/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/Problem03_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:44:10,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:44:10,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:44:10,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:44:10,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:44:10,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:44:10,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:44:10,481 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 22:44:10,510 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:44:10,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:44:10,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:44:10,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:44:10,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:44:10,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:44:10,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:44:10,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:44:10,513 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:44:10,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:44:10,514 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:44:10,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:44:10,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:44:10,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:44:10,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:44:10,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:44:10,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:44:10,515 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:44:10,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:44:10,515 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:44:10,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:44:10,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:44:10,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:44:10,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:44:10,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:44:10,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:44:10,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:44:10,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:44:10,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:44:10,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:44:10,517 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:44:10,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:44:10,517 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:44:10,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:44:10,517 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:44:10,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:44:10,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:44:10,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:44:10,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:44:10,786 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:44:10,787 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:44:10,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label10.c [2023-03-30 22:44:12,034 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:44:12,385 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:44:12,385 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label10.c [2023-03-30 22:44:12,403 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49e656203/6737cdb53c08484e9239cf739cff9e67/FLAG2d0f17969 [2023-03-30 22:44:12,420 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49e656203/6737cdb53c08484e9239cf739cff9e67 [2023-03-30 22:44:12,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:44:12,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:44:12,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:44:12,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:44:12,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:44:12,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:44:12" (1/1) ... [2023-03-30 22:44:12,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f330bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:12, skipping insertion in model container [2023-03-30 22:44:12,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:44:12" (1/1) ... [2023-03-30 22:44:12,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:44:12,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:44:12,967 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/Problem03_label10.c[58665,58678] [2023-03-30 22:44:13,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:44:13,032 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:44:13,298 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/Problem03_label10.c[58665,58678] [2023-03-30 22:44:13,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:44:13,326 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:44:13,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13 WrapperNode [2023-03-30 22:44:13,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:44:13,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:44:13,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:44:13,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:44:13,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (1/1) ... [2023-03-30 22:44:13,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (1/1) ... [2023-03-30 22:44:13,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (1/1) ... [2023-03-30 22:44:13,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (1/1) ... [2023-03-30 22:44:13,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (1/1) ... [2023-03-30 22:44:13,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (1/1) ... [2023-03-30 22:44:13,465 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (1/1) ... [2023-03-30 22:44:13,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (1/1) ... [2023-03-30 22:44:13,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:44:13,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:44:13,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:44:13,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:44:13,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (1/1) ... [2023-03-30 22:44:13,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:44:13,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:13,518 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 22:44:13,526 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 22:44:13,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:44:13,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:44:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:44:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 22:44:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:44:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 22:44:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:44:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:44:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:44:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:44:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:44:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 22:44:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:44:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:44:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:44:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:44:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:44:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:44:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:44:13,642 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:44:13,644 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:44:15,254 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:44:15,263 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:44:15,264 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 22:44:15,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:44:15 BoogieIcfgContainer [2023-03-30 22:44:15,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:44:15,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:44:15,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:44:15,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:44:15,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:44:12" (1/3) ... [2023-03-30 22:44:15,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5578a3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:44:15, skipping insertion in model container [2023-03-30 22:44:15,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:13" (2/3) ... [2023-03-30 22:44:15,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5578a3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:44:15, skipping insertion in model container [2023-03-30 22:44:15,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:44:15" (3/3) ... [2023-03-30 22:44:15,274 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label10.c [2023-03-30 22:44:15,291 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:44:15,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:44:15,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:44:15,361 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;@7929956a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:44:15,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:44:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 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 22:44:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-03-30 22:44:15,382 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:15,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:15,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:15,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash 654778841, now seen corresponding path program 1 times [2023-03-30 22:44:15,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:15,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82956988] [2023-03-30 22:44:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:15,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:16,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:16,748 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 22:44:16,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:16,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82956988] [2023-03-30 22:44:16,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82956988] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:16,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:16,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:44:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664934133] [2023-03-30 22:44:16,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:16,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:44:16,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:44:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:44:16,800 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 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 61.0) internal successors, (183), 2 states have internal predecessors, (183), 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 22:44:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:18,973 INFO L93 Difference]: Finished difference Result 858 states and 1518 transitions. [2023-03-30 22:44:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:44:18,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 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 187 [2023-03-30 22:44:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:18,999 INFO L225 Difference]: With dead ends: 858 [2023-03-30 22:44:19,000 INFO L226 Difference]: Without dead ends: 483 [2023-03-30 22:44:19,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:44:19,012 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 650 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:19,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 54 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-30 22:44:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-03-30 22:44:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 465. [2023-03-30 22:44:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 455 states have (on average 1.6087912087912088) internal successors, (732), 457 states have internal predecessors, (732), 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 22:44:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 743 transitions. [2023-03-30 22:44:19,110 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 743 transitions. Word has length 187 [2023-03-30 22:44:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:19,113 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 743 transitions. [2023-03-30 22:44:19,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 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 22:44:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 743 transitions. [2023-03-30 22:44:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-03-30 22:44:19,124 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:19,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:19,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:44:19,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:19,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:19,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1951339923, now seen corresponding path program 1 times [2023-03-30 22:44:19,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:19,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488526297] [2023-03-30 22:44:19,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:19,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:19,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:19,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:19,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:19,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488526297] [2023-03-30 22:44:19,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488526297] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:19,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:19,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:44:19,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905902040] [2023-03-30 22:44:19,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:19,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:44:19,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:44:19,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:44:19,891 INFO L87 Difference]: Start difference. First operand 465 states and 743 transitions. Second operand has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 4 states have internal predecessors, (190), 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 22:44:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:21,785 INFO L93 Difference]: Finished difference Result 1396 states and 2264 transitions. [2023-03-30 22:44:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:44:21,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 4 states have internal predecessors, (190), 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 196 [2023-03-30 22:44:21,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:21,798 INFO L225 Difference]: With dead ends: 1396 [2023-03-30 22:44:21,798 INFO L226 Difference]: Without dead ends: 937 [2023-03-30 22:44:21,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:44:21,801 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1304 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:21,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 122 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 22:44:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2023-03-30 22:44:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 916. [2023-03-30 22:44:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 896 states have (on average 1.5212053571428572) internal successors, (1363), 904 states have internal predecessors, (1363), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-03-30 22:44:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1394 transitions. [2023-03-30 22:44:21,848 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1394 transitions. Word has length 196 [2023-03-30 22:44:21,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:21,848 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1394 transitions. [2023-03-30 22:44:21,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 4 states have internal predecessors, (190), 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 22:44:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1394 transitions. [2023-03-30 22:44:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-03-30 22:44:21,852 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:21,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:21,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:44:21,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:21,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1945424131, now seen corresponding path program 1 times [2023-03-30 22:44:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:21,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660401746] [2023-03-30 22:44:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:21,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:22,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:22,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:22,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:22,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660401746] [2023-03-30 22:44:22,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660401746] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:22,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:22,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:44:22,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624034173] [2023-03-30 22:44:22,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:22,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:44:22,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:22,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:44:22,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:44:22,488 INFO L87 Difference]: Start difference. First operand 916 states and 1394 transitions. Second operand has 7 states, 6 states have (on average 33.0) internal successors, (198), 4 states have internal predecessors, (198), 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 22:44:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:23,551 INFO L93 Difference]: Finished difference Result 1801 states and 2774 transitions. [2023-03-30 22:44:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:44:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 33.0) internal successors, (198), 4 states have internal predecessors, (198), 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 204 [2023-03-30 22:44:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:23,556 INFO L225 Difference]: With dead ends: 1801 [2023-03-30 22:44:23,556 INFO L226 Difference]: Without dead ends: 891 [2023-03-30 22:44:23,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:44:23,559 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 903 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:23,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 43 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:44:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2023-03-30 22:44:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2023-03-30 22:44:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 867 states have (on average 1.467128027681661) internal successors, (1272), 875 states have internal predecessors, (1272), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-03-30 22:44:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1303 transitions. [2023-03-30 22:44:23,604 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1303 transitions. Word has length 204 [2023-03-30 22:44:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:23,604 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1303 transitions. [2023-03-30 22:44:23,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 33.0) internal successors, (198), 4 states have internal predecessors, (198), 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 22:44:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1303 transitions. [2023-03-30 22:44:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-03-30 22:44:23,608 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:23,608 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:23,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:44:23,610 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:23,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:23,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1751189265, now seen corresponding path program 1 times [2023-03-30 22:44:23,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:23,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85126947] [2023-03-30 22:44:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:23,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-30 22:44:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:44:24,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:24,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85126947] [2023-03-30 22:44:24,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85126947] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:24,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494320679] [2023-03-30 22:44:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:24,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:24,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:24,262 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 22:44:24,270 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 22:44:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:44:24,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:44:24,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494320679] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:24,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:24,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:44:24,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981423052] [2023-03-30 22:44:24,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:24,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:44:24,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:44:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:44:24,758 INFO L87 Difference]: Start difference. First operand 887 states and 1303 transitions. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 4 states have internal predecessors, (196), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:44:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:25,698 INFO L93 Difference]: Finished difference Result 2692 states and 4112 transitions. [2023-03-30 22:44:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:44:25,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 4 states have internal predecessors, (196), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 209 [2023-03-30 22:44:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:25,709 INFO L225 Difference]: With dead ends: 2692 [2023-03-30 22:44:25,709 INFO L226 Difference]: Without dead ends: 1811 [2023-03-30 22:44:25,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:25,713 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 742 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:25,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 106 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:44:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2023-03-30 22:44:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1771. [2023-03-30 22:44:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1726 states have (on average 1.399188876013905) internal successors, (2415), 1751 states have internal predecessors, (2415), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (113), 9 states have call predecessors, (113), 9 states have call successors, (113) [2023-03-30 22:44:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2538 transitions. [2023-03-30 22:44:25,805 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2538 transitions. Word has length 209 [2023-03-30 22:44:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:25,805 INFO L495 AbstractCegarLoop]: Abstraction has 1771 states and 2538 transitions. [2023-03-30 22:44:25,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 4 states have internal predecessors, (196), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:44:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2538 transitions. [2023-03-30 22:44:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-03-30 22:44:25,814 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:25,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:25,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:44:26,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:26,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:26,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash -491394392, now seen corresponding path program 1 times [2023-03-30 22:44:26,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:26,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97096895] [2023-03-30 22:44:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:26,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:26,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:27,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:27,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:44:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:44:27,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97096895] [2023-03-30 22:44:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97096895] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665076161] [2023-03-30 22:44:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:27,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:27,165 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 22:44:27,199 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 22:44:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:27,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:44:27,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:44:27,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:27,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665076161] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:27,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:27,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:44:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093462050] [2023-03-30 22:44:27,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:27,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:44:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:44:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:44:27,585 INFO L87 Difference]: Start difference. First operand 1771 states and 2538 transitions. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:44:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:27,972 INFO L93 Difference]: Finished difference Result 5361 states and 7957 transitions. [2023-03-30 22:44:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:44:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 210 [2023-03-30 22:44:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:27,991 INFO L225 Difference]: With dead ends: 5361 [2023-03-30 22:44:27,991 INFO L226 Difference]: Without dead ends: 3596 [2023-03-30 22:44:27,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:27,997 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 976 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:27,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 820 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:44:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2023-03-30 22:44:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3558. [2023-03-30 22:44:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3452 states have (on average 1.3974507531865585) internal successors, (4824), 3522 states have internal predecessors, (4824), 18 states have call successors, (18), 18 states have call predecessors, (18), 87 states have return successors, (353), 17 states have call predecessors, (353), 17 states have call successors, (353) [2023-03-30 22:44:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5195 transitions. [2023-03-30 22:44:28,125 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5195 transitions. Word has length 210 [2023-03-30 22:44:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:28,125 INFO L495 AbstractCegarLoop]: Abstraction has 3558 states and 5195 transitions. [2023-03-30 22:44:28,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:44:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5195 transitions. [2023-03-30 22:44:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-03-30 22:44:28,135 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:28,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:28,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 22:44:28,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:28,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:28,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1321133013, now seen corresponding path program 1 times [2023-03-30 22:44:28,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:28,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857165222] [2023-03-30 22:44:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:28,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:29,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:29,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:29,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:44:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:44:29,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:29,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857165222] [2023-03-30 22:44:29,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857165222] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:29,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621007737] [2023-03-30 22:44:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:29,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:29,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:29,409 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 22:44:29,412 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 22:44:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:29,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:44:29,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-30 22:44:29,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:29,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621007737] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:29,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:29,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:44:29,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359845600] [2023-03-30 22:44:29,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:29,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:44:29,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:29,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:44:29,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:44:29,798 INFO L87 Difference]: Start difference. First operand 3558 states and 5195 transitions. Second operand has 5 states, 5 states have (on average 40.4) internal successors, (202), 4 states have internal predecessors, (202), 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 22:44:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:30,256 INFO L93 Difference]: Finished difference Result 10792 states and 16326 transitions. [2023-03-30 22:44:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:44:30,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 4 states have internal predecessors, (202), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 219 [2023-03-30 22:44:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:30,301 INFO L225 Difference]: With dead ends: 10792 [2023-03-30 22:44:30,301 INFO L226 Difference]: Without dead ends: 7240 [2023-03-30 22:44:30,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:30,315 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 988 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:30,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 834 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:44:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7240 states. [2023-03-30 22:44:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7240 to 7162. [2023-03-30 22:44:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 6925 states have (on average 1.3927797833935018) internal successors, (9645), 7094 states have internal predecessors, (9645), 34 states have call successors, (34), 34 states have call predecessors, (34), 202 states have return successors, (865), 33 states have call predecessors, (865), 33 states have call successors, (865) [2023-03-30 22:44:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 10544 transitions. [2023-03-30 22:44:30,611 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 10544 transitions. Word has length 219 [2023-03-30 22:44:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:30,612 INFO L495 AbstractCegarLoop]: Abstraction has 7162 states and 10544 transitions. [2023-03-30 22:44:30,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 4 states have internal predecessors, (202), 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 22:44:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 10544 transitions. [2023-03-30 22:44:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-03-30 22:44:30,631 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:30,631 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:30,642 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 22:44:30,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:30,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:30,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1988400293, now seen corresponding path program 1 times [2023-03-30 22:44:30,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:30,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709018172] [2023-03-30 22:44:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:31,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:31,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:31,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:44:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:44:31,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:31,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709018172] [2023-03-30 22:44:31,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709018172] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:31,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435598841] [2023-03-30 22:44:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:31,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:31,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:31,377 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 22:44:31,402 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 22:44:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:31,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:44:31,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:31,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:44:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:31,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435598841] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:44:31,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:44:31,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 22:44:31,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600945516] [2023-03-30 22:44:31,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:44:31,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:44:31,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:44:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:44:31,782 INFO L87 Difference]: Start difference. First operand 7162 states and 10544 transitions. Second operand has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 10 states have internal predecessors, (230), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 22:44:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:40,953 INFO L93 Difference]: Finished difference Result 31312 states and 59962 transitions. [2023-03-30 22:44:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-03-30 22:44:40,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 10 states have internal predecessors, (230), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 219 [2023-03-30 22:44:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:41,134 INFO L225 Difference]: With dead ends: 31312 [2023-03-30 22:44:41,135 INFO L226 Difference]: Without dead ends: 24148 [2023-03-30 22:44:41,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 480 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=592, Invalid=3068, Unknown=0, NotChecked=0, Total=3660 [2023-03-30 22:44:41,187 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 2814 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 7431 mSolverCounterSat, 1136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2835 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 8567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1136 IncrementalHoareTripleChecker+Valid, 7431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:41,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2835 Valid, 424 Invalid, 8567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1136 Valid, 7431 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-03-30 22:44:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24148 states. [2023-03-30 22:44:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24148 to 22840. [2023-03-30 22:44:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22840 states, 22083 states have (on average 1.2092107050672463) internal successors, (26703), 22612 states have internal predecessors, (26703), 122 states have call successors, (122), 106 states have call predecessors, (122), 634 states have return successors, (3472), 121 states have call predecessors, (3472), 121 states have call successors, (3472) [2023-03-30 22:44:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22840 states to 22840 states and 30297 transitions. [2023-03-30 22:44:42,344 INFO L78 Accepts]: Start accepts. Automaton has 22840 states and 30297 transitions. Word has length 219 [2023-03-30 22:44:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:42,344 INFO L495 AbstractCegarLoop]: Abstraction has 22840 states and 30297 transitions. [2023-03-30 22:44:42,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 10 states have internal predecessors, (230), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 22:44:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 22840 states and 30297 transitions. [2023-03-30 22:44:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-03-30 22:44:42,392 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:42,392 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:42,399 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 22:44:42,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:42,600 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:42,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1552061052, now seen corresponding path program 1 times [2023-03-30 22:44:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:42,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729790000] [2023-03-30 22:44:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:42,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:43,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:43,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:43,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:44:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:43,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:44:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-03-30 22:44:43,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:43,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729790000] [2023-03-30 22:44:43,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729790000] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:43,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215015517] [2023-03-30 22:44:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:43,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:43,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:43,272 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 22:44:43,275 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 22:44:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:43,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:44:43,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-03-30 22:44:43,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215015517] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:43,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:43,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-30 22:44:43,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807617956] [2023-03-30 22:44:43,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:44:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:43,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:44:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:43,594 INFO L87 Difference]: Start difference. First operand 22840 states and 30297 transitions. Second operand has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:44:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:45,042 INFO L93 Difference]: Finished difference Result 56492 states and 76533 transitions. [2023-03-30 22:44:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:44:45,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 231 [2023-03-30 22:44:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:45,158 INFO L225 Difference]: With dead ends: 56492 [2023-03-30 22:44:45,159 INFO L226 Difference]: Without dead ends: 33710 [2023-03-30 22:44:45,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:44:45,201 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 655 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:45,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 94 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:44:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33710 states. [2023-03-30 22:44:46,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33710 to 33536. [2023-03-30 22:44:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33536 states, 32505 states have (on average 1.1686202122750347) internal successors, (37986), 33209 states have internal predecessors, (37986), 171 states have call successors, (171), 156 states have call predecessors, (171), 859 states have return successors, (4359), 170 states have call predecessors, (4359), 170 states have call successors, (4359) [2023-03-30 22:44:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33536 states to 33536 states and 42516 transitions. [2023-03-30 22:44:46,256 INFO L78 Accepts]: Start accepts. Automaton has 33536 states and 42516 transitions. Word has length 231 [2023-03-30 22:44:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:46,256 INFO L495 AbstractCegarLoop]: Abstraction has 33536 states and 42516 transitions. [2023-03-30 22:44:46,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:44:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 33536 states and 42516 transitions. [2023-03-30 22:44:46,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-03-30 22:44:46,293 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:46,293 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:46,304 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 22:44:46,501 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 22:44:46,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:46,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -685751639, now seen corresponding path program 1 times [2023-03-30 22:44:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:46,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129569331] [2023-03-30 22:44:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:47,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:47,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:47,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:44:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:44:47,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:47,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129569331] [2023-03-30 22:44:47,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129569331] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:47,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500382720] [2023-03-30 22:44:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:47,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:47,725 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 22:44:47,748 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 22:44:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:47,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:44:47,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:44:48,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:48,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500382720] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:48,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:48,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-03-30 22:44:48,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626132805] [2023-03-30 22:44:48,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:44:48,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:48,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:44:48,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:48,176 INFO L87 Difference]: Start difference. First operand 33536 states and 42516 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 22:44:49,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:49,643 INFO L93 Difference]: Finished difference Result 93514 states and 120275 transitions. [2023-03-30 22:44:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:44:49,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 233 [2023-03-30 22:44:49,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:49,878 INFO L225 Difference]: With dead ends: 93514 [2023-03-30 22:44:49,878 INFO L226 Difference]: Without dead ends: 59988 [2023-03-30 22:44:49,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:49,945 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 48 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:49,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 366 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:44:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59988 states. [2023-03-30 22:44:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59988 to 59920. [2023-03-30 22:44:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59920 states, 58494 states have (on average 1.1570417478715767) internal successors, (67680), 59333 states have internal predecessors, (67680), 305 states have call successors, (305), 282 states have call predecessors, (305), 1120 states have return successors, (7866), 304 states have call predecessors, (7866), 304 states have call successors, (7866) [2023-03-30 22:44:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59920 states to 59920 states and 75851 transitions. [2023-03-30 22:44:51,998 INFO L78 Accepts]: Start accepts. Automaton has 59920 states and 75851 transitions. Word has length 233 [2023-03-30 22:44:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:51,999 INFO L495 AbstractCegarLoop]: Abstraction has 59920 states and 75851 transitions. [2023-03-30 22:44:51,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 22:44:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 59920 states and 75851 transitions. [2023-03-30 22:44:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-03-30 22:44:52,046 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:52,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:52,059 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 22:44:52,257 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 22:44:52,258 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:52,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash -177953092, now seen corresponding path program 1 times [2023-03-30 22:44:52,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:52,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12143808] [2023-03-30 22:44:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:52,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:53,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:53,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:53,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:53,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12143808] [2023-03-30 22:44:53,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12143808] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:53,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:53,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:44:53,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072585992] [2023-03-30 22:44:53,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:53,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:44:53,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:44:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:44:53,485 INFO L87 Difference]: Start difference. First operand 59920 states and 75851 transitions. Second operand has 7 states, 6 states have (on average 37.666666666666664) internal successors, (226), 4 states have internal predecessors, (226), 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 22:44:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:56,089 INFO L93 Difference]: Finished difference Result 106957 states and 135154 transitions. [2023-03-30 22:44:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:44:56,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 37.666666666666664) internal successors, (226), 4 states have internal predecessors, (226), 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 232 [2023-03-30 22:44:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:56,297 INFO L225 Difference]: With dead ends: 106957 [2023-03-30 22:44:56,298 INFO L226 Difference]: Without dead ends: 70283 [2023-03-30 22:44:56,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:56,352 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1002 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:56,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 88 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-30 22:44:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70283 states.