 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:52,071 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:52,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:17:52,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:52,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:52,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:52,277 INFO L85 PathProgramCache]: Analyzing trace with hash -171959072, now seen corresponding path program 1 times [2023-03-30 23:17:52,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:52,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535147334] [2023-03-30 23:17:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:52,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:17:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 23:17:52,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:52,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535147334] [2023-03-30 23:17:52,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535147334] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:52,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940861264] [2023-03-30 23:17:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:52,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:52,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:52,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:52,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:17:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 23:17:52,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-03-30 23:17:53,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:17:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-03-30 23:17:53,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940861264] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:53,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:17:53,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2023-03-30 23:17:53,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753265069] [2023-03-30 23:17:53,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:53,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:17:53,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:53,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:17:53,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:17:53,758 INFO L87 Difference]: Start difference. First operand 2769 states and 3663 transitions. Second operand has 5 states, 5 states have (on average 36.2) internal successors, (181), 4 states have internal predecessors, (181), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:17:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:54,729 INFO L93 Difference]: Finished difference Result 7478 states and 10281 transitions. [2023-03-30 23:17:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:17:54,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 4 states have internal predecessors, (181), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 283 [2023-03-30 23:17:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:54,755 INFO L225 Difference]: With dead ends: 7478 [2023-03-30 23:17:54,755 INFO L226 Difference]: Without dead ends: 4715 [2023-03-30 23:17:54,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 565 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:17:54,765 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 338 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:54,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 124 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 23:17:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2023-03-30 23:17:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4523. [2023-03-30 23:17:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4404 states have (on average 1.225022706630336) internal successors, (5395), 4473 states have internal predecessors, (5395), 25 states have call successors, (25), 25 states have call predecessors, (25), 93 states have return successors, (609), 24 states have call predecessors, (609), 24 states have call successors, (609) [2023-03-30 23:17:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 6029 transitions. [2023-03-30 23:17:54,894 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 6029 transitions. Word has length 283 [2023-03-30 23:17:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:54,895 INFO L495 AbstractCegarLoop]: Abstraction has 4523 states and 6029 transitions. [2023-03-30 23:17:54,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 4 states have internal predecessors, (181), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:17:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 6029 transitions. [2023-03-30 23:17:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-03-30 23:17:54,904 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:54,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:54,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:17:55,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:55,112 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:55,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:55,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1098661306, now seen corresponding path program 1 times [2023-03-30 23:17:55,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:55,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113886072] [2023-03-30 23:17:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:55,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:55,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:55,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:17:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-03-30 23:17:55,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:55,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113886072] [2023-03-30 23:17:55,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113886072] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:55,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:17:55,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:17:55,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031728908] [2023-03-30 23:17:55,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:55,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:17:55,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:55,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:17:55,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:17:55,650 INFO L87 Difference]: Start difference. First operand 4523 states and 6029 transitions. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 4 states have internal predecessors, (183), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:17:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:56,929 INFO L93 Difference]: Finished difference Result 10919 states and 14811 transitions. [2023-03-30 23:17:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:17:56,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 4 states have internal predecessors, (183), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 298 [2023-03-30 23:17:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:56,958 INFO L225 Difference]: With dead ends: 10919 [2023-03-30 23:17:56,958 INFO L226 Difference]: Without dead ends: 6402 [2023-03-30 23:17:56,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:17:56,970 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1207 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:56,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 67 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-30 23:17:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6402 states. [2023-03-30 23:17:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6402 to 6018. [2023-03-30 23:17:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6018 states, 5883 states have (on average 1.1789903110657827) internal successors, (6936), 5952 states have internal predecessors, (6936), 33 states have call successors, (33), 33 states have call predecessors, (33), 101 states have return successors, (661), 32 states have call predecessors, (661), 32 states have call successors, (661) [2023-03-30 23:17:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6018 states to 6018 states and 7630 transitions. [2023-03-30 23:17:57,145 INFO L78 Accepts]: Start accepts. Automaton has 6018 states and 7630 transitions. Word has length 298 [2023-03-30 23:17:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:57,146 INFO L495 AbstractCegarLoop]: Abstraction has 6018 states and 7630 transitions. [2023-03-30 23:17:57,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 4 states have internal predecessors, (183), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:17:57,146 INFO L276 IsEmpty]: Start isEmpty. Operand 6018 states and 7630 transitions. [2023-03-30 23:17:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-03-30 23:17:57,152 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:57,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:57,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-30 23:17:57,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:57,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1055143546, now seen corresponding path program 1 times [2023-03-30 23:17:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:57,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043599628] [2023-03-30 23:17:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:57,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:57,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:57,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:57,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:17:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-03-30 23:17:57,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:57,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043599628] [2023-03-30 23:17:57,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043599628] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:57,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306438762] [2023-03-30 23:17:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:57,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:57,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:57,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:57,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:17:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:57,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:17:57,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 123 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:58,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:17:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:58,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306438762] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:17:58,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:17:58,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 12 [2023-03-30 23:17:58,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934703435] [2023-03-30 23:17:58,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:17:58,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:17:58,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:17:58,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:17:58,441 INFO L87 Difference]: Start difference. First operand 6018 states and 7630 transitions. Second operand has 12 states, 12 states have (on average 48.833333333333336) internal successors, (586), 10 states have internal predecessors, (586), 6 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:18:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:03,261 INFO L93 Difference]: Finished difference Result 20284 states and 26907 transitions. [2023-03-30 23:18:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-03-30 23:18:03,262 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 48.833333333333336) internal successors, (586), 10 states have internal predecessors, (586), 6 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 298 [2023-03-30 23:18:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:03,327 INFO L225 Difference]: With dead ends: 20284 [2023-03-30 23:18:03,328 INFO L226 Difference]: Without dead ends: 14272 [2023-03-30 23:18:03,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 635 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=565, Invalid=2297, Unknown=0, NotChecked=0, Total=2862 [2023-03-30 23:18:03,350 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4016 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4016 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 4480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:03,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4016 Valid, 318 Invalid, 4480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-03-30 23:18:03,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2023-03-30 23:18:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 13336. [2023-03-30 23:18:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13336 states, 13044 states have (on average 1.1590003066544006) internal successors, (15118), 13194 states have internal predecessors, (15118), 71 states have call successors, (71), 71 states have call predecessors, (71), 220 states have return successors, (1659), 70 states have call predecessors, (1659), 70 states have call successors, (1659) [2023-03-30 23:18:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13336 states to 13336 states and 16848 transitions. [2023-03-30 23:18:03,802 INFO L78 Accepts]: Start accepts. Automaton has 13336 states and 16848 transitions. Word has length 298 [2023-03-30 23:18:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:03,803 INFO L495 AbstractCegarLoop]: Abstraction has 13336 states and 16848 transitions. [2023-03-30 23:18:03,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 48.833333333333336) internal successors, (586), 10 states have internal predecessors, (586), 6 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:18:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 13336 states and 16848 transitions. [2023-03-30 23:18:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-03-30 23:18:03,829 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:03,829 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:18:03,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:04,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:04,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:04,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:04,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1524902221, now seen corresponding path program 1 times [2023-03-30 23:18:04,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:04,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549024846] [2023-03-30 23:18:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:04,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:18:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2023-03-30 23:18:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 429 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-03-30 23:18:04,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549024846] [2023-03-30 23:18:04,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549024846] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319660774] [2023-03-30 23:18:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:04,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:04,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:04,679 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:04,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:18:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:18:04,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 