/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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:17:06,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:17:06,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:17:06,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:17:06,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:17:06,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:17:06,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:17:06,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:17:06,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:17:06,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:17:06,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:17:06,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:17:06,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:17:06,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:17:06,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:17:06,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:17:06,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:17:06,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:17:06,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:17:06,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:17:06,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:17:06,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:17:06,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:17:06,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:17:06,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:17:06,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:17:06,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:17:06,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:17:06,324 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 [2023-04-02 06:17:06,355 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:17:06,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:17:06,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:17:06,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:17:06,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:17:06,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:17:06,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:17:06,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:17:06,358 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:17:06,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:17:06,359 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:17:06,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:17:06,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:17:06,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:17:06,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:17:06,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:17:06,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:17:06,360 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:17:06,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:17:06,360 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:17:06,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:17:06,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:17:06,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:17:06,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:17:06,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:17:06,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:17:06,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:17:06,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:17:06,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:17:06,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:17:06,361 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:17:06,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:17:06,362 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:17:06,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:17:06,362 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:17:06,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:17:06,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:17:06,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:17:06,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:17:06,605 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:17:06,607 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:17:06,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-02 06:17:07,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:17:07,990 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:17:07,990 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-02 06:17:08,002 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8de1df20d/45f5cb707ae6424d989829afd02d6847/FLAG094ca90fa [2023-04-02 06:17:08,014 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8de1df20d/45f5cb707ae6424d989829afd02d6847 [2023-04-02 06:17:08,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:17:08,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:17:08,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:17:08,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:17:08,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:17:08,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2895baa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08, skipping insertion in model container [2023-04-02 06:17:08,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:17:08,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:17:08,252 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6320,6333] [2023-04-02 06:17:08,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:17:08,305 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:17:08,341 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/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6320,6333] [2023-04-02 06:17:08,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:17:08,377 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:17:08,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08 WrapperNode [2023-04-02 06:17:08,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:17:08,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:17:08,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:17:08,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:17:08,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,450 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:17:08,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:17:08,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:17:08,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:17:08,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (1/1) ... [2023-04-02 06:17:08,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:17:08,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:17:08,526 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) [2023-04-02 06:17:08,547 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 [2023-04-02 06:17:08,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:17:08,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:17:08,566 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:17:08,566 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:17:08,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:17:08,566 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:17:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:17:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:17:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:17:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:17:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:17:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:17:08,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:17:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:17:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:17:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:17:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:17:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:17:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:17:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:17:08,733 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:17:08,735 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:17:09,286 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:17:09,305 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:17:09,305 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:17:09,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:17:09 BoogieIcfgContainer [2023-04-02 06:17:09,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:17:09,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:17:09,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:17:09,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:17:09,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:17:08" (1/3) ... [2023-04-02 06:17:09,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b780166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:17:09, skipping insertion in model container [2023-04-02 06:17:09,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:08" (2/3) ... [2023-04-02 06:17:09,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b780166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:17:09, skipping insertion in model container [2023-04-02 06:17:09,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:17:09" (3/3) ... [2023-04-02 06:17:09,314 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-02 06:17:09,328 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:17:09,328 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:17:09,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:17:09,380 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;@5329520a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:17:09,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:17:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 135 states have (on average 1.6962962962962962) internal successors, (229), 136 states have internal predecessors, (229), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:17:09,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 06:17:09,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:09,395 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] [2023-04-02 06:17:09,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:09,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash 506507691, now seen corresponding path program 1 times [2023-04-02 06:17:09,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:09,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716329316] [2023-04-02 06:17:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:09,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:10,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:10,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:10,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716329316] [2023-04-02 06:17:10,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716329316] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:10,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:10,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:10,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817249408] [2023-04-02 06:17:10,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:10,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:10,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:10,150 INFO L87 Difference]: Start difference. First operand has 141 states, 135 states have (on average 1.6962962962962962) internal successors, (229), 136 states have internal predecessors, (229), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:11,131 INFO L93 Difference]: Finished difference Result 329 states and 529 transitions. [2023-04-02 06:17:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:11,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-04-02 06:17:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:11,143 INFO L225 Difference]: With dead ends: 329 [2023-04-02 06:17:11,143 INFO L226 Difference]: Without dead ends: 219 [2023-04-02 06:17:11,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:17:11,149 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 178 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:11,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 514 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 06:17:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-04-02 06:17:11,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2023-04-02 06:17:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 213 states have (on average 1.5023474178403755) internal successors, (320), 213 states have internal predecessors, (320), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 323 transitions. [2023-04-02 06:17:11,210 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 323 transitions. Word has length 64 [2023-04-02 06:17:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:11,210 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 323 transitions. [2023-04-02 06:17:11,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 323 transitions. [2023-04-02 06:17:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:17:11,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:11,213 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] [2023-04-02 06:17:11,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:17:11,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:11,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:11,214 INFO L85 PathProgramCache]: Analyzing trace with hash 230116457, now seen corresponding path program 1 times [2023-04-02 06:17:11,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:11,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823158836] [2023-04-02 06:17:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:11,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:11,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:11,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:11,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823158836] [2023-04-02 06:17:11,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823158836] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:11,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:11,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:11,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438064011] [2023-04-02 06:17:11,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:11,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:11,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:11,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:11,476 INFO L87 Difference]: Start difference. First operand 217 states and 323 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:12,194 INFO L93 Difference]: Finished difference Result 541 states and 839 transitions. [2023-04-02 06:17:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:12,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-02 06:17:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:12,198 INFO L225 Difference]: With dead ends: 541 [2023-04-02 06:17:12,198 INFO L226 Difference]: Without dead ends: 363 [2023-04-02 06:17:12,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:17:12,201 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 142 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:12,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 447 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:17:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-04-02 06:17:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2023-04-02 06:17:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.5378151260504203) internal successors, (549), 357 states have internal predecessors, (549), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 552 transitions. [2023-04-02 06:17:12,236 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 552 transitions. Word has length 65 [2023-04-02 06:17:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:12,237 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 552 transitions. [2023-04-02 06:17:12,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 552 transitions. [2023-04-02 06:17:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:17:12,239 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:12,239 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] [2023-04-02 06:17:12,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:17:12,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:12,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1930026134, now seen corresponding path program 1 times [2023-04-02 06:17:12,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:12,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223503666] [2023-04-02 06:17:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:12,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:12,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:12,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:12,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223503666] [2023-04-02 06:17:12,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223503666] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:12,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:12,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:12,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692532912] [2023-04-02 06:17:12,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:12,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:12,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:12,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:12,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:12,463 INFO L87 Difference]: Start difference. First operand 361 states and 552 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:13,110 INFO L93 Difference]: Finished difference Result 941 states and 1474 transitions. [2023-04-02 06:17:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-02 06:17:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:13,114 INFO L225 Difference]: With dead ends: 941 [2023-04-02 06:17:13,114 INFO L226 Difference]: Without dead ends: 619 [2023-04-02 06:17:13,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:17:13,117 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 137 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:13,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 432 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:17:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-04-02 06:17:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2023-04-02 06:17:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 613 states have (on average 1.5546492659053834) internal successors, (953), 613 states have internal predecessors, (953), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:13,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 956 transitions. [2023-04-02 06:17:13,178 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 956 transitions. Word has length 66 [2023-04-02 06:17:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:13,179 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 956 transitions. [2023-04-02 06:17:13,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:13,179 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 956 transitions. [2023-04-02 06:17:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:17:13,180 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:13,180 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] [2023-04-02 06:17:13,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:17:13,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:13,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1783426718, now seen corresponding path program 1 times [2023-04-02 06:17:13,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:13,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240596425] [2023-04-02 06:17:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:13,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:13,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240596425] [2023-04-02 06:17:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240596425] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:13,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:13,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:13,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512191612] [2023-04-02 06:17:13,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:13,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:13,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:13,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:13,381 INFO L87 Difference]: Start difference. First operand 617 states and 956 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:14,045 INFO L93 Difference]: Finished difference Result 1645 states and 2582 transitions. [2023-04-02 06:17:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:17:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:14,051 INFO L225 Difference]: With dead ends: 1645 [2023-04-02 06:17:14,051 INFO L226 Difference]: Without dead ends: 1067 [2023-04-02 06:17:14,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:17:14,062 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 132 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:14,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 417 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:17:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2023-04-02 06:17:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1065. [2023-04-02 06:17:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1061 states have (on average 1.5579641847313854) internal successors, (1653), 1061 states have internal predecessors, (1653), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1656 transitions. [2023-04-02 06:17:14,150 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1656 transitions. Word has length 67 [2023-04-02 06:17:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:14,150 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1656 transitions. [2023-04-02 06:17:14,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1656 transitions. [2023-04-02 06:17:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:17:14,153 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:14,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:17:14,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:17:14,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:14,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash 913132949, now seen corresponding path program 1 times [2023-04-02 06:17:14,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:14,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476009831] [2023-04-02 06:17:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:14,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:14,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:14,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:14,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476009831] [2023-04-02 06:17:14,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476009831] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:14,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:14,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:14,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436557163] [2023-04-02 06:17:14,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:14,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:14,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:14,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:14,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:14,407 INFO L87 Difference]: Start difference. First operand 1065 states and 1656 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:15,124 INFO L93 Difference]: Finished difference Result 2861 states and 4474 transitions. [2023-04-02 06:17:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:15,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:17:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:15,133 INFO L225 Difference]: With dead ends: 2861 [2023-04-02 06:17:15,133 INFO L226 Difference]: Without dead ends: 1835 [2023-04-02 06:17:15,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:17:15,138 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 127 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:15,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 402 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:17:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2023-04-02 06:17:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1833. [2023-04-02 06:17:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1829 states have (on average 1.5511208310552214) internal successors, (2837), 1829 states have internal predecessors, (2837), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2840 transitions. [2023-04-02 06:17:15,283 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2840 transitions. Word has length 68 [2023-04-02 06:17:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:15,283 INFO L495 AbstractCegarLoop]: Abstraction has 1833 states and 2840 transitions. [2023-04-02 06:17:15,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2840 transitions. [2023-04-02 06:17:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-02 06:17:15,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:15,286 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] [2023-04-02 06:17:15,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:17:15,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:15,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1105798425, now seen corresponding path program 1 times [2023-04-02 06:17:15,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:15,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250015282] [2023-04-02 06:17:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:15,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:15,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:15,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250015282] [2023-04-02 06:17:15,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250015282] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:15,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:15,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:17:15,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715059133] [2023-04-02 06:17:15,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:17:15,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:17:15,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:17:15,619 INFO L87 Difference]: Start difference. First operand 1833 states and 2840 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:17,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:17,121 INFO L93 Difference]: Finished difference Result 12597 states and 19646 transitions. [2023-04-02 06:17:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:17:17,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-02 06:17:17,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:17,168 INFO L225 Difference]: With dead ends: 12597 [2023-04-02 06:17:17,168 INFO L226 Difference]: Without dead ends: 10803 [2023-04-02 06:17:17,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:17:17,176 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1572 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:17,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 2051 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:17:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10803 states. [2023-04-02 06:17:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10803 to 3625. [2023-04-02 06:17:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3621 states have (on average 1.5390776028721347) internal successors, (5573), 3621 states have internal predecessors, (5573), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 5576 transitions. [2023-04-02 06:17:17,743 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 5576 transitions. Word has length 69 [2023-04-02 06:17:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:17,744 INFO L495 AbstractCegarLoop]: Abstraction has 3625 states and 5576 transitions. [2023-04-02 06:17:17,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 5576 transitions. [2023-04-02 06:17:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:17:17,745 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:17,745 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] [2023-04-02 06:17:17,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:17:17,745 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:17,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 61454482, now seen corresponding path program 1 times [2023-04-02 06:17:17,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:17,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690930867] [2023-04-02 06:17:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:17,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:18,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:18,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:18,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690930867] [2023-04-02 06:17:18,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690930867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:18,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:18,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:17:18,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588542724] [2023-04-02 06:17:18,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:18,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:17:18,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:17:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:17:18,110 INFO L87 Difference]: Start difference. First operand 3625 states and 5576 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:20,772 INFO L93 Difference]: Finished difference Result 18835 states and 28781 transitions. [2023-04-02 06:17:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:17:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-02 06:17:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:20,832 INFO L225 Difference]: With dead ends: 18835 [2023-04-02 06:17:20,833 INFO L226 Difference]: Without dead ends: 15249 [2023-04-02 06:17:20,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:17:20,844 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 638 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:20,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 1245 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 06:17:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15249 states. [2023-04-02 06:17:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15249 to 15241. [2023-04-02 06:17:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15241 states, 15237 states have (on average 1.5208374351906544) internal successors, (23173), 15237 states have internal predecessors, (23173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15241 states to 15241 states and 23176 transitions. [2023-04-02 06:17:23,197 INFO L78 Accepts]: Start accepts. Automaton has 15241 states and 23176 transitions. Word has length 70 [2023-04-02 06:17:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:23,197 INFO L495 AbstractCegarLoop]: Abstraction has 15241 states and 23176 transitions. [2023-04-02 06:17:23,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 15241 states and 23176 transitions. [2023-04-02 06:17:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:17:23,203 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:23,203 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] [2023-04-02 06:17:23,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:17:23,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:23,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1540464389, now seen corresponding path program 1 times [2023-04-02 06:17:23,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:23,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585997267] [2023-04-02 06:17:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:23,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:23,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:23,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:23,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585997267] [2023-04-02 06:17:23,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585997267] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:23,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:23,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:17:23,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91083522] [2023-04-02 06:17:23,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:23,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:17:23,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:17:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:17:23,484 INFO L87 Difference]: Start difference. First operand 15241 states and 23176 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:27,411 INFO L93 Difference]: Finished difference Result 42989 states and 65450 transitions. [2023-04-02 06:17:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:17:27,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-02 06:17:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:27,505 INFO L225 Difference]: With dead ends: 42989 [2023-04-02 06:17:27,505 INFO L226 Difference]: Without dead ends: 27787 [2023-04-02 06:17:27,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:17:27,543 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 831 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:27,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 218 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:17:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27787 states. [2023-04-02 06:17:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27787 to 27785. [2023-04-02 06:17:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27785 states, 27781 states have (on average 1.5125805406572836) internal successors, (42021), 27781 states have internal predecessors, (42021), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27785 states to 27785 states and 42024 transitions. [2023-04-02 06:17:31,522 INFO L78 Accepts]: Start accepts. Automaton has 27785 states and 42024 transitions. Word has length 72 [2023-04-02 06:17:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:31,522 INFO L495 AbstractCegarLoop]: Abstraction has 27785 states and 42024 transitions. [2023-04-02 06:17:31,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27785 states and 42024 transitions. [2023-04-02 06:17:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:17:31,524 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:31,524 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] [2023-04-02 06:17:31,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:17:31,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:31,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:31,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1357546976, now seen corresponding path program 1 times [2023-04-02 06:17:31,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:31,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573525052] [2023-04-02 06:17:31,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:31,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:31,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:31,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573525052] [2023-04-02 06:17:31,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573525052] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:31,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:31,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:17:31,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154846380] [2023-04-02 06:17:31,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:31,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:17:31,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:17:31,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:17:31,933 INFO L87 Difference]: Start difference. First operand 27785 states and 42024 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:39,595 INFO L93 Difference]: Finished difference Result 56683 states and 85161 transitions. [2023-04-02 06:17:39,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:17:39,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-02 06:17:39,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:39,757 INFO L225 Difference]: With dead ends: 56683 [2023-04-02 06:17:39,757 INFO L226 Difference]: Without dead ends: 56681 [2023-04-02 06:17:39,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:17:39,778 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 300 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:39,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 952 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:17:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56681 states. [2023-04-02 06:17:44,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56681 to 28937. [2023-04-02 06:17:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28937 states, 28933 states have (on average 1.4921715687968755) internal successors, (43173), 28933 states have internal predecessors, (43173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28937 states to 28937 states and 43176 transitions. [2023-04-02 06:17:44,188 INFO L78 Accepts]: Start accepts. Automaton has 28937 states and 43176 transitions. Word has length 72 [2023-04-02 06:17:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:44,189 INFO L495 AbstractCegarLoop]: Abstraction has 28937 states and 43176 transitions. [2023-04-02 06:17:44,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 28937 states and 43176 transitions. [2023-04-02 06:17:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:17:44,189 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:44,190 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] [2023-04-02 06:17:44,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:17:44,190 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:44,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:44,190 INFO L85 PathProgramCache]: Analyzing trace with hash -856096920, now seen corresponding path program 1 times [2023-04-02 06:17:44,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:44,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802405419] [2023-04-02 06:17:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:44,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:44,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:44,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:44,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802405419] [2023-04-02 06:17:44,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802405419] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:44,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:44,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:44,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981927882] [2023-04-02 06:17:44,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:44,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:44,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:44,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:44,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:44,424 INFO L87 Difference]: Start difference. First operand 28937 states and 43176 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:49,825 INFO L93 Difference]: Finished difference Result 65151 states and 97020 transitions. [2023-04-02 06:17:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:49,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:17:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:49,907 INFO L225 Difference]: With dead ends: 65151 [2023-04-02 06:17:49,907 INFO L226 Difference]: Without dead ends: 36253 [2023-04-02 06:17:49,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:17:49,963 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 115 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:49,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 389 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:17:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36253 states. [2023-04-02 06:17:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36253 to 36251. [2023-04-02 06:17:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36251 states, 36247 states have (on average 1.4824675145529285) internal successors, (53735), 36247 states have internal predecessors, (53735), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36251 states to 36251 states and 53738 transitions. [2023-04-02 06:17:55,091 INFO L78 Accepts]: Start accepts. Automaton has 36251 states and 53738 transitions. Word has length 73 [2023-04-02 06:17:55,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:55,091 INFO L495 AbstractCegarLoop]: Abstraction has 36251 states and 53738 transitions. [2023-04-02 06:17:55,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 36251 states and 53738 transitions. [2023-04-02 06:17:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 06:17:55,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:55,108 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] [2023-04-02 06:17:55,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:17:55,108 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:55,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash 889576233, now seen corresponding path program 1 times [2023-04-02 06:17:55,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:55,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514606205] [2023-04-02 06:17:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:55,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:55,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:17:55,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:55,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514606205] [2023-04-02 06:17:55,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514606205] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:17:55,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745175002] [2023-04-02 06:17:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:55,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:17:55,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:17:55,649 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) [2023-04-02 06:17:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 06:17:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:55,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 06:17:55,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:17:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:17:56,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:17:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:17:56,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745175002] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:17:56,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:17:56,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-04-02 06:17:56,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162446232] [2023-04-02 06:17:56,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:17:56,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 06:17:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 06:17:56,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-04-02 06:17:56,466 INFO L87 Difference]: Start difference. First operand 36251 states and 53738 transitions. Second operand has 12 states, 12 states have (on average 22.416666666666668) internal successors, (269), 11 states have internal predecessors, (269), 1 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) [2023-04-02 06:18:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:18:14,710 INFO L93 Difference]: Finished difference Result 150402 states and 224028 transitions. [2023-04-02 06:18:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 06:18:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 22.416666666666668) internal successors, (269), 11 states have internal predecessors, (269), 1 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 98 [2023-04-02 06:18:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:18:14,948 INFO L225 Difference]: With dead ends: 150402 [2023-04-02 06:18:14,948 INFO L226 Difference]: Without dead ends: 121504 [2023-04-02 06:18:15,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-04-02 06:18:15,021 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 1060 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 06:18:15,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1060 Valid, 1898 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 06:18:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121504 states. [2023-04-02 06:18:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121504 to 118331. [2023-04-02 06:18:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118331 states, 118327 states have (on average 1.474752169834442) internal successors, (174503), 118327 states have internal predecessors, (174503), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:18:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118331 states to 118331 states and 174506 transitions. [2023-04-02 06:18:32,708 INFO L78 Accepts]: Start accepts. Automaton has 118331 states and 174506 transitions. Word has length 98 [2023-04-02 06:18:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:18:32,708 INFO L495 AbstractCegarLoop]: Abstraction has 118331 states and 174506 transitions. [2023-04-02 06:18:32,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.416666666666668) internal successors, (269), 11 states have internal predecessors, (269), 1 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) [2023-04-02 06:18:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 118331 states and 174506 transitions. [2023-04-02 06:18:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 06:18:32,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:18:32,726 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:18:32,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 06:18:32,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 06:18:32,933 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:18:32,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:18:32,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2014627377, now seen corresponding path program 1 times [2023-04-02 06:18:32,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:18:32,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19634823] [2023-04-02 06:18:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:18:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:18:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:18:33,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:18:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:18:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:18:33,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:18:33,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19634823] [2023-04-02 06:18:33,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19634823] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:18:33,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:18:33,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:18:33,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651347122] [2023-04-02 06:18:33,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:18:33,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:18:33,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:18:33,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:18:33,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:18:33,250 INFO L87 Difference]: Start difference. First operand 118331 states and 174506 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:19:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:19:11,307 INFO L93 Difference]: Finished difference Result 294295 states and 436416 transitions. [2023-04-02 06:19:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:19:11,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-02 06:19:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:19:12,169 INFO L225 Difference]: With dead ends: 294295 [2023-04-02 06:19:12,169 INFO L226 Difference]: Without dead ends: 247381 [2023-04-02 06:19:12,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:19:12,273 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 1218 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 06:19:12,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 1655 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 06:19:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247381 states. [2023-04-02 06:19:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247381 to 161403. [2023-04-02 06:19:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161403 states, 161399 states have (on average 1.4713783852440225) internal successors, (237479), 161399 states have internal predecessors, (237479), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:19:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161403 states to 161403 states and 237482 transitions. [2023-04-02 06:19:40,131 INFO L78 Accepts]: Start accepts. Automaton has 161403 states and 237482 transitions. Word has length 99 [2023-04-02 06:19:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:19:40,131 INFO L495 AbstractCegarLoop]: Abstraction has 161403 states and 237482 transitions. [2023-04-02 06:19:40,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:19:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 161403 states and 237482 transitions. [2023-04-02 06:19:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 06:19:40,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:19:40,148 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:19:40,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:19:40,148 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:19:40,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:19:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash 780442639, now seen corresponding path program 1 times [2023-04-02 06:19:40,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:19:40,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27049354] [2023-04-02 06:19:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:19:40,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:19:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:19:40,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:19:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:19:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:19:40,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:19:40,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27049354] [2023-04-02 06:19:40,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27049354] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:19:40,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:19:40,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:19:40,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842016203] [2023-04-02 06:19:40,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:19:40,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:19:40,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:19:40,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:19:40,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:19:40,371 INFO L87 Difference]: Start difference. First operand 161403 states and 237482 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)