/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/Problem17_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:18:44,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:18:44,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:18:44,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:18:44,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:18:44,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:18:44,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:18:44,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:18:44,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:18:44,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:18:44,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:18:44,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:18:44,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:18:44,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:18:44,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:18:44,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:18:44,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:18:44,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:18:44,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:18:44,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:18:44,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:18:44,646 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:18:44,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:18:44,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:18:44,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:18:44,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:18:44,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:18:44,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:18:44,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:18:44,647 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:18:44,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:18:44,647 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:18:44,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:18:44,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:18:44,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:18:44,649 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:18:44,650 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:18:44,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:18:44,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:18:44,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:18:44,860 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:18:44,860 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:18:44,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2023-04-01 23:18:45,886 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:18:46,186 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:18:46,186 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2023-04-01 23:18:46,205 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcd398de9/1753a52ddbc042d98ee825494594fc2b/FLAG847fc3e0b [2023-04-01 23:18:46,215 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcd398de9/1753a52ddbc042d98ee825494594fc2b [2023-04-01 23:18:46,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:18:46,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:18:46,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:18:46,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:18:46,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:18:46,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:18:46" (1/1) ... [2023-04-01 23:18:46,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a85d4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:46, skipping insertion in model container [2023-04-01 23:18:46,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:18:46" (1/1) ... [2023-04-01 23:18:46,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:18:46,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:18:46,420 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/Problem17_label03.c[7281,7294] [2023-04-01 23:18:46,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:18:46,779 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:18:46,804 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/Problem17_label03.c[7281,7294] [2023-04-01 23:18:47,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:18:47,029 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:18:47,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47 WrapperNode [2023-04-01 23:18:47,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:18:47,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:18:47,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:18:47,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:18:47,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (1/1) ... [2023-04-01 23:18:47,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (1/1) ... [2023-04-01 23:18:47,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (1/1) ... [2023-04-01 23:18:47,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (1/1) ... [2023-04-01 23:18:47,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (1/1) ... [2023-04-01 23:18:47,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (1/1) ... [2023-04-01 23:18:47,194 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (1/1) ... [2023-04-01 23:18:47,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (1/1) ... [2023-04-01 23:18:47,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:18:47,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:18:47,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:18:47,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:18:47,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (1/1) ... [2023-04-01 23:18:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:18:47,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:18:47,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:18:47,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:18:47,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:18:47,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:18:47,278 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:18:47,278 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:18:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:18:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:18:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:18:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:18:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:18:47,351 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:18:47,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:18:49,756 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:18:49,767 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:18:49,767 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:18:49,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:18:49 BoogieIcfgContainer [2023-04-01 23:18:49,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:18:49,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:18:49,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:18:49,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:18:49,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:18:46" (1/3) ... [2023-04-01 23:18:49,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c92d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:18:49, skipping insertion in model container [2023-04-01 23:18:49,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:47" (2/3) ... [2023-04-01 23:18:49,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c92d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:18:49, skipping insertion in model container [2023-04-01 23:18:49,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:18:49" (3/3) ... [2023-04-01 23:18:49,777 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label03.c [2023-04-01 23:18:49,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:18:49,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:18:49,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:18:49,834 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;@3a03f061, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:18:49,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:18:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:18:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 23:18:49,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:49,846 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] [2023-04-01 23:18:49,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:49,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash -695106350, now seen corresponding path program 1 times [2023-04-01 23:18:49,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:49,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573968551] [2023-04-01 23:18:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:49,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:50,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:50,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:50,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573968551] [2023-04-01 23:18:50,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573968551] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:18:50,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:18:50,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:18:50,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225892954] [2023-04-01 23:18:50,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:18:50,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:18:50,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:50,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:18:50,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:18:50,228 INFO L87 Difference]: Start difference. First operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:18:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:18:53,719 INFO L93 Difference]: Finished difference Result 1692 states and 3091 transitions. [2023-04-01 23:18:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:18:53,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 55 [2023-04-01 23:18:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:18:53,733 INFO L225 Difference]: With dead ends: 1692 [2023-04-01 23:18:53,733 INFO L226 Difference]: Without dead ends: 1012 [2023-04-01 23:18:53,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:18:53,743 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1449 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:18:53,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1449 Valid, 135 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 23:18:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-04-01 23:18:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1002. [2023-04-01 23:18:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 986 states have (on average 1.5446247464503042) internal successors, (1523), 988 states have internal predecessors, (1523), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 23:18:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1542 transitions. [2023-04-01 23:18:53,809 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1542 transitions. Word has length 55 [2023-04-01 23:18:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:18:53,809 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1542 transitions. [2023-04-01 23:18:53,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:18:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1542 transitions. [2023-04-01 23:18:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 23:18:53,813 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:53,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:18:53,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:18:53,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:53,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:53,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1931867657, now seen corresponding path program 1 times [2023-04-01 23:18:53,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:53,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463447972] [2023-04-01 23:18:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:53,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:53,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:53,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:18:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:54,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:54,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463447972] [2023-04-01 23:18:54,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463447972] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:18:54,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:18:54,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:18:54,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075415329] [2023-04-01 23:18:54,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:18:54,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:18:54,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:54,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:18:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:18:54,076 INFO L87 Difference]: Start difference. First operand 1002 states and 1542 transitions. Second operand has 7 states, 6 states have (on average 20.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:18:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:18:57,731 INFO L93 Difference]: Finished difference Result 2962 states and 4571 transitions. [2023-04-01 23:18:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:18:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.0) internal successors, (120), 4 states have internal predecessors, (120), 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 126 [2023-04-01 23:18:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:18:57,738 INFO L225 Difference]: With dead ends: 2962 [2023-04-01 23:18:57,739 INFO L226 Difference]: Without dead ends: 1966 [2023-04-01 23:18:57,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:18:57,747 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1610 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 3480 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 4245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 3480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:18:57,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 332 Invalid, 4245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 3480 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 23:18:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2023-04-01 23:18:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1914. [2023-04-01 23:18:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1880 states have (on average 1.2920212765957446) internal successors, (2429), 1888 states have internal predecessors, (2429), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (43), 15 states have call predecessors, (43), 9 states have call successors, (43) [2023-04-01 23:18:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2482 transitions. [2023-04-01 23:18:57,802 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2482 transitions. Word has length 126 [2023-04-01 23:18:57,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:18:57,804 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 2482 transitions. [2023-04-01 23:18:57,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:18:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2482 transitions. [2023-04-01 23:18:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-01 23:18:57,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:57,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:18:57,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:18:57,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:57,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1772035365, now seen corresponding path program 1 times [2023-04-01 23:18:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:57,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503684576] [2023-04-01 23:18:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:57,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:58,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:58,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:18:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:58,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503684576] [2023-04-01 23:18:58,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503684576] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:18:58,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535579090] [2023-04-01 23:18:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:58,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:18:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:18:58,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:18:58,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:18:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:58,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 23:18:58,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:18:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:58,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:18:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535579090] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:18:58,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:18:58,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 6] total 9 [2023-04-01 23:18:58,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135511851] [2023-04-01 23:18:58,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:18:58,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:18:58,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:18:58,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:18:58,713 INFO L87 Difference]: Start difference. First operand 1914 states and 2482 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:19:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:19:00,533 INFO L93 Difference]: Finished difference Result 4721 states and 6277 transitions. [2023-04-01 23:19:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:19:00,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 129 [2023-04-01 23:19:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:19:00,543 INFO L225 Difference]: With dead ends: 4721 [2023-04-01 23:19:00,543 INFO L226 Difference]: Without dead ends: 2367 [2023-04-01 23:19:00,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:19:00,548 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 462 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:19:00,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 905 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 23:19:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2023-04-01 23:19:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2357. [2023-04-01 23:19:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2317 states have (on average 1.218817436340095) internal successors, (2824), 2326 states have internal predecessors, (2824), 12 states have call successors, (12), 12 states have call predecessors, (12), 27 states have return successors, (64), 18 states have call predecessors, (64), 11 states have call successors, (64) [2023-04-01 23:19:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 2900 transitions. [2023-04-01 23:19:00,597 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 2900 transitions. Word has length 129 [2023-04-01 23:19:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:19:00,598 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 2900 transitions. [2023-04-01 23:19:00,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:19:00,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 2900 transitions. [2023-04-01 23:19:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-04-01 23:19:00,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:19:00,604 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:19:00,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 23:19:00,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:00,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:19:00,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:19:00,809 INFO L85 PathProgramCache]: Analyzing trace with hash 772435990, now seen corresponding path program 1 times [2023-04-01 23:19:00,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:19:00,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608008783] [2023-04-01 23:19:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:00,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:19:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:19:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:01,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:19:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:01,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:19:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:19:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:19:01,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608008783] [2023-04-01 23:19:01,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608008783] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:19:01,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324547772] [2023-04-01 23:19:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:01,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:01,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:19:01,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:19:01,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:19:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:01,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:19:01,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:19:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:19:01,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:19:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:19:01,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324547772] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:19:01,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:19:01,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:19:01,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635840427] [2023-04-01 23:19:01,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:19:01,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:19:01,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:19:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:19:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:19:01,494 INFO L87 Difference]: Start difference. First operand 2357 states and 2900 transitions. Second operand has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 9 states have internal predecessors, (349), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 23:19:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:19:04,978 INFO L93 Difference]: Finished difference Result 6083 states and 7753 transitions. [2023-04-01 23:19:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 23:19:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 9 states have internal predecessors, (349), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 215 [2023-04-01 23:19:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:19:04,992 INFO L225 Difference]: With dead ends: 6083 [2023-04-01 23:19:04,993 INFO L226 Difference]: Without dead ends: 3732 [2023-04-01 23:19:04,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 432 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 23:19:04,999 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 5218 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 3658 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5218 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 4795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 3658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:19:05,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5218 Valid, 305 Invalid, 4795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 3658 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 23:19:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2023-04-01 23:19:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3719. [2023-04-01 23:19:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3643 states have (on average 1.1970903101839143) internal successors, (4361), 3664 states have internal predecessors, (4361), 18 states have call successors, (18), 18 states have call predecessors, (18), 57 states have return successors, (172), 36 states have call predecessors, (172), 17 states have call successors, (172) [2023-04-01 23:19:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 4551 transitions. [2023-04-01 23:19:05,074 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 4551 transitions. Word has length 215 [2023-04-01 23:19:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:19:05,076 INFO L495 AbstractCegarLoop]: Abstraction has 3719 states and 4551 transitions. [2023-04-01 23:19:05,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 9 states have internal predecessors, (349), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 23:19:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 4551 transitions. [2023-04-01 23:19:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 23:19:05,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:19:05,078 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:19:05,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:19:05,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 23:19:05,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:19:05,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:19:05,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1256843418, now seen corresponding path program 1 times [2023-04-01 23:19:05,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:19:05,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088792377] [2023-04-01 23:19:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:05,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:19:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:05,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:19:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:05,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:19:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:05,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:19:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 23:19:05,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:19:05,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088792377] [2023-04-01 23:19:05,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088792377] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:19:05,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663020040] [2023-04-01 23:19:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:05,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:05,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:19:05,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:19:05,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:19:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:05,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:19:05,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:19:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 23:19:05,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:19:05,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663020040] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:19:05,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:19:05,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:19:05,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144214120] [2023-04-01 23:19:05,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:19:05,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:19:05,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:19:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:19:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:19:05,724 INFO L87 Difference]: Start difference. First operand 3719 states and 4551 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:19:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:19:07,222 INFO L93 Difference]: Finished difference Result 10507 states and 13033 transitions. [2023-04-01 23:19:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:19:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 217 [2023-04-01 23:19:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:19:07,241 INFO L225 Difference]: With dead ends: 10507 [2023-04-01 23:19:07,242 INFO L226 Difference]: Without dead ends: 6793 [2023-04-01 23:19:07,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:19:07,249 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 408 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:19:07,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 461 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 23:19:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6793 states. [2023-04-01 23:19:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6793 to 5927. [2023-04-01 23:19:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5927 states, 5811 states have (on average 1.152641541903287) internal successors, (6698), 5843 states have internal predecessors, (6698), 28 states have call successors, (28), 28 states have call predecessors, (28), 87 states have return successors, (367), 55 states have call predecessors, (367), 27 states have call successors, (367) [2023-04-01 23:19:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 7093 transitions. [2023-04-01 23:19:07,379 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 7093 transitions. Word has length 217 [2023-04-01 23:19:07,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:19:07,379 INFO L495 AbstractCegarLoop]: Abstraction has 5927 states and 7093 transitions. [2023-04-01 23:19:07,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:19:07,380 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 7093 transitions. [2023-04-01 23:19:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-04-01 23:19:07,382 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:19:07,382 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:19:07,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:19:07,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:07,588 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:19:07,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:19:07,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2017577664, now seen corresponding path program 1 times [2023-04-01 23:19:07,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:19:07,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584227813] [2023-04-01 23:19:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:07,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:19:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:07,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:19:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:07,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:19:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:07,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:19:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:07,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 23:19:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 285 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 23:19:07,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:19:07,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584227813] [2023-04-01 23:19:07,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584227813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:19:07,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949510279] [2023-04-01 23:19:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:07,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:07,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:19:07,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:19:07,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:19:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:08,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:19:08,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:19:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 23:19:08,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:19:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 23:19:08,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949510279] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:19:08,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:19:08,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2023-04-01 23:19:08,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681621977] [2023-04-01 23:19:08,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:19:08,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 23:19:08,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:19:08,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 23:19:08,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:19:08,698 INFO L87 Difference]: Start difference. First operand 5927 states and 7093 transitions. Second operand has 10 states, 10 states have (on average 34.5) internal successors, (345), 8 states have internal predecessors, (345), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:19:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:19:13,049 INFO L93 Difference]: Finished difference Result 16520 states and 20399 transitions. [2023-04-01 23:19:13,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 23:19:13,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 34.5) internal successors, (345), 8 states have internal predecessors, (345), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 299 [2023-04-01 23:19:13,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:19:13,082 INFO L225 Difference]: With dead ends: 16520 [2023-04-01 23:19:13,082 INFO L226 Difference]: Without dead ends: 9702 [2023-04-01 23:19:13,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 609 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:19:13,096 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2579 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 4354 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2583 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 5240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 4354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:19:13,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2583 Valid, 329 Invalid, 5240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 4354 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 23:19:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9702 states. [2023-04-01 23:19:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9702 to 8336. [2023-04-01 23:19:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8336 states, 8101 states have (on average 1.1767683002098506) internal successors, (9533), 8192 states have internal predecessors, (9533), 38 states have call successors, (38), 38 states have call predecessors, (38), 196 states have return successors, (859), 105 states have call predecessors, (859), 37 states have call successors, (859) [2023-04-01 23:19:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8336 states to 8336 states and 10430 transitions. [2023-04-01 23:19:13,343 INFO L78 Accepts]: Start accepts. Automaton has 8336 states and 10430 transitions. Word has length 299 [2023-04-01 23:19:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:19:13,343 INFO L495 AbstractCegarLoop]: Abstraction has 8336 states and 10430 transitions. [2023-04-01 23:19:13,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.5) internal successors, (345), 8 states have internal predecessors, (345), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:19:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 8336 states and 10430 transitions. [2023-04-01 23:19:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-04-01 23:19:13,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:19:13,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:19:13,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 23:19:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:13,552 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:19:13,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:19:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1578055488, now seen corresponding path program 1 times [2023-04-01 23:19:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:19:13,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901219136] [2023-04-01 23:19:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:13,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:19:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:13,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:19:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:13,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:19:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:13,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:19:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:13,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 23:19:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 23:19:13,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:19:13,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901219136] [2023-04-01 23:19:13,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901219136] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:19:13,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727933360] [2023-04-01 23:19:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:13,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:13,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:19:13,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:19:13,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:19:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:14,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:19:14,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:19:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 297 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 23:19:14,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:19:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 297 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 23:19:14,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727933360] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:19:14,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:19:14,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2023-04-01 23:19:14,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47612317] [2023-04-01 23:19:14,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:19:14,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 23:19:14,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:19:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 23:19:14,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:19:14,329 INFO L87 Difference]: Start difference. First operand 8336 states and 10430 transitions. Second operand has 10 states, 10 states have (on average 36.0) internal successors, (360), 8 states have internal predecessors, (360), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:19:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:19:18,489 INFO L93 Difference]: Finished difference Result 25241 states and 33197 transitions. [2023-04-01 23:19:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 23:19:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 36.0) internal successors, (360), 8 states have internal predecessors, (360), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 304 [2023-04-01 23:19:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:19:18,537 INFO L225 Difference]: With dead ends: 25241 [2023-04-01 23:19:18,537 INFO L226 Difference]: Without dead ends: 16031 [2023-04-01 23:19:18,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 621 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:19:18,551 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2456 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 4230 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2461 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 4970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 4230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:19:18,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2461 Valid, 291 Invalid, 4970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 4230 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 23:19:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16031 states. [2023-04-01 23:19:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16031 to 14153. [2023-04-01 23:19:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14153 states, 13769 states have (on average 1.1150410342072772) internal successors, (15353), 13934 states have internal predecessors, (15353), 64 states have call successors, (64), 64 states have call predecessors, (64), 319 states have return successors, (1585), 154 states have call predecessors, (1585), 63 states have call successors, (1585) [2023-04-01 23:19:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14153 states to 14153 states and 17002 transitions. [2023-04-01 23:19:18,799 INFO L78 Accepts]: Start accepts. Automaton has 14153 states and 17002 transitions. Word has length 304 [2023-04-01 23:19:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:19:18,799 INFO L495 AbstractCegarLoop]: Abstraction has 14153 states and 17002 transitions. [2023-04-01 23:19:18,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.0) internal successors, (360), 8 states have internal predecessors, (360), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:19:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 14153 states and 17002 transitions. [2023-04-01 23:19:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-04-01 23:19:18,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:19:18,805 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:19:18,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:19:19,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:19,011 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:19:19,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:19:19,012 INFO L85 PathProgramCache]: Analyzing trace with hash -223945788, now seen corresponding path program 1 times [2023-04-01 23:19:19,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:19:19,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74545207] [2023-04-01 23:19:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:19:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:19,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:19:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:19:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:19,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:19:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:19,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-04-01 23:19:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 205 proven. 101 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-01 23:19:19,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:19:19,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74545207] [2023-04-01 23:19:19,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74545207] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:19:19,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622888453] [2023-04-01 23:19:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:19,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:19,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:19:19,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:19:19,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:19:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:19,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 23:19:19,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:19:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 23:19:20,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:19:21,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622888453] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:19:21,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:19:21,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-01 23:19:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870854176] [2023-04-01 23:19:21,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:19:21,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 23:19:21,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:19:21,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 23:19:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-04-01 23:19:21,783 INFO L87 Difference]: Start difference. First operand 14153 states and 17002 transitions. Second operand has 16 states, 16 states have (on average 32.0) internal successors, (512), 14 states have internal predecessors, (512), 7 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 23:19:33,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:37,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:39,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:41,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:44,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:47,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:50,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:52,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:55,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:57,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:00,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:02,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:04,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:05,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:08,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:11,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:13,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:16,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:20,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:22,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:25,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:27,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:31,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:33,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:36,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:38,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:40,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:43,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:45,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:48,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:50,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:52,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:55,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:58,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:00,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:03,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:05,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:21:05,579 INFO L93 Difference]: Finished difference Result 71075 states and 88051 transitions. [2023-04-01 23:21:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2023-04-01 23:21:05,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 32.0) internal successors, (512), 14 states have internal predecessors, (512), 7 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 322 [2023-04-01 23:21:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:21:05,709 INFO L225 Difference]: With dead ends: 71075 [2023-04-01 23:21:05,709 INFO L226 Difference]: Without dead ends: 52937 [2023-04-01 23:21:05,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 588 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10527 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3750, Invalid=22656, Unknown=0, NotChecked=0, Total=26406 [2023-04-01 23:21:05,738 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 15853 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 16879 mSolverCounterSat, 3338 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15853 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 20253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3338 IncrementalHoareTripleChecker+Valid, 16879 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:21:05,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15853 Valid, 1258 Invalid, 20253 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3338 Valid, 16879 Invalid, 36 Unknown, 0 Unchecked, 95.7s Time] [2023-04-01 23:21:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52937 states. [2023-04-01 23:21:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52937 to 42889. [2023-04-01 23:21:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42889 states, 42026 states have (on average 1.1024365868747918) internal successors, (46331), 42351 states have internal predecessors, (46331), 194 states have call successors, (194), 194 states have call predecessors, (194), 668 states have return successors, (5348), 343 states have call predecessors, (5348), 193 states have call successors, (5348) [2023-04-01 23:21:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42889 states to 42889 states and 51873 transitions. [2023-04-01 23:21:06,670 INFO L78 Accepts]: Start accepts. Automaton has 42889 states and 51873 transitions. Word has length 322 [2023-04-01 23:21:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:21:06,671 INFO L495 AbstractCegarLoop]: Abstraction has 42889 states and 51873 transitions. [2023-04-01 23:21:06,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 32.0) internal successors, (512), 14 states have internal predecessors, (512), 7 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 23:21:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 42889 states and 51873 transitions. [2023-04-01 23:21:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-04-01 23:21:06,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:21:06,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:21:06,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 23:21:06,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:06,876 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:21:06,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:21:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash 180502037, now seen corresponding path program 1 times [2023-04-01 23:21:06,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:21:06,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423725034] [2023-04-01 23:21:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:06,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:21:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:07,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:21:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:07,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:21:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:07,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:21:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:21:07,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:21:07,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423725034] [2023-04-01 23:21:07,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423725034] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:21:07,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141899829] [2023-04-01 23:21:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:07,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:07,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:21:07,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:21:07,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:21:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:07,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:21:07,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:21:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:21:07,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:21:07,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141899829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:21:07,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:21:07,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:21:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589130075] [2023-04-01 23:21:07,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:21:07,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:21:07,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:21:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:21:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:21:07,357 INFO L87 Difference]: Start difference. First operand 42889 states and 51873 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:21:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:21:09,591 INFO L93 Difference]: Finished difference Result 108450 states and 132290 transitions. [2023-04-01 23:21:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:21:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 350 [2023-04-01 23:21:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:21:09,935 INFO L225 Difference]: With dead ends: 108450 [2023-04-01 23:21:09,936 INFO L226 Difference]: Without dead ends: 65071 [2023-04-01 23:21:09,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 355 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:21:09,969 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 441 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:21:09,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 758 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 23:21:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65071 states. [2023-04-01 23:21:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65071 to 62446. [2023-04-01 23:21:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62446 states, 61369 states have (on average 1.0872101549642328) internal successors, (66721), 61715 states have internal predecessors, (66721), 284 states have call successors, (284), 284 states have call predecessors, (284), 792 states have return successors, (7675), 446 states have call predecessors, (7675), 283 states have call successors, (7675) [2023-04-01 23:21:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62446 states to 62446 states and 74680 transitions. [2023-04-01 23:21:10,993 INFO L78 Accepts]: Start accepts. Automaton has 62446 states and 74680 transitions. Word has length 350 [2023-04-01 23:21:10,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:21:10,993 INFO L495 AbstractCegarLoop]: Abstraction has 62446 states and 74680 transitions. [2023-04-01 23:21:10,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:21:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 62446 states and 74680 transitions. [2023-04-01 23:21:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2023-04-01 23:21:11,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:21:11,000 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:21:11,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 23:21:11,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:11,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:21:11,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:21:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash -747063525, now seen corresponding path program 1 times [2023-04-01 23:21:11,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:21:11,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575793695] [2023-04-01 23:21:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:21:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:11,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:21:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:11,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:21:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:11,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:21:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:11,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:21:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 147 proven. 3 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 23:21:11,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:21:11,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575793695] [2023-04-01 23:21:11,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575793695] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:21:11,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074267488] [2023-04-01 23:21:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:11,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:11,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:21:11,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:21:11,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:21:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:12,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:21:12,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:21:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 23:21:12,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:21:12,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074267488] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:21:12,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:21:12,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:21:12,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043757438] [2023-04-01 23:21:12,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:21:12,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:21:12,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:21:12,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:21:12,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:21:12,197 INFO L87 Difference]: Start difference. First operand 62446 states and 74680 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:21:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:21:14,380 INFO L93 Difference]: Finished difference Result 142917 states and 172152 transitions. [2023-04-01 23:21:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:21:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 414 [2023-04-01 23:21:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:21:14,590 INFO L225 Difference]: With dead ends: 142917 [2023-04-01 23:21:14,590 INFO L226 Difference]: Without dead ends: 80017 [2023-04-01 23:21:14,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:21:14,661 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 461 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:21:14,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 255 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 23:21:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80017 states. [2023-04-01 23:21:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80017 to 77814. [2023-04-01 23:21:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77814 states, 76522 states have (on average 1.0910718486186979) internal successors, (83491), 76926 states have internal predecessors, (83491), 354 states have call successors, (354), 354 states have call predecessors, (354), 937 states have return successors, (10341), 533 states have call predecessors, (10341), 353 states have call successors, (10341) [2023-04-01 23:21:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77814 states to 77814 states and 94186 transitions. [2023-04-01 23:21:16,237 INFO L78 Accepts]: Start accepts. Automaton has 77814 states and 94186 transitions. Word has length 414 [2023-04-01 23:21:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:21:16,238 INFO L495 AbstractCegarLoop]: Abstraction has 77814 states and 94186 transitions. [2023-04-01 23:21:16,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:21:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 77814 states and 94186 transitions. [2023-04-01 23:21:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-04-01 23:21:16,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:21:16,250 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:21:16,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 23:21:16,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 23:21:16,456 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:21:16,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:21:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1395828068, now seen corresponding path program 1 times [2023-04-01 23:21:16,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:21:16,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386864492] [2023-04-01 23:21:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:16,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:21:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:17,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:21:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:17,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:21:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:17,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:21:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:17,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:21:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:17,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2023-04-01 23:21:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 433 proven. 102 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-04-01 23:21:17,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:21:17,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386864492] [2023-04-01 23:21:17,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386864492] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:21:17,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365522787] [2023-04-01 23:21:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:17,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:17,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:21:17,608 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:21:17,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:21:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:17,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 23:21:17,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:21:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 529 proven. 75 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:21:18,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:21:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 409 proven. 2 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2023-04-01 23:21:18,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365522787] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:21:18,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:21:18,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 19 [2023-04-01 23:21:18,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031817980] [2023-04-01 23:21:18,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:21:18,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 23:21:18,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:21:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 23:21:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-04-01 23:21:18,500 INFO L87 Difference]: Start difference. First operand 77814 states and 94186 transitions. Second operand has 19 states, 19 states have (on average 32.421052631578945) internal successors, (616), 17 states have internal predecessors, (616), 8 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:21:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:21:42,700 INFO L93 Difference]: Finished difference Result 214849 states and 261709 transitions. [2023-04-01 23:21:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-01 23:21:42,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 32.421052631578945) internal successors, (616), 17 states have internal predecessors, (616), 8 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 474 [2023-04-01 23:21:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:21:43,177 INFO L225 Difference]: With dead ends: 214849 [2023-04-01 23:21:43,177 INFO L226 Difference]: Without dead ends: 133467 [2023-04-01 23:21:43,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1320 GetRequests, 1112 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19162 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6133, Invalid=37757, Unknown=0, NotChecked=0, Total=43890 [2023-04-01 23:21:43,238 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 24983 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 20233 mSolverCounterSat, 5251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24983 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 25484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5251 IncrementalHoareTripleChecker+Valid, 20233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:21:43,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24983 Valid, 1342 Invalid, 25484 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5251 Valid, 20233 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2023-04-01 23:21:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133467 states. [2023-04-01 23:21:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133467 to 125547. [2023-04-01 23:21:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125547 states, 123619 states have (on average 1.073791245682298) internal successors, (132741), 124171 states have internal predecessors, (132741), 572 states have call successors, (572), 572 states have call predecessors, (572), 1355 states have return successors, (14132), 803 states have call predecessors, (14132), 571 states have call successors, (14132) [2023-04-01 23:21:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125547 states to 125547 states and 147445 transitions. [2023-04-01 23:21:45,161 INFO L78 Accepts]: Start accepts. Automaton has 125547 states and 147445 transitions. Word has length 474 [2023-04-01 23:21:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:21:45,161 INFO L495 AbstractCegarLoop]: Abstraction has 125547 states and 147445 transitions. [2023-04-01 23:21:45,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 32.421052631578945) internal successors, (616), 17 states have internal predecessors, (616), 8 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:21:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 125547 states and 147445 transitions. [2023-04-01 23:21:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-04-01 23:21:45,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:21:45,173 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:21:45,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 23:21:45,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:45,378 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:21:45,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:21:45,379 INFO L85 PathProgramCache]: Analyzing trace with hash 346823387, now seen corresponding path program 1 times [2023-04-01 23:21:45,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:21:45,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907310493] [2023-04-01 23:21:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:45,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:21:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:21:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:45,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:21:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:45,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:21:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:45,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2023-04-01 23:21:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 147 proven. 3 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-04-01 23:21:46,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:21:46,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907310493] [2023-04-01 23:21:46,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907310493] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:21:46,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081933130] [2023-04-01 23:21:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:46,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:46,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:21:46,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:21:46,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:21:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:46,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:21:46,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:21:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-04-01 23:21:46,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:21:46,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081933130] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:21:46,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:21:46,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:21:46,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188735717] [2023-04-01 23:21:46,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:21:46,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:21:46,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:21:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:21:46,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:21:46,371 INFO L87 Difference]: Start difference. First operand 125547 states and 147445 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:21:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:21:48,877 INFO L93 Difference]: Finished difference Result 251073 states and 294875 transitions. [2023-04-01 23:21:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:21:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 487 [2023-04-01 23:21:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:21:49,290 INFO L225 Difference]: With dead ends: 251073 [2023-04-01 23:21:49,290 INFO L226 Difference]: Without dead ends: 125532 [2023-04-01 23:21:49,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:21:49,390 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 435 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:21:49,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 717 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 23:21:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125532 states. [2023-04-01 23:21:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125532 to 125097. [2023-04-01 23:21:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125097 states, 123180 states have (on average 1.0602045786653678) internal successors, (130596), 123728 states have internal predecessors, (130596), 570 states have call successors, (570), 570 states have call predecessors, (570), 1346 states have return successors, (11559), 798 states have call predecessors, (11559), 569 states have call successors, (11559) [2023-04-01 23:21:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125097 states to 125097 states and 142725 transitions. [2023-04-01 23:21:51,508 INFO L78 Accepts]: Start accepts. Automaton has 125097 states and 142725 transitions. Word has length 487 [2023-04-01 23:21:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:21:51,509 INFO L495 AbstractCegarLoop]: Abstraction has 125097 states and 142725 transitions. [2023-04-01 23:21:51,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:21:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 125097 states and 142725 transitions. [2023-04-01 23:21:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2023-04-01 23:21:51,524 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:21:51,525 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:21:51,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:21:51,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 23:21:51,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:21:51,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:21:51,731 INFO L85 PathProgramCache]: Analyzing trace with hash 28513665, now seen corresponding path program 1 times [2023-04-01 23:21:51,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:21:51,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302621012] [2023-04-01 23:21:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:51,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:21:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:52,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:21:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:52,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:21:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:52,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:21:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:52,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2023-04-01 23:21:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:52,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 403 [2023-04-01 23:21:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 386 proven. 75 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2023-04-01 23:21:52,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:21:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302621012] [2023-04-01 23:21:52,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302621012] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:21:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752524014] [2023-04-01 23:21:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:52,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:52,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:21:52,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:21:52,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:21:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:52,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 23:21:52,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:21:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 434 proven. 86 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 23:21:53,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:21:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 204 proven. 406 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:21:53,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752524014] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:21:53,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:21:53,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-04-01 23:21:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343206881] [2023-04-01 23:21:53,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:21:53,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 23:21:53,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:21:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 23:21:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-01 23:21:53,909 INFO L87 Difference]: Start difference. First operand 125097 states and 142725 transitions. Second operand has 19 states, 19 states have (on average 52.578947368421055) internal successors, (999), 17 states have internal predecessors, (999), 7 states have call successors, (14), 10 states have call predecessors, (14), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 23:22:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:22:09,669 INFO L93 Difference]: Finished difference Result 291925 states and 333669 transitions. [2023-04-01 23:22:09,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-04-01 23:22:09,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 52.578947368421055) internal successors, (999), 17 states have internal predecessors, (999), 7 states have call successors, (14), 10 states have call predecessors, (14), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 526 [2023-04-01 23:22:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:22:10,056 INFO L225 Difference]: With dead ends: 291925 [2023-04-01 23:22:10,057 INFO L226 Difference]: Without dead ends: 166834 [2023-04-01 23:22:10,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1219 GetRequests, 1122 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3253 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1442, Invalid=8260, Unknown=0, NotChecked=0, Total=9702 [2023-04-01 23:22:10,275 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 18855 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 12389 mSolverCounterSat, 3028 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18855 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 15417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3028 IncrementalHoareTripleChecker+Valid, 12389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:22:10,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18855 Valid, 851 Invalid, 15417 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3028 Valid, 12389 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2023-04-01 23:22:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166834 states. [2023-04-01 23:22:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166834 to 156763. [2023-04-01 23:22:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156763 states, 154363 states have (on average 1.04764095022771) internal successors, (161717), 155024 states have internal predecessors, (161717), 714 states have call successors, (714), 714 states have call predecessors, (714), 1685 states have return successors, (11661), 1024 states have call predecessors, (11661), 713 states have call successors, (11661) [2023-04-01 23:22:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156763 states to 156763 states and 174092 transitions. [2023-04-01 23:22:12,628 INFO L78 Accepts]: Start accepts. Automaton has 156763 states and 174092 transitions. Word has length 526 [2023-04-01 23:22:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:22:12,629 INFO L495 AbstractCegarLoop]: Abstraction has 156763 states and 174092 transitions. [2023-04-01 23:22:12,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 52.578947368421055) internal successors, (999), 17 states have internal predecessors, (999), 7 states have call successors, (14), 10 states have call predecessors, (14), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 23:22:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 156763 states and 174092 transitions. [2023-04-01 23:22:12,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2023-04-01 23:22:12,831 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:22:12,831 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:22:12,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:22:13,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:22:13,037 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:22:13,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:22:13,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1042621333, now seen corresponding path program 1 times [2023-04-01 23:22:13,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:22:13,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595874784] [2023-04-01 23:22:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:22:13,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:22:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:22:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:22:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:22:13,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:22:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:22:13,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:22:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:22:13,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 23:22:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:22:13,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2023-04-01 23:22:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:22:14,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 453 [2023-04-01 23:22:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:22:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 654 proven. 109 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2023-04-01 23:22:14,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:22:14,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595874784] [2023-04-01 23:22:14,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595874784] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:22:14,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650314356] [2023-04-01 23:22:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:22:14,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:22:14,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:22:14,122 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:22:14,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:22:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:22:14,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 23:22:14,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:22:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 506 proven. 47 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2023-04-01 23:22:26,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:22:26,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650314356] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:22:26,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:22:26,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-04-01 23:22:26,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236907000] [2023-04-01 23:22:26,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:22:26,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 23:22:26,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:22:26,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 23:22:26,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=225, Unknown=3, NotChecked=0, Total=306 [2023-04-01 23:22:26,770 INFO L87 Difference]: Start difference. First operand 156763 states and 174092 transitions. Second operand has 17 states, 17 states have (on average 30.470588235294116) internal successors, (518), 15 states have internal predecessors, (518), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 23:22:32,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:22:45,181 WARN L223 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)