431 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-30 23:18:05,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 431 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-30 23:18:05,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319660774] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:05,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:05,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:18:05,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083360808] [2023-03-30 23:18:05,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:05,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:18:05,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:05,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:18:05,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:18:05,463 INFO L87 Difference]: Start difference. First operand 13336 states and 16848 transitions. Second operand has 11 states, 11 states have (on average 54.63636363636363) internal successors, (601), 9 states have internal predecessors, (601), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:18:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:07,303 INFO L93 Difference]: Finished difference Result 30249 states and 38434 transitions. [2023-03-30 23:18:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 23:18:07,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 54.63636363636363) internal successors, (601), 9 states have internal predecessors, (601), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 452 [2023-03-30 23:18:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:07,361 INFO L225 Difference]: With dead ends: 30249 [2023-03-30 23:18:07,361 INFO L226 Difference]: Without dead ends: 17297 [2023-03-30 23:18:07,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 914 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-03-30 23:18:07,390 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1599 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1599 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:07,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1599 Valid, 230 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 23:18:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17297 states. [2023-03-30 23:18:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17297 to 16104. [2023-03-30 23:18:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16104 states, 15731 states have (on average 1.1436653741020915) internal successors, (17991), 15934 states have internal predecessors, (17991), 85 states have call successors, (85), 85 states have call predecessors, (85), 287 states have return successors, (1989), 84 states have call predecessors, (1989), 84 states have call successors, (1989) [2023-03-30 23:18:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16104 states to 16104 states and 20065 transitions. [2023-03-30 23:18:07,782 INFO L78 Accepts]: Start accepts. Automaton has 16104 states and 20065 transitions. Word has length 452 [2023-03-30 23:18:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:07,783 INFO L495 AbstractCegarLoop]: Abstraction has 16104 states and 20065 transitions. [2023-03-30 23:18:07,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.63636363636363) internal successors, (601), 9 states have internal predecessors, (601), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:18:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 16104 states and 20065 transitions. [2023-03-30 23:18:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-03-30 23:18:07,817 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:07,818 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:07,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:08,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:08,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:08,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1776595262, now seen corresponding path program 1 times [2023-03-30 23:18:08,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:08,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585707157] [2023-03-30 23:18:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:08,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:18:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2023-03-30 23:18:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2023-03-30 23:18:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 335 proven. 168 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-03-30 23:18:08,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:08,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585707157] [2023-03-30 23:18:08,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585707157] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:08,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120716959] [2023-03-30 23:18:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:08,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:08,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:08,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:08,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 23:18:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:09,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:18:09,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 530 proven. 4 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2023-03-30 23:18:09,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 263 proven. 519 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-03-30 23:18:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120716959] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:11,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:11,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2023-03-30 23:18:11,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679225510] [2023-03-30 23:18:11,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:11,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 23:18:11,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:11,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 23:18:11,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-03-30 23:18:11,942 INFO L87 Difference]: Start difference. First operand 16104 states and 20065 transitions. Second operand has 18 states, 18 states have (on average 42.388888888888886) internal successors, (763), 16 states have internal predecessors, (763), 7 states have call successors, (14), 9 states have call predecessors, (14), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-03-30 23:18:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:18,832 INFO L93 Difference]: Finished difference Result 51981 states and 65533 transitions. [2023-03-30 23:18:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-03-30 23:18:18,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 42.388888888888886) internal successors, (763), 16 states have internal predecessors, (763), 7 states have call successors, (14), 9 states have call predecessors, (14), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 544 [2023-03-30 23:18:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:18,933 INFO L225 Difference]: With dead ends: 51981 [2023-03-30 23:18:18,933 INFO L226 Difference]: Without dead ends: 33943 [2023-03-30 23:18:18,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1260 GetRequests, 1161 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3465 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1512, Invalid=8388, Unknown=0, NotChecked=0, Total=9900 [2023-03-30 23:18:18,967 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 6236 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 6118 mSolverCounterSat, 1325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6238 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 7443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1325 IncrementalHoareTripleChecker+Valid, 6118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:18,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6238 Valid, 411 Invalid, 7443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1325 Valid, 6118 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-03-30 23:18:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33943 states. [2023-03-30 23:18:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33943 to 32748. [2023-03-30 23:18:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32748 states, 32082 states have (on average 1.1152671279845396) internal successors, (35780), 32404 states have internal predecessors, (35780), 172 states have call successors, (172), 172 states have call predecessors, (172), 493 states have return successors, (3452), 171 states have call predecessors, (3452), 171 states have call successors, (3452) [2023-03-30 23:18:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32748 states to 32748 states and 39404 transitions. [2023-03-30 23:18:19,639 INFO L78 Accepts]: Start accepts. Automaton has 32748 states and 39404 transitions. Word has length 544 [2023-03-30 23:18:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:19,640 INFO L495 AbstractCegarLoop]: Abstraction has 32748 states and 39404 transitions. [2023-03-30 23:18:19,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 42.388888888888886) internal successors, (763), 16 states have internal predecessors, (763), 7 states have call successors, (14), 9 states have call predecessors, (14), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-03-30 23:18:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 32748 states and 39404 transitions. [2023-03-30 23:18:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2023-03-30 23:18:19,710 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:19,711 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:19,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:19,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:19,917 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:19,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:19,918 INFO L85 PathProgramCache]: Analyzing trace with hash -805646283, now seen corresponding path program 1 times [2023-03-30 23:18:19,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:19,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393598988] [2023-03-30 23:18:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:18:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2023-03-30 23:18:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2023-03-30 23:18:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 553 [2023-03-30 23:18:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 668 proven. 2 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2023-03-30 23:18:20,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393598988] [2023-03-30 23:18:20,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393598988] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259799193] [2023-03-30 23:18:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:20,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:20,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:20,957 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:20,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 23:18:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:21,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:18:21,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2023-03-30 23:18:21,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2023-03-30 23:18:21,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259799193] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:21,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:21,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2023-03-30 23:18:21,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391496542] [2023-03-30 23:18:21,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:21,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-30 23:18:21,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-30 23:18:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:18:21,722 INFO L87 Difference]: Start difference. First operand 32748 states and 39404 transitions. Second operand has 10 states, 10 states have (on average 49.7) internal successors, (497), 8 states have internal predecessors, (497), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-30 23:18:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:23,238 INFO L93 Difference]: Finished difference Result 59100 states and 70962 transitions. [2023-03-30 23:18:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-30 23:18:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 49.7) internal successors, (497), 8 states have internal predecessors, (497), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 703 [2023-03-30 23:18:23,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:23,321 INFO L225 Difference]: With dead ends: 59100 [2023-03-30 23:18:23,322 INFO L226 Difference]: Without dead ends: 26736 [2023-03-30 23:18:23,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1433 GetRequests, 1417 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:18:23,365 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 660 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:23,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 137 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-30 23:18:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26736 states. [2023-03-30 23:18:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26736 to 26162. [2023-03-30 23:18:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26162 states, 25639 states have (on average 1.1050352977885254) internal successors, (28332), 25886 states have internal predecessors, (28332), 138 states have call successors, (138), 138 states have call predecessors, (138), 384 states have return successors, (2547), 137 states have call predecessors, (2547), 137 states have call successors, (2547) [2023-03-30 23:18:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26162 states to 26162 states and 31017 transitions. [2023-03-30 23:18:23,972 INFO L78 Accepts]: Start accepts. Automaton has 26162 states and 31017 transitions. Word has length 703 [2023-03-30 23:18:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:23,973 INFO L495 AbstractCegarLoop]: Abstraction has 26162 states and 31017 transitions. [2023-03-30 23:18:23,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.7) internal successors, (497), 8 states have internal predecessors, (497), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-30 23:18:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 26162 states and 31017 transitions. [2023-03-30 23:18:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 719 [2023-03-30 23:18:24,024 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:24,024 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:18:24,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:24,231 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,SelfDestructingSolverStorable10 [2023-03-30 23:18:24,232 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:24,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:24,232 INFO L85 PathProgramCache]: Analyzing trace with hash 174878662, now seen corresponding path program 1 times [2023-03-30 23:18:24,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:24,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485695018] [2023-03-30 23:18:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:24,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat