./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:03:01,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:03:01,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:03:01,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:03:01,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:03:01,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:03:01,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:03:01,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:03:01,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:03:01,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:03:01,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:03:01,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:03:01,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:03:01,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:03:01,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:03:01,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:03:01,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:03:01,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:03:01,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:03:01,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:03:01,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:03:01,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:03:01,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:03:01,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:03:01,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:03:01,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:03:01,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:03:01,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:03:01,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:03:01,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:03:01,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:03:01,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:03:01,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:03:01,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:03:01,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:03:01,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:03:01,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:03:01,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:03:01,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:03:01,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:03:01,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:03:01,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:03:01,507 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:03:01,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:03:01,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:03:01,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:03:01,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:03:01,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:03:01,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:03:01,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:03:01,510 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:03:01,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:03:01,511 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:03:01,511 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:03:01,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:03:01,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:03:01,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:03:01,512 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:03:01,512 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:03:01,512 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:03:01,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:03:01,512 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:03:01,512 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:03:01,512 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:03:01,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:03:01,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:03:01,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:03:01,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:03:01,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:03:01,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:03:01,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:03:01,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:03:01,514 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:03:01,514 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:03:01,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:03:01,514 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:03:01,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:03:01,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:03:01,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:03:01,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:03:01,781 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:03:01,781 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:03:01,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-29 22:03:02,697 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:03:02,971 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:03:02,972 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-29 22:03:02,985 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caeaafcc2/c8fec89eb6b244e492ef06897220dafd/FLAG073814511 [2023-08-29 22:03:02,997 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caeaafcc2/c8fec89eb6b244e492ef06897220dafd [2023-08-29 22:03:02,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:03:03,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:03:03,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:03:03,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:03:03,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:03:03,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:03:02" (1/1) ... [2023-08-29 22:03:03,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241ee0f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03, skipping insertion in model container [2023-08-29 22:03:03,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:03:02" (1/1) ... [2023-08-29 22:03:03,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:03:03,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:03:03,345 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2023-08-29 22:03:03,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:03:03,385 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:03:03,435 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2023-08-29 22:03:03,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:03:03,478 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:03:03,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03 WrapperNode [2023-08-29 22:03:03,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:03:03,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:03:03,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:03:03,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:03:03,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,518 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 204 [2023-08-29 22:03:03,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:03:03,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:03:03,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:03:03,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:03:03,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,556 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:03:03,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:03:03,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:03:03,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:03:03,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (1/1) ... [2023-08-29 22:03:03,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:03:03,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:03,597 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) [2023-08-29 22:03:03,602 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 [2023-08-29 22:03:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:03:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:03:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 22:03:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 22:03:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 22:03:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:03:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 22:03:03,624 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 22:03:03,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 22:03:03,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:03:03,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:03:03,625 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:03:03,724 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:03:03,726 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:03:03,993 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:03:03,999 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:03:03,999 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-29 22:03:04,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:03:04 BoogieIcfgContainer [2023-08-29 22:03:04,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:03:04,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:03:04,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:03:04,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:03:04,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:03:02" (1/3) ... [2023-08-29 22:03:04,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7351c48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:03:04, skipping insertion in model container [2023-08-29 22:03:04,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:03:03" (2/3) ... [2023-08-29 22:03:04,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7351c48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:03:04, skipping insertion in model container [2023-08-29 22:03:04,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:03:04" (3/3) ... [2023-08-29 22:03:04,006 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2023-08-29 22:03:04,016 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:03:04,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-08-29 22:03:04,016 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:03:04,093 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 22:03:04,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:04,187 INFO L130 PetriNetUnfolder]: 43/316 cut-off events. [2023-08-29 22:03:04,188 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 22:03:04,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 316 events. 43/316 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1168 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-29 22:03:04,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:04,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:04,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:04,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:04,227 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:04,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:04,291 INFO L130 PetriNetUnfolder]: 43/316 cut-off events. [2023-08-29 22:03:04,291 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 22:03:04,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 316 events. 43/316 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1168 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-29 22:03:04,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 12462 [2023-08-29 22:03:10,512 INFO L134 LiptonReduction]: Checked pairs total: 29978 [2023-08-29 22:03:10,513 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-29 22:03:10,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:03:10,525 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5b3ac1e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:10,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-29 22:03:10,527 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 22:03:10,528 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:10,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:10,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:10,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:10,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:10,531 INFO L85 PathProgramCache]: Analyzing trace with hash 27925, now seen corresponding path program 1 times [2023-08-29 22:03:10,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:10,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947522914] [2023-08-29 22:03:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:10,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:10,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:10,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947522914] [2023-08-29 22:03:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947522914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:10,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:10,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:10,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243977092] [2023-08-29 22:03:10,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:10,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:10,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:10,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 443 [2023-08-29 22:03:10,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:10,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:10,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 443 [2023-08-29 22:03:10,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:10,969 INFO L130 PetriNetUnfolder]: 602/1372 cut-off events. [2023-08-29 22:03:10,969 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 22:03:10,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2564 conditions, 1372 events. 602/1372 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9227 event pairs, 532 based on Foata normal form. 102/963 useless extension candidates. Maximal degree in co-relation 2481. Up to 1143 conditions per place. [2023-08-29 22:03:10,976 INFO L137 encePairwiseOnDemand]: 413/443 looper letters, 67 selfloop transitions, 1 changer transitions 5/86 dead transitions. [2023-08-29 22:03:10,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 326 flow [2023-08-29 22:03:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 698 transitions. [2023-08-29 22:03:10,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252069224981188 [2023-08-29 22:03:10,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 698 transitions. [2023-08-29 22:03:10,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 698 transitions. [2023-08-29 22:03:10,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:10,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 698 transitions. [2023-08-29 22:03:10,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:10,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:10,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:10,998 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 698 transitions. [2023-08-29 22:03:10,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 326 flow [2023-08-29 22:03:11,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:03:11,002 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 143 flow [2023-08-29 22:03:11,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2023-08-29 22:03:11,006 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-29 22:03:11,006 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 143 flow [2023-08-29 22:03:11,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:11,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:11,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 22:03:11,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:11,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash 28187, now seen corresponding path program 1 times [2023-08-29 22:03:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:11,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706207454] [2023-08-29 22:03:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:11,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706207454] [2023-08-29 22:03:11,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706207454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:11,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:11,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:11,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393071590] [2023-08-29 22:03:11,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:11,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:11,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:11,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 443 [2023-08-29 22:03:11,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:11,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 443 [2023-08-29 22:03:11,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:11,248 INFO L130 PetriNetUnfolder]: 540/1255 cut-off events. [2023-08-29 22:03:11,249 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-29 22:03:11,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2369 conditions, 1255 events. 540/1255 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8458 event pairs, 456 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 2291. Up to 982 conditions per place. [2023-08-29 22:03:11,253 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 66 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-29 22:03:11,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 313 flow [2023-08-29 22:03:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-29 22:03:11,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48833709556057187 [2023-08-29 22:03:11,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-29 22:03:11,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-29 22:03:11,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:11,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-29 22:03:11,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,260 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 143 flow. Second operand 3 states and 649 transitions. [2023-08-29 22:03:11,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 313 flow [2023-08-29 22:03:11,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 309 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:11,263 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 139 flow [2023-08-29 22:03:11,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-08-29 22:03:11,263 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-08-29 22:03:11,263 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 139 flow [2023-08-29 22:03:11,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:11,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:11,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 22:03:11,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:11,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash 28186, now seen corresponding path program 1 times [2023-08-29 22:03:11,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:11,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3429616] [2023-08-29 22:03:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:11,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:11,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:11,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3429616] [2023-08-29 22:03:11,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3429616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:11,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:11,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:11,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146773016] [2023-08-29 22:03:11,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:11,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:11,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:11,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:11,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 443 [2023-08-29 22:03:11,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:11,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 443 [2023-08-29 22:03:11,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:11,584 INFO L130 PetriNetUnfolder]: 540/1209 cut-off events. [2023-08-29 22:03:11,584 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 22:03:11,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2306 conditions, 1209 events. 540/1209 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8053 event pairs, 375 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 2267. Up to 1021 conditions per place. [2023-08-29 22:03:11,606 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 67 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-29 22:03:11,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 317 flow [2023-08-29 22:03:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-29 22:03:11,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4958615500376223 [2023-08-29 22:03:11,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-29 22:03:11,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-29 22:03:11,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:11,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-29 22:03:11,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,613 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 139 flow. Second operand 3 states and 659 transitions. [2023-08-29 22:03:11,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 317 flow [2023-08-29 22:03:11,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:11,615 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 145 flow [2023-08-29 22:03:11,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-08-29 22:03:11,615 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-08-29 22:03:11,615 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 145 flow [2023-08-29 22:03:11,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:11,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:11,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:03:11,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 22:03:11,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:11,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash 840389113, now seen corresponding path program 1 times [2023-08-29 22:03:11,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348573271] [2023-08-29 22:03:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:11,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:11,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348573271] [2023-08-29 22:03:11,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348573271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535626908] [2023-08-29 22:03:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:11,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:11,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:11,698 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) [2023-08-29 22:03:11,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 22:03:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:11,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:03:11,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:11,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2023-08-29 22:03:11,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 110 [2023-08-29 22:03:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:12,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:12,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535626908] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:12,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:12,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 7 [2023-08-29 22:03:12,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383936285] [2023-08-29 22:03:12,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:12,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 22:03:12,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:12,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 22:03:12,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-29 22:03:12,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 443 [2023-08-29 22:03:12,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 145 flow. Second operand has 9 states, 9 states have (on average 194.66666666666666) internal successors, (1752), 9 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:12,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 443 [2023-08-29 22:03:12,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:12,509 INFO L130 PetriNetUnfolder]: 39/122 cut-off events. [2023-08-29 22:03:12,511 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-29 22:03:12,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 122 events. 39/122 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 507 event pairs, 5 based on Foata normal form. 20/119 useless extension candidates. Maximal degree in co-relation 241. Up to 78 conditions per place. [2023-08-29 22:03:12,512 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 31 selfloop transitions, 2 changer transitions 11/51 dead transitions. [2023-08-29 22:03:12,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 199 flow [2023-08-29 22:03:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 817 transitions. [2023-08-29 22:03:12,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46106094808126413 [2023-08-29 22:03:12,514 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 817 transitions. [2023-08-29 22:03:12,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 817 transitions. [2023-08-29 22:03:12,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:12,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 817 transitions. [2023-08-29 22:03:12,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,519 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,519 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 145 flow. Second operand 4 states and 817 transitions. [2023-08-29 22:03:12,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 199 flow [2023-08-29 22:03:12,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 193 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:03:12,521 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 59 flow [2023-08-29 22:03:12,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-29 22:03:12,522 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -35 predicate places. [2023-08-29 22:03:12,522 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 59 flow [2023-08-29 22:03:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.66666666666666) internal successors, (1752), 9 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:12,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:03:12,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:12,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:12,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:12,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash 282236111, now seen corresponding path program 1 times [2023-08-29 22:03:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:12,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397612264] [2023-08-29 22:03:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:12,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397612264] [2023-08-29 22:03:12,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397612264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:12,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:12,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:12,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122278352] [2023-08-29 22:03:12,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:12,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:12,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:12,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:12,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:12,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 443 [2023-08-29 22:03:12,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:12,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 443 [2023-08-29 22:03:12,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:12,971 INFO L130 PetriNetUnfolder]: 22/79 cut-off events. [2023-08-29 22:03:12,971 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 22:03:12,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 79 events. 22/79 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 223 event pairs, 22 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 144. Up to 60 conditions per place. [2023-08-29 22:03:12,972 INFO L137 encePairwiseOnDemand]: 439/443 looper letters, 14 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-29 22:03:12,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 22 transitions, 83 flow [2023-08-29 22:03:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-29 22:03:12,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469525959367946 [2023-08-29 22:03:12,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-29 22:03:12,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-29 22:03:12,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:12,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-29 22:03:12,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,978 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 59 flow. Second operand 3 states and 594 transitions. [2023-08-29 22:03:12,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 22 transitions, 83 flow [2023-08-29 22:03:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 80 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:12,979 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 52 flow [2023-08-29 22:03:12,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-29 22:03:12,981 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -43 predicate places. [2023-08-29 22:03:12,981 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 52 flow [2023-08-29 22:03:12,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:12,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:12,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:12,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 22:03:12,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:12,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:12,984 INFO L85 PathProgramCache]: Analyzing trace with hash 159380380, now seen corresponding path program 1 times [2023-08-29 22:03:12,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:12,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436702371] [2023-08-29 22:03:12,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:12,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:13,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:13,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436702371] [2023-08-29 22:03:13,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436702371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:13,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:13,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393929583] [2023-08-29 22:03:13,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:13,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:13,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:13,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 443 [2023-08-29 22:03:13,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:13,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 443 [2023-08-29 22:03:13,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:13,202 INFO L130 PetriNetUnfolder]: 20/75 cut-off events. [2023-08-29 22:03:13,202 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:13,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 75 events. 20/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 212 event pairs, 12 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 143. Up to 35 conditions per place. [2023-08-29 22:03:13,203 INFO L137 encePairwiseOnDemand]: 440/443 looper letters, 14 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-29 22:03:13,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 87 flow [2023-08-29 22:03:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-08-29 22:03:13,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439428141459744 [2023-08-29 22:03:13,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-08-29 22:03:13,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-08-29 22:03:13,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:13,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-08-29 22:03:13,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,211 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 52 flow. Second operand 3 states and 590 transitions. [2023-08-29 22:03:13,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 87 flow [2023-08-29 22:03:13,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 86 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:03:13,212 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 53 flow [2023-08-29 22:03:13,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-29 22:03:13,214 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -43 predicate places. [2023-08-29 22:03:13,214 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 53 flow [2023-08-29 22:03:13,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:13,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:13,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 22:03:13,216 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 22:03:13,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash 159380240, now seen corresponding path program 1 times [2023-08-29 22:03:13,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:13,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259033705] [2023-08-29 22:03:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:13,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:13,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:13,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259033705] [2023-08-29 22:03:13,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259033705] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:13,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:13,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:13,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352892254] [2023-08-29 22:03:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:13,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:13,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:13,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 443 [2023-08-29 22:03:13,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:13,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 443 [2023-08-29 22:03:13,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:13,430 INFO L130 PetriNetUnfolder]: 18/58 cut-off events. [2023-08-29 22:03:13,430 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:13,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 58 events. 18/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 128 event pairs, 18 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 123. Up to 50 conditions per place. [2023-08-29 22:03:13,430 INFO L137 encePairwiseOnDemand]: 437/443 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-29 22:03:13,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 16 transitions, 69 flow [2023-08-29 22:03:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-08-29 22:03:13,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42663656884875845 [2023-08-29 22:03:13,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-08-29 22:03:13,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-08-29 22:03:13,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:13,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-08-29 22:03:13,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,436 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 53 flow. Second operand 3 states and 567 transitions. [2023-08-29 22:03:13,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 16 transitions, 69 flow [2023-08-29 22:03:13,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 16 transitions, 65 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:13,437 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-29 22:03:13,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-29 22:03:13,437 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -48 predicate places. [2023-08-29 22:03:13,437 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-29 22:03:13,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:13,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 38 remaining) [2023-08-29 22:03:13,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 38 remaining) [2023-08-29 22:03:13,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 38 remaining) [2023-08-29 22:03:13,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 38 remaining) [2023-08-29 22:03:13,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 38 remaining) [2023-08-29 22:03:13,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 38 remaining) [2023-08-29 22:03:13,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 38 remaining) [2023-08-29 22:03:13,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (30 of 38 remaining) [2023-08-29 22:03:13,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 38 remaining) [2023-08-29 22:03:13,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 38 remaining) [2023-08-29 22:03:13,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 38 remaining) [2023-08-29 22:03:13,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 38 remaining) [2023-08-29 22:03:13,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 38 remaining) [2023-08-29 22:03:13,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 38 remaining) [2023-08-29 22:03:13,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 38 remaining) [2023-08-29 22:03:13,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 38 remaining) [2023-08-29 22:03:13,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 38 remaining) [2023-08-29 22:03:13,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 38 remaining) [2023-08-29 22:03:13,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 38 remaining) [2023-08-29 22:03:13,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 38 remaining) [2023-08-29 22:03:13,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 38 remaining) [2023-08-29 22:03:13,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 38 remaining) [2023-08-29 22:03:13,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 38 remaining) [2023-08-29 22:03:13,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 38 remaining) [2023-08-29 22:03:13,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 38 remaining) [2023-08-29 22:03:13,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 38 remaining) [2023-08-29 22:03:13,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 38 remaining) [2023-08-29 22:03:13,443 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 38 remaining) [2023-08-29 22:03:13,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 38 remaining) [2023-08-29 22:03:13,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 38 remaining) [2023-08-29 22:03:13,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (7 of 38 remaining) [2023-08-29 22:03:13,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 38 remaining) [2023-08-29 22:03:13,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 38 remaining) [2023-08-29 22:03:13,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 38 remaining) [2023-08-29 22:03:13,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (3 of 38 remaining) [2023-08-29 22:03:13,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 38 remaining) [2023-08-29 22:03:13,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 38 remaining) [2023-08-29 22:03:13,445 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 38 remaining) [2023-08-29 22:03:13,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 22:03:13,445 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:13,447 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 22:03:13,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:13,467 INFO L130 PetriNetUnfolder]: 43/316 cut-off events. [2023-08-29 22:03:13,468 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 22:03:13,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 316 events. 43/316 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1168 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-29 22:03:13,469 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 229 transitions, 466 flow [2023-08-29 22:03:13,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 222 transitions, 449 flow [2023-08-29 22:03:13,470 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:13,470 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 222 transitions, 449 flow [2023-08-29 22:03:13,470 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 222 transitions, 449 flow [2023-08-29 22:03:13,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 449 flow [2023-08-29 22:03:13,484 INFO L130 PetriNetUnfolder]: 41/309 cut-off events. [2023-08-29 22:03:13,484 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:13,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 309 events. 41/309 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1167 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-08-29 22:03:13,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 12462 [2023-08-29 22:03:19,673 INFO L134 LiptonReduction]: Checked pairs total: 32212 [2023-08-29 22:03:19,673 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-29 22:03:19,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 22:03:19,674 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5b3ac1e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:19,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 22:03:19,678 INFO L130 PetriNetUnfolder]: 9/49 cut-off events. [2023-08-29 22:03:19,678 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:19,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:19,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 22:03:19,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:03:19,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1900079077, now seen corresponding path program 1 times [2023-08-29 22:03:19,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:19,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367741791] [2023-08-29 22:03:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:03:19,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 22:03:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:03:19,714 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 22:03:19,714 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 22:03:19,714 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 22:03:19,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 22:03:19,715 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 22:03:19,718 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 22:03:19,719 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 22:03:19,719 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 22:03:19,748 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 22:03:19,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:19,782 INFO L130 PetriNetUnfolder]: 72/501 cut-off events. [2023-08-29 22:03:19,782 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:03:19,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 72/501 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2217 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 318. Up to 12 conditions per place. [2023-08-29 22:03:19,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:19,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:19,788 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:03:19,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:19,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:19,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:03:19,819 INFO L130 PetriNetUnfolder]: 72/501 cut-off events. [2023-08-29 22:03:19,819 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:03:19,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 72/501 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2217 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 318. Up to 12 conditions per place. [2023-08-29 22:03:19,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 35376 [2023-08-29 22:03:25,732 INFO L134 LiptonReduction]: Checked pairs total: 89185 [2023-08-29 22:03:25,732 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-08-29 22:03:25,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:03:25,734 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5b3ac1e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:03:25,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-08-29 22:03:25,735 INFO L130 PetriNetUnfolder]: 0/4 cut-off events. [2023-08-29 22:03:25,735 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:03:25,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:25,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:25,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:25,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:25,736 INFO L85 PathProgramCache]: Analyzing trace with hash 55496, now seen corresponding path program 1 times [2023-08-29 22:03:25,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:25,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199344007] [2023-08-29 22:03:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:25,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:25,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:25,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199344007] [2023-08-29 22:03:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199344007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:25,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:25,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:25,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941423871] [2023-08-29 22:03:25,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:25,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:25,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:25,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 567 [2023-08-29 22:03:25,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 136 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:25,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:25,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 567 [2023-08-29 22:03:25,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:27,950 INFO L130 PetriNetUnfolder]: 24517/40654 cut-off events. [2023-08-29 22:03:27,951 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-29 22:03:27,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77276 conditions, 40654 events. 24517/40654 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 359331 event pairs, 11305 based on Foata normal form. 3334/31531 useless extension candidates. Maximal degree in co-relation 7066. Up to 36445 conditions per place. [2023-08-29 22:03:28,114 INFO L137 encePairwiseOnDemand]: 523/567 looper letters, 95 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-08-29 22:03:28,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 450 flow [2023-08-29 22:03:28,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-08-29 22:03:28,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314520870076426 [2023-08-29 22:03:28,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-08-29 22:03:28,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-08-29 22:03:28,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:28,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-08-29 22:03:28,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:28,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:28,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:28,122 INFO L175 Difference]: Start difference. First operand has 103 places, 136 transitions, 290 flow. Second operand 3 states and 904 transitions. [2023-08-29 22:03:28,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 450 flow [2023-08-29 22:03:28,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 119 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:03:28,124 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 224 flow [2023-08-29 22:03:28,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2023-08-29 22:03:28,125 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:03:28,125 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 224 flow [2023-08-29 22:03:28,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:28,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:28,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:28,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 22:03:28,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:28,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:28,126 INFO L85 PathProgramCache]: Analyzing trace with hash 55494, now seen corresponding path program 1 times [2023-08-29 22:03:28,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:28,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447562777] [2023-08-29 22:03:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:28,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:28,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:28,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447562777] [2023-08-29 22:03:28,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447562777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:28,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:28,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:28,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460462261] [2023-08-29 22:03:28,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:28,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:28,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:28,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:28,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:28,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 567 [2023-08-29 22:03:28,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:28,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:28,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 567 [2023-08-29 22:03:28,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:30,099 INFO L130 PetriNetUnfolder]: 23189/38059 cut-off events. [2023-08-29 22:03:30,099 INFO L131 PetriNetUnfolder]: For 1003/1003 co-relation queries the response was YES. [2023-08-29 22:03:30,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73447 conditions, 38059 events. 23189/38059 cut-off events. For 1003/1003 co-relation queries the response was YES. Maximal size of possible extension queue 1865. Compared 331063 event pairs, 20152 based on Foata normal form. 0/27122 useless extension candidates. Maximal degree in co-relation 73296. Up to 31306 conditions per place. [2023-08-29 22:03:30,245 INFO L137 encePairwiseOnDemand]: 563/567 looper letters, 110 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2023-08-29 22:03:30,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 522 flow [2023-08-29 22:03:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 857 transitions. [2023-08-29 22:03:30,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038212815990594 [2023-08-29 22:03:30,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 857 transitions. [2023-08-29 22:03:30,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 857 transitions. [2023-08-29 22:03:30,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:30,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 857 transitions. [2023-08-29 22:03:30,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,252 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 224 flow. Second operand 3 states and 857 transitions. [2023-08-29 22:03:30,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 522 flow [2023-08-29 22:03:30,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 520 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:03:30,257 INFO L231 Difference]: Finished difference. Result has 97 places, 95 transitions, 222 flow [2023-08-29 22:03:30,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=97, PETRI_TRANSITIONS=95} [2023-08-29 22:03:30,258 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -6 predicate places. [2023-08-29 22:03:30,258 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 95 transitions, 222 flow [2023-08-29 22:03:30,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:30,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:03:30,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 22:03:30,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:30,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 55034, now seen corresponding path program 1 times [2023-08-29 22:03:30,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:30,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022836365] [2023-08-29 22:03:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:30,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:30,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022836365] [2023-08-29 22:03:30,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022836365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:30,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:30,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:03:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051178611] [2023-08-29 22:03:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:30,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:03:30,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:03:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:03:30,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-08-29 22:03:30,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:30,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:30,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-08-29 22:03:30,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:32,170 INFO L130 PetriNetUnfolder]: 24105/39056 cut-off events. [2023-08-29 22:03:32,170 INFO L131 PetriNetUnfolder]: For 1204/1204 co-relation queries the response was YES. [2023-08-29 22:03:32,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76187 conditions, 39056 events. 24105/39056 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 1907. Compared 333512 event pairs, 21828 based on Foata normal form. 0/27860 useless extension candidates. Maximal degree in co-relation 67753. Up to 33907 conditions per place. [2023-08-29 22:03:32,323 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 111 selfloop transitions, 1 changer transitions 2/135 dead transitions. [2023-08-29 22:03:32,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 135 transitions, 530 flow [2023-08-29 22:03:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:03:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:03:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2023-08-29 22:03:32,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-08-29 22:03:32,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2023-08-29 22:03:32,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2023-08-29 22:03:32,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:32,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2023-08-29 22:03:32,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,330 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 222 flow. Second operand 3 states and 864 transitions. [2023-08-29 22:03:32,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 135 transitions, 530 flow [2023-08-29 22:03:32,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 526 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:32,351 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 221 flow [2023-08-29 22:03:32,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2023-08-29 22:03:32,352 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:03:32,352 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 221 flow [2023-08-29 22:03:32,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:32,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:03:32,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 22:03:32,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:32,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash -244463375, now seen corresponding path program 1 times [2023-08-29 22:03:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:32,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643638468] [2023-08-29 22:03:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:32,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:32,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:32,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643638468] [2023-08-29 22:03:32,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643638468] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:32,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:32,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:32,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175632219] [2023-08-29 22:03:32,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:32,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:32,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:32,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:32,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 567 [2023-08-29 22:03:32,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:32,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:32,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 567 [2023-08-29 22:03:32,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:33,950 INFO L130 PetriNetUnfolder]: 16971/28136 cut-off events. [2023-08-29 22:03:33,950 INFO L131 PetriNetUnfolder]: For 1094/1094 co-relation queries the response was YES. [2023-08-29 22:03:33,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54652 conditions, 28136 events. 16971/28136 cut-off events. For 1094/1094 co-relation queries the response was YES. Maximal size of possible extension queue 1399. Compared 237681 event pairs, 14626 based on Foata normal form. 2408/22104 useless extension candidates. Maximal degree in co-relation 52399. Up to 22837 conditions per place. [2023-08-29 22:03:34,063 INFO L137 encePairwiseOnDemand]: 559/567 looper letters, 97 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-08-29 22:03:34,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 121 transitions, 473 flow [2023-08-29 22:03:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1078 transitions. [2023-08-29 22:03:34,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2023-08-29 22:03:34,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1078 transitions. [2023-08-29 22:03:34,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1078 transitions. [2023-08-29 22:03:34,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:34,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1078 transitions. [2023-08-29 22:03:34,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,071 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,071 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 221 flow. Second operand 4 states and 1078 transitions. [2023-08-29 22:03:34,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 121 transitions, 473 flow [2023-08-29 22:03:34,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 121 transitions, 469 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:34,133 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 209 flow [2023-08-29 22:03:34,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-08-29 22:03:34,134 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -10 predicate places. [2023-08-29 22:03:34,134 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 209 flow [2023-08-29 22:03:34,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.5) internal successors, (974), 4 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:34,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 22:03:34,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 22:03:34,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:34,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash -244830664, now seen corresponding path program 1 times [2023-08-29 22:03:34,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:34,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801262966] [2023-08-29 22:03:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:34,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:34,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:34,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801262966] [2023-08-29 22:03:34,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801262966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:34,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490888308] [2023-08-29 22:03:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:34,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:34,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:34,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:03:34,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 22:03:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 22:03:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:34,456 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:03:34,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 301 [2023-08-29 22:03:34,476 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:03:34,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 286 treesize of output 287 [2023-08-29 22:03:34,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:34,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 188 [2023-08-29 22:03:34,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:34,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 22:03:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:34,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:34,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490888308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:34,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:34,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 22:03:34,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795680956] [2023-08-29 22:03:34,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:34,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:03:34,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:34,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:03:34,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:03:34,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 567 [2023-08-29 22:03:34,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 209 flow. Second operand has 8 states, 8 states have (on average 248.875) internal successors, (1991), 8 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:34,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:34,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 567 [2023-08-29 22:03:34,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:36,135 INFO L130 PetriNetUnfolder]: 15685/26051 cut-off events. [2023-08-29 22:03:36,135 INFO L131 PetriNetUnfolder]: For 824/824 co-relation queries the response was YES. [2023-08-29 22:03:36,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51009 conditions, 26051 events. 15685/26051 cut-off events. For 824/824 co-relation queries the response was YES. Maximal size of possible extension queue 1299. Compared 219973 event pairs, 3363 based on Foata normal form. 18/19094 useless extension candidates. Maximal degree in co-relation 46165. Up to 20586 conditions per place. [2023-08-29 22:03:36,266 INFO L137 encePairwiseOnDemand]: 562/567 looper letters, 146 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2023-08-29 22:03:36,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 172 transitions, 675 flow [2023-08-29 22:03:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:03:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:03:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1388 transitions. [2023-08-29 22:03:36,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48959435626102293 [2023-08-29 22:03:36,269 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1388 transitions. [2023-08-29 22:03:36,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1388 transitions. [2023-08-29 22:03:36,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:36,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1388 transitions. [2023-08-29 22:03:36,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.6) internal successors, (1388), 5 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,275 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,275 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 209 flow. Second operand 5 states and 1388 transitions. [2023-08-29 22:03:36,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 172 transitions, 675 flow [2023-08-29 22:03:36,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 172 transitions, 672 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:36,293 INFO L231 Difference]: Finished difference. Result has 95 places, 87 transitions, 214 flow [2023-08-29 22:03:36,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=95, PETRI_TRANSITIONS=87} [2023-08-29 22:03:36,294 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -8 predicate places. [2023-08-29 22:03:36,294 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 87 transitions, 214 flow [2023-08-29 22:03:36,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 248.875) internal successors, (1991), 8 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:36,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:36,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 22:03:36,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-29 22:03:36,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:36,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:36,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1011563040, now seen corresponding path program 1 times [2023-08-29 22:03:36,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:36,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104900351] [2023-08-29 22:03:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:36,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:36,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:36,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104900351] [2023-08-29 22:03:36,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104900351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:36,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:36,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:36,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282906977] [2023-08-29 22:03:36,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:36,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:36,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:36,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:36,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 567 [2023-08-29 22:03:36,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 87 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:36,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:36,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 567 [2023-08-29 22:03:36,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:37,812 INFO L130 PetriNetUnfolder]: 11995/19693 cut-off events. [2023-08-29 22:03:37,812 INFO L131 PetriNetUnfolder]: For 1444/1444 co-relation queries the response was YES. [2023-08-29 22:03:37,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39989 conditions, 19693 events. 11995/19693 cut-off events. For 1444/1444 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 150021 event pairs, 9556 based on Foata normal form. 0/16186 useless extension candidates. Maximal degree in co-relation 18156. Up to 14533 conditions per place. [2023-08-29 22:03:37,893 INFO L137 encePairwiseOnDemand]: 543/567 looper letters, 110 selfloop transitions, 14 changer transitions 0/142 dead transitions. [2023-08-29 22:03:37,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 142 transitions, 573 flow [2023-08-29 22:03:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1055 transitions. [2023-08-29 22:03:37,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4651675485008818 [2023-08-29 22:03:37,895 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1055 transitions. [2023-08-29 22:03:37,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1055 transitions. [2023-08-29 22:03:37,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:37,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1055 transitions. [2023-08-29 22:03:37,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.75) internal successors, (1055), 4 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,900 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,900 INFO L175 Difference]: Start difference. First operand has 95 places, 87 transitions, 214 flow. Second operand 4 states and 1055 transitions. [2023-08-29 22:03:37,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 142 transitions, 573 flow [2023-08-29 22:03:37,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 142 transitions, 565 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 22:03:37,905 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 350 flow [2023-08-29 22:03:37,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2023-08-29 22:03:37,906 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-29 22:03:37,906 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 350 flow [2023-08-29 22:03:37,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.5) internal successors, (918), 4 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:37,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:37,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:37,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 22:03:37,906 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:37,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:37,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1011563194, now seen corresponding path program 1 times [2023-08-29 22:03:37,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:37,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346126712] [2023-08-29 22:03:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:37,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:37,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:37,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346126712] [2023-08-29 22:03:37,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346126712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:37,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:03:37,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:03:37,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108114494] [2023-08-29 22:03:37,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:37,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:03:37,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:03:37,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:03:38,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 567 [2023-08-29 22:03:38,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 245.5) internal successors, (982), 4 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:38,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:38,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 567 [2023-08-29 22:03:38,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:39,598 INFO L130 PetriNetUnfolder]: 14592/24885 cut-off events. [2023-08-29 22:03:39,598 INFO L131 PetriNetUnfolder]: For 6663/6784 co-relation queries the response was YES. [2023-08-29 22:03:39,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57950 conditions, 24885 events. 14592/24885 cut-off events. For 6663/6784 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 206905 event pairs, 4603 based on Foata normal form. 0/21558 useless extension candidates. Maximal degree in co-relation 48547. Up to 14525 conditions per place. [2023-08-29 22:03:39,675 INFO L137 encePairwiseOnDemand]: 554/567 looper letters, 163 selfloop transitions, 20 changer transitions 0/206 dead transitions. [2023-08-29 22:03:39,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 206 transitions, 1068 flow [2023-08-29 22:03:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1141 transitions. [2023-08-29 22:03:39,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2023-08-29 22:03:39,679 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1141 transitions. [2023-08-29 22:03:39,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1141 transitions. [2023-08-29 22:03:39,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:39,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1141 transitions. [2023-08-29 22:03:39,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:39,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:39,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:39,683 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 350 flow. Second operand 4 states and 1141 transitions. [2023-08-29 22:03:39,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 206 transitions, 1068 flow [2023-08-29 22:03:39,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 206 transitions, 1064 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:03:39,699 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 554 flow [2023-08-29 22:03:39,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=103, PETRI_TRANSITIONS=118} [2023-08-29 22:03:39,699 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 0 predicate places. [2023-08-29 22:03:39,699 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 554 flow [2023-08-29 22:03:39,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 245.5) internal successors, (982), 4 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:39,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:39,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:39,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 22:03:39,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:39,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash -665276673, now seen corresponding path program 1 times [2023-08-29 22:03:39,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:39,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144601747] [2023-08-29 22:03:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:39,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144601747] [2023-08-29 22:03:39,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144601747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648481915] [2023-08-29 22:03:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:39,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:39,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:39,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:03:39,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 22:03:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 22:03:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:39,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:39,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648481915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:39,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:39,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 22:03:39,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113977217] [2023-08-29 22:03:39,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:39,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:03:39,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:03:39,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:03:39,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 567 [2023-08-29 22:03:39,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 118 transitions, 554 flow. Second operand has 8 states, 8 states have (on average 253.25) internal successors, (2026), 8 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:39,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:39,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 567 [2023-08-29 22:03:39,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:40,113 INFO L130 PetriNetUnfolder]: 1114/2166 cut-off events. [2023-08-29 22:03:40,114 INFO L131 PetriNetUnfolder]: For 1787/1809 co-relation queries the response was YES. [2023-08-29 22:03:40,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6032 conditions, 2166 events. 1114/2166 cut-off events. For 1787/1809 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13941 event pairs, 124 based on Foata normal form. 241/2310 useless extension candidates. Maximal degree in co-relation 6020. Up to 1350 conditions per place. [2023-08-29 22:03:40,119 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 59 selfloop transitions, 3 changer transitions 23/97 dead transitions. [2023-08-29 22:03:40,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 575 flow [2023-08-29 22:03:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:03:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:03:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1328 transitions. [2023-08-29 22:03:40,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46843033509700177 [2023-08-29 22:03:40,122 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1328 transitions. [2023-08-29 22:03:40,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1328 transitions. [2023-08-29 22:03:40,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:40,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1328 transitions. [2023-08-29 22:03:40,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 265.6) internal successors, (1328), 5 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:40,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:40,127 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:40,127 INFO L175 Difference]: Start difference. First operand has 103 places, 118 transitions, 554 flow. Second operand 5 states and 1328 transitions. [2023-08-29 22:03:40,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 575 flow [2023-08-29 22:03:40,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 97 transitions, 567 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-29 22:03:40,130 INFO L231 Difference]: Finished difference. Result has 60 places, 40 transitions, 147 flow [2023-08-29 22:03:40,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=60, PETRI_TRANSITIONS=40} [2023-08-29 22:03:40,131 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -43 predicate places. [2023-08-29 22:03:40,131 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 40 transitions, 147 flow [2023-08-29 22:03:40,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 253.25) internal successors, (2026), 8 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:40,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:40,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:40,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 22:03:40,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:40,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:40,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash 106297918, now seen corresponding path program 1 times [2023-08-29 22:03:40,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:40,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375495729] [2023-08-29 22:03:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:40,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:40,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:40,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375495729] [2023-08-29 22:03:40,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375495729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:40,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156587065] [2023-08-29 22:03:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:40,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:40,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:40,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:03:40,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 22:03:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:40,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:03:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:40,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 22:03:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:40,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:03:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:40,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:03:40,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156587065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:03:40,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:03:40,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-29 22:03:40,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813581713] [2023-08-29 22:03:40,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:03:40,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:03:40,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:40,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:03:40,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:03:40,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 567 [2023-08-29 22:03:40,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 40 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:40,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:40,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 567 [2023-08-29 22:03:40,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:40,817 INFO L130 PetriNetUnfolder]: 488/948 cut-off events. [2023-08-29 22:03:40,817 INFO L131 PetriNetUnfolder]: For 628/628 co-relation queries the response was YES. [2023-08-29 22:03:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2418 conditions, 948 events. 488/948 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4871 event pairs, 177 based on Foata normal form. 102/965 useless extension candidates. Maximal degree in co-relation 2409. Up to 557 conditions per place. [2023-08-29 22:03:40,818 INFO L137 encePairwiseOnDemand]: 556/567 looper letters, 32 selfloop transitions, 11 changer transitions 2/52 dead transitions. [2023-08-29 22:03:40,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 275 flow [2023-08-29 22:03:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 973 transitions. [2023-08-29 22:03:40,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42901234567901236 [2023-08-29 22:03:40,820 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 973 transitions. [2023-08-29 22:03:40,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 973 transitions. [2023-08-29 22:03:40,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:40,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 973 transitions. [2023-08-29 22:03:40,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.25) internal successors, (973), 4 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:40,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:40,824 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:40,824 INFO L175 Difference]: Start difference. First operand has 60 places, 40 transitions, 147 flow. Second operand 4 states and 973 transitions. [2023-08-29 22:03:40,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 275 flow [2023-08-29 22:03:40,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 240 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-29 22:03:40,826 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 137 flow [2023-08-29 22:03:40,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-08-29 22:03:40,826 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -49 predicate places. [2023-08-29 22:03:40,826 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 137 flow [2023-08-29 22:03:40,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:40,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:40,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:40,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 22:03:41,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-29 22:03:41,031 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:41,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2014181909, now seen corresponding path program 1 times [2023-08-29 22:03:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:41,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762766377] [2023-08-29 22:03:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:41,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:41,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:41,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762766377] [2023-08-29 22:03:41,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762766377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:41,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483442324] [2023-08-29 22:03:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:41,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:41,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:41,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:03:41,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 22:03:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:41,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 22:03:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:41,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-29 22:03:41,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:41,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 22:03:41,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:03:41,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-29 22:03:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:41,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:41,264 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_321 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_321) |c_~#A~0.base|) (+ |c_~#A~0.offset| 12)) 0))) is different from false [2023-08-29 22:03:41,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:03:41,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-29 22:03:41,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-08-29 22:03:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:41,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483442324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:41,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:41,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-29 22:03:41,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952612391] [2023-08-29 22:03:41,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:41,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:03:41,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:41,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:03:41,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=45, Unknown=1, NotChecked=14, Total=90 [2023-08-29 22:03:41,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 567 [2023-08-29 22:03:41,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 137 flow. Second operand has 10 states, 10 states have (on average 187.5) internal successors, (1875), 10 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:41,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:41,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 567 [2023-08-29 22:03:41,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:41,390 INFO L130 PetriNetUnfolder]: 119/315 cut-off events. [2023-08-29 22:03:41,390 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-29 22:03:41,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 315 events. 119/315 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1388 event pairs, 7 based on Foata normal form. 72/372 useless extension candidates. Maximal degree in co-relation 848. Up to 262 conditions per place. [2023-08-29 22:03:41,391 INFO L137 encePairwiseOnDemand]: 562/567 looper letters, 33 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-08-29 22:03:41,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 44 transitions, 232 flow [2023-08-29 22:03:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:03:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:03:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 774 transitions. [2023-08-29 22:03:41,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2023-08-29 22:03:41,393 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 774 transitions. [2023-08-29 22:03:41,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 774 transitions. [2023-08-29 22:03:41,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:41,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 774 transitions. [2023-08-29 22:03:41,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:41,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:41,396 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:41,396 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 137 flow. Second operand 4 states and 774 transitions. [2023-08-29 22:03:41,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 44 transitions, 232 flow [2023-08-29 22:03:41,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 210 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:03:41,398 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 125 flow [2023-08-29 22:03:41,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-08-29 22:03:41,398 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -49 predicate places. [2023-08-29 22:03:41,400 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 125 flow [2023-08-29 22:03:41,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 187.5) internal successors, (1875), 10 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:41,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:41,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:41,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:41,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 22:03:41,605 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:41,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:41,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1447473421, now seen corresponding path program 1 times [2023-08-29 22:03:41,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:41,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169532069] [2023-08-29 22:03:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:41,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:41,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:41,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169532069] [2023-08-29 22:03:41,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169532069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:41,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007604954] [2023-08-29 22:03:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:41,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:41,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:41,833 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:03:41,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 22:03:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:41,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 22:03:41,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:42,088 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:03:42,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 301 [2023-08-29 22:03:42,111 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:03:42,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 286 treesize of output 287 [2023-08-29 22:03:42,190 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-29 22:03:42,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 167 [2023-08-29 22:03:42,300 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-29 22:03:42,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 79 [2023-08-29 22:03:42,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:03:42,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:03:42,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:03:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:42,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:03:42,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007604954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:42,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:42,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2023-08-29 22:03:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574068007] [2023-08-29 22:03:42,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:42,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:03:42,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:42,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:03:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-08-29 22:03:44,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:03:46,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:03:48,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:03:50,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:03:52,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:03:55,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:03:57,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:03:57,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 567 [2023-08-29 22:03:57,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 125 flow. Second operand has 13 states, 13 states have (on average 235.92307692307693) internal successors, (3067), 13 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:57,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:57,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 567 [2023-08-29 22:03:57,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:03:58,229 INFO L130 PetriNetUnfolder]: 136/426 cut-off events. [2023-08-29 22:03:58,229 INFO L131 PetriNetUnfolder]: For 225/225 co-relation queries the response was YES. [2023-08-29 22:03:58,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 426 events. 136/426 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2223 event pairs, 36 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 1049. Up to 149 conditions per place. [2023-08-29 22:03:58,230 INFO L137 encePairwiseOnDemand]: 559/567 looper letters, 57 selfloop transitions, 12 changer transitions 11/91 dead transitions. [2023-08-29 22:03:58,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 91 transitions, 476 flow [2023-08-29 22:03:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:03:58,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:03:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2407 transitions. [2023-08-29 22:03:58,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42451499118165786 [2023-08-29 22:03:58,233 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2407 transitions. [2023-08-29 22:03:58,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2407 transitions. [2023-08-29 22:03:58,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:03:58,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2407 transitions. [2023-08-29 22:03:58,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 240.7) internal successors, (2407), 10 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:58,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 567.0) internal successors, (6237), 11 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:58,240 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 567.0) internal successors, (6237), 11 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:58,240 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 125 flow. Second operand 10 states and 2407 transitions. [2023-08-29 22:03:58,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 91 transitions, 476 flow [2023-08-29 22:03:58,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 91 transitions, 465 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:03:58,242 INFO L231 Difference]: Finished difference. Result has 64 places, 50 transitions, 203 flow [2023-08-29 22:03:58,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=203, PETRI_PLACES=64, PETRI_TRANSITIONS=50} [2023-08-29 22:03:58,242 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -39 predicate places. [2023-08-29 22:03:58,243 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 50 transitions, 203 flow [2023-08-29 22:03:58,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 235.92307692307693) internal successors, (3067), 13 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:58,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:03:58,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:03:58,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:03:58,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:58,448 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:03:58,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:03:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1937546215, now seen corresponding path program 2 times [2023-08-29 22:03:58,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:03:58,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664209246] [2023-08-29 22:03:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:03:58,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:03:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:03:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:58,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:03:58,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664209246] [2023-08-29 22:03:58,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664209246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:03:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729413523] [2023-08-29 22:03:58,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:03:58,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:03:58,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:03:58,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:03:58,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 22:03:58,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:03:58,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:03:58,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 22:03:58,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:03:59,033 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:03:59,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 301 [2023-08-29 22:03:59,050 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:03:59,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 286 treesize of output 287 [2023-08-29 22:03:59,116 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-29 22:03:59,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 167 [2023-08-29 22:03:59,228 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-29 22:03:59,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 79 [2023-08-29 22:03:59,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:03:59,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:03:59,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:03:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:03:59,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:03:59,455 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_467 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_467) |c_~#A~0.base|) |c_~#A~0.offset|) 1)) is different from false [2023-08-29 22:03:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-29 22:03:59,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729413523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:03:59,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:03:59,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 18 [2023-08-29 22:03:59,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490677519] [2023-08-29 22:03:59,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:03:59,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 22:03:59,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:03:59,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 22:03:59,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=283, Unknown=1, NotChecked=34, Total=380 [2023-08-29 22:03:59,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 567 [2023-08-29 22:03:59,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 50 transitions, 203 flow. Second operand has 20 states, 20 states have (on average 174.45) internal successors, (3489), 20 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:03:59,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:03:59,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 567 [2023-08-29 22:03:59,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:00,505 INFO L130 PetriNetUnfolder]: 171/548 cut-off events. [2023-08-29 22:04:00,505 INFO L131 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2023-08-29 22:04:00,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 548 events. 171/548 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3176 event pairs, 22 based on Foata normal form. 5/526 useless extension candidates. Maximal degree in co-relation 1503. Up to 129 conditions per place. [2023-08-29 22:04:00,506 INFO L137 encePairwiseOnDemand]: 558/567 looper letters, 17 selfloop transitions, 4 changer transitions 71/99 dead transitions. [2023-08-29 22:04:00,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 585 flow [2023-08-29 22:04:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 22:04:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 22:04:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2313 transitions. [2023-08-29 22:04:00,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3137973137973138 [2023-08-29 22:04:00,509 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2313 transitions. [2023-08-29 22:04:00,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2313 transitions. [2023-08-29 22:04:00,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:00,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2313 transitions. [2023-08-29 22:04:00,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 177.92307692307693) internal successors, (2313), 13 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:00,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 567.0) internal successors, (7938), 14 states have internal predecessors, (7938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:00,518 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 567.0) internal successors, (7938), 14 states have internal predecessors, (7938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:00,518 INFO L175 Difference]: Start difference. First operand has 64 places, 50 transitions, 203 flow. Second operand 13 states and 2313 transitions. [2023-08-29 22:04:00,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 585 flow [2023-08-29 22:04:00,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 542 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-29 22:04:00,520 INFO L231 Difference]: Finished difference. Result has 74 places, 27 transitions, 107 flow [2023-08-29 22:04:00,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=107, PETRI_PLACES=74, PETRI_TRANSITIONS=27} [2023-08-29 22:04:00,520 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -29 predicate places. [2023-08-29 22:04:00,520 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 27 transitions, 107 flow [2023-08-29 22:04:00,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 174.45) internal successors, (3489), 20 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:00,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:00,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:00,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-29 22:04:00,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:04:00,726 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:04:00,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1323633613, now seen corresponding path program 1 times [2023-08-29 22:04:00,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454601438] [2023-08-29 22:04:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:04:00,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:00,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454601438] [2023-08-29 22:04:00,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454601438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:04:00,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957123505] [2023-08-29 22:04:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:00,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:04:00,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:04:00,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:04:00,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 22:04:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:01,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-29 22:04:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:04:01,195 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:04:01,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 301 [2023-08-29 22:04:01,210 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:04:01,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 286 treesize of output 287 [2023-08-29 22:04:01,273 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-29 22:04:01,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 167 [2023-08-29 22:04:01,382 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-29 22:04:01,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 79 [2023-08-29 22:04:01,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 22:04:01,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:04:01,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-29 22:04:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:01,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:04:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 22:04:01,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957123505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:04:01,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:04:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2023-08-29 22:04:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640830258] [2023-08-29 22:04:01,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:04:01,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 22:04:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 22:04:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-08-29 22:04:03,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:04:05,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:04:07,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:04:09,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:04:12,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 22:04:13,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 567 [2023-08-29 22:04:13,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 27 transitions, 107 flow. Second operand has 13 states, 13 states have (on average 237.76923076923077) internal successors, (3091), 13 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:13,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:13,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 567 [2023-08-29 22:04:13,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:13,310 INFO L130 PetriNetUnfolder]: 30/132 cut-off events. [2023-08-29 22:04:13,310 INFO L131 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2023-08-29 22:04:13,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 132 events. 30/132 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 410 event pairs, 14 based on Foata normal form. 4/135 useless extension candidates. Maximal degree in co-relation 366. Up to 39 conditions per place. [2023-08-29 22:04:13,311 INFO L137 encePairwiseOnDemand]: 559/567 looper letters, 23 selfloop transitions, 11 changer transitions 9/50 dead transitions. [2023-08-29 22:04:13,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 302 flow [2023-08-29 22:04:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:04:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:04:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2864 transitions. [2023-08-29 22:04:13,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209288653733098 [2023-08-29 22:04:13,315 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2864 transitions. [2023-08-29 22:04:13,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2864 transitions. [2023-08-29 22:04:13,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:13,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2864 transitions. [2023-08-29 22:04:13,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 238.66666666666666) internal successors, (2864), 12 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:13,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:13,323 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:13,323 INFO L175 Difference]: Start difference. First operand has 74 places, 27 transitions, 107 flow. Second operand 12 states and 2864 transitions. [2023-08-29 22:04:13,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 302 flow [2023-08-29 22:04:13,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 258 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-08-29 22:04:13,324 INFO L231 Difference]: Finished difference. Result has 56 places, 32 transitions, 152 flow [2023-08-29 22:04:13,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=152, PETRI_PLACES=56, PETRI_TRANSITIONS=32} [2023-08-29 22:04:13,324 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -47 predicate places. [2023-08-29 22:04:13,324 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 32 transitions, 152 flow [2023-08-29 22:04:13,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 237.76923076923077) internal successors, (3091), 13 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:13,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:13,325 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:13,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:04:13,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-29 22:04:13,525 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-29 22:04:13,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:13,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1607164823, now seen corresponding path program 2 times [2023-08-29 22:04:13,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:13,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78922437] [2023-08-29 22:04:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:13,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:04:13,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:13,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78922437] [2023-08-29 22:04:13,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78922437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:13,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:13,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:04:13,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89701932] [2023-08-29 22:04:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:13,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:04:13,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:04:13,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:04:14,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 567 [2023-08-29 22:04:14,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 32 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 242.57142857142858) internal successors, (1698), 7 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:14,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:14,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 567 [2023-08-29 22:04:14,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:14,193 INFO L130 PetriNetUnfolder]: 30/122 cut-off events. [2023-08-29 22:04:14,194 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2023-08-29 22:04:14,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 122 events. 30/122 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 359 event pairs, 23 based on Foata normal form. 1/122 useless extension candidates. Maximal degree in co-relation 332. Up to 70 conditions per place. [2023-08-29 22:04:14,194 INFO L137 encePairwiseOnDemand]: 560/567 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2023-08-29 22:04:14,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 36 transitions, 220 flow [2023-08-29 22:04:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:04:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:04:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1704 transitions. [2023-08-29 22:04:14,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293272864701436 [2023-08-29 22:04:14,197 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1704 transitions. [2023-08-29 22:04:14,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1704 transitions. [2023-08-29 22:04:14,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:14,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1704 transitions. [2023-08-29 22:04:14,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 243.42857142857142) internal successors, (1704), 7 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:14,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:14,201 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 567.0) internal successors, (4536), 8 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:14,201 INFO L175 Difference]: Start difference. First operand has 56 places, 32 transitions, 152 flow. Second operand 7 states and 1704 transitions. [2023-08-29 22:04:14,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 36 transitions, 220 flow [2023-08-29 22:04:14,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 36 transitions, 183 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-08-29 22:04:14,202 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2023-08-29 22:04:14,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2023-08-29 22:04:14,202 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -54 predicate places. [2023-08-29 22:04:14,203 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2023-08-29 22:04:14,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 242.57142857142858) internal successors, (1698), 7 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (44 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (43 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-08-29 22:04:14,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2023-08-29 22:04:14,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-08-29 22:04:14,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-08-29 22:04:14,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 49 remaining) [2023-08-29 22:04:14,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-08-29 22:04:14,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-08-29 22:04:14,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-08-29 22:04:14,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-08-29 22:04:14,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-08-29 22:04:14,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-08-29 22:04:14,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-08-29 22:04:14,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-08-29 22:04:14,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (21 of 49 remaining) [2023-08-29 22:04:14,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-08-29 22:04:14,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-08-29 22:04:14,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 49 remaining) [2023-08-29 22:04:14,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 49 remaining) [2023-08-29 22:04:14,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-08-29 22:04:14,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (14 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 49 remaining) [2023-08-29 22:04:14,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-08-29 22:04:14,207 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-08-29 22:04:14,207 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 49 remaining) [2023-08-29 22:04:14,207 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 49 remaining) [2023-08-29 22:04:14,207 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-08-29 22:04:14,207 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 49 remaining) [2023-08-29 22:04:14,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 22:04:14,207 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:14,208 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 22:04:14,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:04:14,252 INFO L130 PetriNetUnfolder]: 72/501 cut-off events. [2023-08-29 22:04:14,252 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:04:14,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 72/501 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2217 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 318. Up to 12 conditions per place. [2023-08-29 22:04:14,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 298 transitions, 614 flow [2023-08-29 22:04:14,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 260 places, 296 transitions, 610 flow [2023-08-29 22:04:14,256 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:04:14,256 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 296 transitions, 610 flow [2023-08-29 22:04:14,256 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 296 transitions, 610 flow [2023-08-29 22:04:14,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 296 transitions, 610 flow [2023-08-29 22:04:14,285 INFO L130 PetriNetUnfolder]: 71/499 cut-off events. [2023-08-29 22:04:14,286 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:04:14,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 499 events. 71/499 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2231 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2023-08-29 22:04:14,293 INFO L119 LiptonReduction]: Number of co-enabled transitions 35376 [2023-08-29 22:04:19,595 INFO L134 LiptonReduction]: Checked pairs total: 89368 [2023-08-29 22:04:19,595 INFO L136 LiptonReduction]: Total number of compositions: 263 [2023-08-29 22:04:19,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 22:04:19,596 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5b3ac1e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:04:19,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 22:04:19,603 INFO L130 PetriNetUnfolder]: 37/152 cut-off events. [2023-08-29 22:04:19,603 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:04:19,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:19,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 22:04:19,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:04:19,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash -423117587, now seen corresponding path program 1 times [2023-08-29 22:04:19,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:19,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131453477] [2023-08-29 22:04:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:19,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:04:19,615 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 22:04:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:04:19,625 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 22:04:19,625 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 22:04:19,625 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 22:04:19,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 22:04:19,625 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 22:04:19,625 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 22:04:19,626 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 22:04:19,626 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 22:04:19,641 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:04:19,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 367 transitions, 764 flow [2023-08-29 22:04:19,694 INFO L130 PetriNetUnfolder]: 106/727 cut-off events. [2023-08-29 22:04:19,695 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 22:04:19,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 727 events. 106/727 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3476 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-29 22:04:19,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 367 transitions, 764 flow [2023-08-29 22:04:19,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 319 places, 367 transitions, 764 flow [2023-08-29 22:04:19,709 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:04:19,709 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 319 places, 367 transitions, 764 flow [2023-08-29 22:04:19,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 319 places, 367 transitions, 764 flow [2023-08-29 22:04:19,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 367 transitions, 764 flow [2023-08-29 22:04:19,767 INFO L130 PetriNetUnfolder]: 106/727 cut-off events. [2023-08-29 22:04:19,767 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 22:04:19,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 727 events. 106/727 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3476 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-29 22:04:19,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 67134 [2023-08-29 22:04:26,664 INFO L134 LiptonReduction]: Checked pairs total: 198107 [2023-08-29 22:04:26,664 INFO L136 LiptonReduction]: Total number of compositions: 319 [2023-08-29 22:04:26,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:04:26,665 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5b3ac1e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:04:26,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-08-29 22:04:26,667 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 22:04:26,667 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:04:26,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:26,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:04:26,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:04:26,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash 87491, now seen corresponding path program 1 times [2023-08-29 22:04:26,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:26,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896865373] [2023-08-29 22:04:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:26,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896865373] [2023-08-29 22:04:26,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896865373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:26,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:26,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:04:26,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253750327] [2023-08-29 22:04:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:26,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:04:26,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:04:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:04:26,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 686 [2023-08-29 22:04:26,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:26,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:26,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 686 [2023-08-29 22:04:26,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:05:31,185 INFO L130 PetriNetUnfolder]: 855376/1218191 cut-off events. [2023-08-29 22:05:31,185 INFO L131 PetriNetUnfolder]: For 6279/6279 co-relation queries the response was YES. [2023-08-29 22:05:33,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346139 conditions, 1218191 events. 855376/1218191 cut-off events. For 6279/6279 co-relation queries the response was YES. Maximal size of possible extension queue 38335. Compared 11651287 event pairs, 795092 based on Foata normal form. 102856/908987 useless extension candidates. Maximal degree in co-relation 180047. Up to 1084415 conditions per place. [2023-08-29 22:05:38,120 INFO L137 encePairwiseOnDemand]: 632/686 looper letters, 156 selfloop transitions, 1 changer transitions 2/185 dead transitions. [2023-08-29 22:05:38,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 185 transitions, 718 flow [2023-08-29 22:05:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:05:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:05:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1162 transitions. [2023-08-29 22:05:38,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2023-08-29 22:05:38,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1162 transitions. [2023-08-29 22:05:38,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1162 transitions. [2023-08-29 22:05:38,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:05:38,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1162 transitions. [2023-08-29 22:05:38,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 387.3333333333333) internal successors, (1162), 3 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:05:38,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:05:38,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:05:38,125 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 380 flow. Second operand 3 states and 1162 transitions. [2023-08-29 22:05:38,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 185 transitions, 718 flow [2023-08-29 22:05:38,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 185 transitions, 718 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:05:38,130 INFO L231 Difference]: Finished difference. Result has 126 places, 123 transitions, 281 flow [2023-08-29 22:05:38,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=126, PETRI_TRANSITIONS=123} [2023-08-29 22:05:38,131 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -7 predicate places. [2023-08-29 22:05:38,131 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 123 transitions, 281 flow [2023-08-29 22:05:38,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:05:38,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:05:38,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:05:38,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 22:05:38,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-29 22:05:38,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:05:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash 88051, now seen corresponding path program 1 times [2023-08-29 22:05:38,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:05:38,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78060668] [2023-08-29 22:05:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:05:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:05:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:05:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:05:38,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:05:38,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78060668] [2023-08-29 22:05:38,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78060668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:05:38,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:05:38,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:05:38,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128533036] [2023-08-29 22:05:38,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:05:38,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:05:38,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:05:38,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:05:38,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:05:38,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 686 [2023-08-29 22:05:38,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 123 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:05:38,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:05:38,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 686 [2023-08-29 22:05:38,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand