/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:24:04,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:24:04,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:24:04,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:24:04,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:24:04,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:24:04,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:24:04,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:24:04,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:24:04,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:24:04,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:24:04,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:24:04,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:24:04,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:24:04,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:24:04,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:24:04,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 20:24:04,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:24:04,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:24:04,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:24:04,624 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 20:24:04,641 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:24:04,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:24:04,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:24:04,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:24:04,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:24:04,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:24:04,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:24:04,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:24:04,643 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:24:04,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:24:04,643 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:24:04,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:24:04,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:24:04,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:24:04,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:24:04,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:24:04,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:24:04,644 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:24:04,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:24:04,645 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:24:04,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:24:04,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:24:04,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:24:04,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:24:04,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:24:04,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:24:04,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:24:04,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:24:04,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:24:04,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:24:04,647 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:24:04,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:24:04,647 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:24:04,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:24:04,647 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:24:04,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:24:04,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:24:04,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:24:04,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:24:04,836 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:24:04,836 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:24:04,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label14.c [2023-04-01 20:24:05,950 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:24:06,279 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:24:06,280 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label14.c [2023-04-01 20:24:06,300 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12129d484/632fab3086ab470faa5da83f53872a6c/FLAG6024c893b [2023-04-01 20:24:06,315 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12129d484/632fab3086ab470faa5da83f53872a6c [2023-04-01 20:24:06,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:24:06,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:24:06,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:24:06,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:24:06,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:24:06,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:24:06" (1/1) ... [2023-04-01 20:24:06,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68766101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:06, skipping insertion in model container [2023-04-01 20:24:06,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:24:06" (1/1) ... [2023-04-01 20:24:06,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:24:06,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:24:06,896 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label14.c[57171,57184] [2023-04-01 20:24:06,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:24:06,947 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:24:07,124 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label14.c[57171,57184] [2023-04-01 20:24:07,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:24:07,152 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:24:07,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07 WrapperNode [2023-04-01 20:24:07,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:24:07,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:24:07,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:24:07,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:24:07,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (1/1) ... [2023-04-01 20:24:07,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (1/1) ... [2023-04-01 20:24:07,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (1/1) ... [2023-04-01 20:24:07,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (1/1) ... [2023-04-01 20:24:07,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (1/1) ... [2023-04-01 20:24:07,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (1/1) ... [2023-04-01 20:24:07,290 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (1/1) ... [2023-04-01 20:24:07,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (1/1) ... [2023-04-01 20:24:07,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:24:07,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:24:07,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:24:07,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:24:07,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (1/1) ... [2023-04-01 20:24:07,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:24:07,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:07,342 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 20:24:07,352 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 20:24:07,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:24:07,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:24:07,383 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:24:07,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:24:07,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:24:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:24:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:24:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:24:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:24:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:24:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:24:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:24:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:24:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:24:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:24:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:24:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:24:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:24:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:24:07,490 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:24:07,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:24:08,948 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:24:08,963 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:24:08,963 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:24:08,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:24:08 BoogieIcfgContainer [2023-04-01 20:24:08,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:24:08,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:24:08,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:24:08,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:24:08,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:24:06" (1/3) ... [2023-04-01 20:24:08,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72890ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:24:08, skipping insertion in model container [2023-04-01 20:24:08,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:24:07" (2/3) ... [2023-04-01 20:24:08,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72890ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:24:08, skipping insertion in model container [2023-04-01 20:24:08,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:24:08" (3/3) ... [2023-04-01 20:24:08,978 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label14.c [2023-04-01 20:24:08,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:24:08,995 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:24:09,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:24:09,063 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;@32ae9895, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:24:09,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:24:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:24:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 20:24:09,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:09,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:24:09,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:09,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:09,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1800987514, now seen corresponding path program 1 times [2023-04-01 20:24:09,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:09,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510002616] [2023-04-01 20:24:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:09,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:10,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:10,402 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 20:24:10,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:10,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510002616] [2023-04-01 20:24:10,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510002616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:10,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:24:10,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:24:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863032660] [2023-04-01 20:24:10,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:10,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:24:10,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:10,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:24:10,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:24:10,442 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 43.0) internal successors, (172), 3 states have internal predecessors, (172), 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 20:24:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:13,072 INFO L93 Difference]: Finished difference Result 1104 states and 1964 transitions. [2023-04-01 20:24:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:24:13,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 43.0) internal successors, (172), 3 states have internal predecessors, (172), 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 176 [2023-04-01 20:24:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:13,093 INFO L225 Difference]: With dead ends: 1104 [2023-04-01 20:24:13,094 INFO L226 Difference]: Without dead ends: 696 [2023-04-01 20:24:13,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:24:13,104 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1026 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:13,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 71 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 20:24:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2023-04-01 20:24:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 472. [2023-04-01 20:24:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 462 states have (on average 1.5389610389610389) internal successors, (711), 464 states have internal predecessors, (711), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:24:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 722 transitions. [2023-04-01 20:24:13,230 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 722 transitions. Word has length 176 [2023-04-01 20:24:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:13,234 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 722 transitions. [2023-04-01 20:24:13,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 43.0) internal successors, (172), 3 states have internal predecessors, (172), 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 20:24:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 722 transitions. [2023-04-01 20:24:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-01 20:24:13,248 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:13,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:24:13,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:24:13,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:13,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1737052314, now seen corresponding path program 1 times [2023-04-01 20:24:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37667559] [2023-04-01 20:24:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:13,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:13,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:13,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:24:13,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:13,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37667559] [2023-04-01 20:24:13,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37667559] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:13,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:24:13,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:24:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036770285] [2023-04-01 20:24:13,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:13,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:24:13,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:24:13,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:24:13,997 INFO L87 Difference]: Start difference. First operand 472 states and 722 transitions. Second operand has 7 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 20:24:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:16,090 INFO L93 Difference]: Finished difference Result 1421 states and 2204 transitions. [2023-04-01 20:24:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:24:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 185 [2023-04-01 20:24:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:16,097 INFO L225 Difference]: With dead ends: 1421 [2023-04-01 20:24:16,097 INFO L226 Difference]: Without dead ends: 955 [2023-04-01 20:24:16,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:24:16,107 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 841 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:16,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 137 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 20:24:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2023-04-01 20:24:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 932. [2023-04-01 20:24:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.4616228070175439) internal successors, (1333), 920 states have internal predecessors, (1333), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 20:24:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1364 transitions. [2023-04-01 20:24:16,152 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1364 transitions. Word has length 185 [2023-04-01 20:24:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:16,152 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1364 transitions. [2023-04-01 20:24:16,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 20:24:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1364 transitions. [2023-04-01 20:24:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-01 20:24:16,155 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:16,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:24:16,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:24:16,156 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:16,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash -293644263, now seen corresponding path program 1 times [2023-04-01 20:24:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:16,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928186903] [2023-04-01 20:24:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:16,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:16,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:16,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:24:16,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:16,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928186903] [2023-04-01 20:24:16,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928186903] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:16,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:24:16,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:24:16,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863336254] [2023-04-01 20:24:16,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:16,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:24:16,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:24:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:24:16,720 INFO L87 Difference]: Start difference. First operand 932 states and 1364 transitions. Second operand has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 4 states have internal predecessors, (182), 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 20:24:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:18,827 INFO L93 Difference]: Finished difference Result 2823 states and 4255 transitions. [2023-04-01 20:24:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:24:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 4 states have internal predecessors, (182), 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 188 [2023-04-01 20:24:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:18,837 INFO L225 Difference]: With dead ends: 2823 [2023-04-01 20:24:18,837 INFO L226 Difference]: Without dead ends: 1897 [2023-04-01 20:24:18,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:24:18,845 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 778 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:18,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 131 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 20:24:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2023-04-01 20:24:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1866. [2023-04-01 20:24:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1813 states have (on average 1.4324324324324325) internal successors, (2597), 1846 states have internal predecessors, (2597), 10 states have call successors, (10), 10 states have call predecessors, (10), 42 states have return successors, (116), 9 states have call predecessors, (116), 9 states have call successors, (116) [2023-04-01 20:24:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2723 transitions. [2023-04-01 20:24:18,930 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2723 transitions. Word has length 188 [2023-04-01 20:24:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:18,932 INFO L495 AbstractCegarLoop]: Abstraction has 1866 states and 2723 transitions. [2023-04-01 20:24:18,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 4 states have internal predecessors, (182), 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 20:24:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2723 transitions. [2023-04-01 20:24:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-01 20:24:18,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:18,939 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:24:18,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:24:18,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:18,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1271953909, now seen corresponding path program 1 times [2023-04-01 20:24:18,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:18,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387814839] [2023-04-01 20:24:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:18,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:19,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:24:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:24:20,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387814839] [2023-04-01 20:24:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387814839] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98756142] [2023-04-01 20:24:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:20,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:20,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:20,093 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 20:24:20,111 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 20:24:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:20,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:24:20,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:24:20,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:24:20,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98756142] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:20,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:24:20,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:24:20,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067673083] [2023-04-01 20:24:20,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:20,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:24:20,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:20,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:24:20,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:24:20,501 INFO L87 Difference]: Start difference. First operand 1866 states and 2723 transitions. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 4 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:24:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:20,936 INFO L93 Difference]: Finished difference Result 5656 states and 8535 transitions. [2023-04-01 20:24:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:24:20,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 4 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 199 [2023-04-01 20:24:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:20,958 INFO L225 Difference]: With dead ends: 5656 [2023-04-01 20:24:20,959 INFO L226 Difference]: Without dead ends: 3796 [2023-04-01 20:24:20,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:24:20,970 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 1093 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:20,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 916 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:24:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2023-04-01 20:24:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 3758. [2023-04-01 20:24:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 3631 states have (on average 1.430184522170201) internal successors, (5193), 3722 states have internal predecessors, (5193), 18 states have call successors, (18), 18 states have call predecessors, (18), 108 states have return successors, (369), 17 states have call predecessors, (369), 17 states have call successors, (369) [2023-04-01 20:24:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5580 transitions. [2023-04-01 20:24:21,137 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5580 transitions. Word has length 199 [2023-04-01 20:24:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:21,137 INFO L495 AbstractCegarLoop]: Abstraction has 3758 states and 5580 transitions. [2023-04-01 20:24:21,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 4 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:24:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5580 transitions. [2023-04-01 20:24:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-04-01 20:24:21,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:21,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:24:21,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 20:24:21,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:21,359 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:21,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:21,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1118558104, now seen corresponding path program 1 times [2023-04-01 20:24:21,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:21,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118196648] [2023-04-01 20:24:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:21,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:22,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:22,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:22,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:24:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:24:22,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:22,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118196648] [2023-04-01 20:24:22,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118196648] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:22,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153999582] [2023-04-01 20:24:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:22,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:22,588 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 20:24:22,591 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 20:24:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:22,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:24:22,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 20:24:22,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:24:22,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153999582] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:22,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:24:22,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:24:22,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828110719] [2023-04-01 20:24:22,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:22,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:24:22,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:24:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:24:22,960 INFO L87 Difference]: Start difference. First operand 3758 states and 5580 transitions. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:24:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:23,376 INFO L93 Difference]: Finished difference Result 11384 states and 17505 transitions. [2023-04-01 20:24:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:24:23,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 208 [2023-04-01 20:24:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:23,417 INFO L225 Difference]: With dead ends: 11384 [2023-04-01 20:24:23,417 INFO L226 Difference]: Without dead ends: 7632 [2023-04-01 20:24:23,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:24:23,430 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1107 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:23,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1107 Valid, 943 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:24:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7632 states. [2023-04-01 20:24:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7632 to 7554. [2023-04-01 20:24:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 7279 states have (on average 1.4258826761917847) internal successors, (10379), 7486 states have internal predecessors, (10379), 34 states have call successors, (34), 34 states have call predecessors, (34), 240 states have return successors, (901), 33 states have call predecessors, (901), 33 states have call successors, (901) [2023-04-01 20:24:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 11314 transitions. [2023-04-01 20:24:23,786 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 11314 transitions. Word has length 208 [2023-04-01 20:24:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:23,786 INFO L495 AbstractCegarLoop]: Abstraction has 7554 states and 11314 transitions. [2023-04-01 20:24:23,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:24:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 11314 transitions. [2023-04-01 20:24:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-04-01 20:24:23,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:23,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:24:23,815 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 20:24:24,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:24,011 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:24,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1562386718, now seen corresponding path program 1 times [2023-04-01 20:24:24,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:24,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076353258] [2023-04-01 20:24:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:24,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:24,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:24,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:24,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 20:24:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:24:24,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:24,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076353258] [2023-04-01 20:24:24,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076353258] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:24,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743209079] [2023-04-01 20:24:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:24,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:24,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:24,650 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 20:24:24,653 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 20:24:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:24,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:24:24,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:24:24,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:24:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743209079] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:24,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:24:24,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 20:24:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288193811] [2023-04-01 20:24:24,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:24,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:24:24,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:24:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:24:24,940 INFO L87 Difference]: Start difference. First operand 7554 states and 11314 transitions. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:24:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:26,168 INFO L93 Difference]: Finished difference Result 22506 states and 35564 transitions. [2023-04-01 20:24:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:24:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 212 [2023-04-01 20:24:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:26,250 INFO L225 Difference]: With dead ends: 22506 [2023-04-01 20:24:26,250 INFO L226 Difference]: Without dead ends: 14958 [2023-04-01 20:24:26,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:24:26,277 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 755 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:26,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 137 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 20:24:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14958 states. [2023-04-01 20:24:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14958 to 14814. [2023-04-01 20:24:26,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14814 states, 14157 states have (on average 1.3093875821148548) internal successors, (18537), 14682 states have internal predecessors, (18537), 66 states have call successors, (66), 66 states have call predecessors, (66), 590 states have return successors, (2541), 65 states have call predecessors, (2541), 65 states have call successors, (2541) [2023-04-01 20:24:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14814 states to 14814 states and 21144 transitions. [2023-04-01 20:24:26,836 INFO L78 Accepts]: Start accepts. Automaton has 14814 states and 21144 transitions. Word has length 212 [2023-04-01 20:24:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:26,837 INFO L495 AbstractCegarLoop]: Abstraction has 14814 states and 21144 transitions. [2023-04-01 20:24:26,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:24:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 14814 states and 21144 transitions. [2023-04-01 20:24:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-04-01 20:24:26,864 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:26,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:24:26,873 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 20:24:27,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:27,072 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:27,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash -253344958, now seen corresponding path program 1 times [2023-04-01 20:24:27,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:27,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929117051] [2023-04-01 20:24:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:27,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:27,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:27,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:27,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:24:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:24:27,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:27,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929117051] [2023-04-01 20:24:27,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929117051] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:27,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096430350] [2023-04-01 20:24:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:27,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:27,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:27,737 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 20:24:27,764 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 20:24:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:27,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:24:27,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:24:28,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:24:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:24:28,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096430350] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:24:28,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:24:28,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-04-01 20:24:28,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126048884] [2023-04-01 20:24:28,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:24:28,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:24:28,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:28,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:24:28,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:24:28,148 INFO L87 Difference]: Start difference. First operand 14814 states and 21144 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 6 states have internal predecessors, (222), 3 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:24:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:29,545 INFO L93 Difference]: Finished difference Result 29266 states and 42215 transitions. [2023-04-01 20:24:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:24:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 6 states have internal predecessors, (222), 3 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 214 [2023-04-01 20:24:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:29,601 INFO L225 Difference]: With dead ends: 29266 [2023-04-01 20:24:29,601 INFO L226 Difference]: Without dead ends: 14458 [2023-04-01 20:24:29,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:24:29,631 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1011 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:29,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 44 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 20:24:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14458 states. [2023-04-01 20:24:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14458 to 14454. [2023-04-01 20:24:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14454 states, 13849 states have (on average 1.2717885767925483) internal successors, (17613), 14322 states have internal predecessors, (17613), 66 states have call successors, (66), 66 states have call predecessors, (66), 538 states have return successors, (2269), 65 states have call predecessors, (2269), 65 states have call successors, (2269) [2023-04-01 20:24:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14454 states to 14454 states and 19948 transitions. [2023-04-01 20:24:30,101 INFO L78 Accepts]: Start accepts. Automaton has 14454 states and 19948 transitions. Word has length 214 [2023-04-01 20:24:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:30,101 INFO L495 AbstractCegarLoop]: Abstraction has 14454 states and 19948 transitions. [2023-04-01 20:24:30,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 6 states have internal predecessors, (222), 3 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:24:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 14454 states and 19948 transitions. [2023-04-01 20:24:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-04-01 20:24:30,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:30,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:24:30,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:24:30,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:30,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:30,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1515445078, now seen corresponding path program 1 times [2023-04-01 20:24:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:30,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302817230] [2023-04-01 20:24:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:31,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:31,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:31,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:24:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:24:31,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302817230] [2023-04-01 20:24:31,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302817230] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884498588] [2023-04-01 20:24:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:31,405 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 20:24:31,429 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 20:24:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:31,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:24:31,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:24:31,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:24:31,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884498588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:31,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:24:31,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-04-01 20:24:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949718466] [2023-04-01 20:24:31,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:31,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:24:31,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:24:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:24:31,817 INFO L87 Difference]: Start difference. First operand 14454 states and 19948 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 20:24:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:32,722 INFO L93 Difference]: Finished difference Result 28787 states and 39926 transitions. [2023-04-01 20:24:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:24:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 222 [2023-04-01 20:24:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:32,766 INFO L225 Difference]: With dead ends: 28787 [2023-04-01 20:24:32,766 INFO L226 Difference]: Without dead ends: 14339 [2023-04-01 20:24:32,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:24:32,797 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 82 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:32,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 370 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:24:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14339 states. [2023-04-01 20:24:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14339 to 14323. [2023-04-01 20:24:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14323 states, 13767 states have (on average 1.2241592213263601) internal successors, (16853), 14191 states have internal predecessors, (16853), 66 states have call successors, (66), 66 states have call predecessors, (66), 489 states have return successors, (1921), 65 states have call predecessors, (1921), 65 states have call successors, (1921) [2023-04-01 20:24:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14323 states to 14323 states and 18840 transitions. [2023-04-01 20:24:33,188 INFO L78 Accepts]: Start accepts. Automaton has 14323 states and 18840 transitions. Word has length 222 [2023-04-01 20:24:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:33,188 INFO L495 AbstractCegarLoop]: Abstraction has 14323 states and 18840 transitions. [2023-04-01 20:24:33,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 20:24:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 14323 states and 18840 transitions. [2023-04-01 20:24:33,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-04-01 20:24:33,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:33,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:24:33,223 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 20:24:33,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:33,420 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:33,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash -334900395, now seen corresponding path program 1 times [2023-04-01 20:24:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:33,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999866463] [2023-04-01 20:24:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:33,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:34,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:34,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:34,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:24:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:24:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999866463] [2023-04-01 20:24:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999866463] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927137376] [2023-04-01 20:24:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:34,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:34,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:34,529 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 20:24:34,531 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 20:24:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:34,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:24:34,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:24:34,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:24:34,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927137376] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:24:34,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:24:34,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 20:24:34,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442125173] [2023-04-01 20:24:34,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:24:34,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:24:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:34,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:24:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:24:34,998 INFO L87 Difference]: Start difference. First operand 14323 states and 18840 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 20:24:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:35,876 INFO L93 Difference]: Finished difference Result 38864 states and 51930 transitions. [2023-04-01 20:24:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:24:35,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 274 [2023-04-01 20:24:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:35,942 INFO L225 Difference]: With dead ends: 38864 [2023-04-01 20:24:35,942 INFO L226 Difference]: Without dead ends: 24547 [2023-04-01 20:24:35,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:24:35,970 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 58 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:35,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 357 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:24:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24547 states. [2023-04-01 20:24:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24547 to 24463. [2023-04-01 20:24:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24463 states, 23709 states have (on average 1.2041840651229492) internal successors, (28550), 24235 states have internal predecessors, (28550), 114 states have call successors, (114), 114 states have call predecessors, (114), 639 states have return successors, (3400), 113 states have call predecessors, (3400), 113 states have call successors, (3400) [2023-04-01 20:24:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24463 states to 24463 states and 32064 transitions. [2023-04-01 20:24:36,686 INFO L78 Accepts]: Start accepts. Automaton has 24463 states and 32064 transitions. Word has length 274 [2023-04-01 20:24:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:36,687 INFO L495 AbstractCegarLoop]: Abstraction has 24463 states and 32064 transitions. [2023-04-01 20:24:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 20:24:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 24463 states and 32064 transitions. [2023-04-01 20:24:36,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-04-01 20:24:36,751 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:24:36,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:24:36,763 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 20:24:36,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:36,959 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:24:36,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:24:36,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1955564291, now seen corresponding path program 1 times [2023-04-01 20:24:36,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:24:36,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83671792] [2023-04-01 20:24:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:36,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:24:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:38,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:24:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:38,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:24:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:38,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 20:24:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 128 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:24:38,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:24:38,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83671792] [2023-04-01 20:24:38,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83671792] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:24:38,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169127375] [2023-04-01 20:24:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:24:38,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:24:38,281 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 20:24:38,284 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 20:24:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:24:38,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:24:38,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:24:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 128 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:24:38,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:24:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:24:39,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169127375] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:24:39,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:24:39,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2023-04-01 20:24:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837702911] [2023-04-01 20:24:39,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:24:39,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:24:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:24:39,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:24:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:24:39,122 INFO L87 Difference]: Start difference. First operand 24463 states and 32064 transitions. Second operand has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 10 states have internal predecessors, (776), 5 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:24:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:24:48,808 INFO L93 Difference]: Finished difference Result 75743 states and 111262 transitions. [2023-04-01 20:24:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-04-01 20:24:48,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 10 states have internal predecessors, (776), 5 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 312 [2023-04-01 20:24:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:24:48,809 INFO L225 Difference]: With dead ends: 75743 [2023-04-01 20:24:48,809 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 20:24:48,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1075, Invalid=4931, Unknown=0, NotChecked=0, Total=6006 [2023-04-01 20:24:48,931 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 4324 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 7372 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4326 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 7955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 7372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:24:48,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4326 Valid, 530 Invalid, 7955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 7372 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 20:24:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 20:24:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 20:24:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 20:24:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 20:24:48,933 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 312 [2023-04-01 20:24:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:24:48,933 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 20:24:48,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 10 states have internal predecessors, (776), 5 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:24:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 20:24:48,934 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 20:24:48,936 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 20:24:48,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:24:49,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:24:49,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.