./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_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_41-trylock_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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --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 21:45:27,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:45:27,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:45:27,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:45:27,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:45:27,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:45:27,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:45:27,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:45:27,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:45:27,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:45:27,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:45:27,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:45:27,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:45:27,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:45:27,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:45:27,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:45:27,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:45:27,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:45:27,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:45:27,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:45:27,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:45:27,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:45:27,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:45:27,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:45:27,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:45:27,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:45:27,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:45:27,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:45:27,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:45:27,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:45:27,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:45:27,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:45:27,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:45:27,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:45:27,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:45:27,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:45:27,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:45:27,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:45:27,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:45:27,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:45:27,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:45:27,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:45:27,571 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:45:27,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:45:27,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:45:27,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:45:27,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:45:27,574 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:45:27,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:45:27,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:45:27,575 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:45:27,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:45:27,576 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:45:27,577 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:45:27,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:45:27,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:45:27,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:45:27,577 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:45:27,578 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:45:27,578 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:45:27,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:45:27,578 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:45:27,578 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:45:27,579 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:45:27,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:45:27,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:45:27,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:45:27,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:45:27,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:45:27,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:45:27,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:45:27,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:45:27,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:45:27,581 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:45:27,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:45:27,581 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:45:27,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:45:27,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:45:27,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:45:27,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:45:27,925 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:45:27,926 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:45:27,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-29 21:45:29,111 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:45:29,409 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:45:29,410 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-29 21:45:29,431 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4520746/910592e2ccf34a4f8d77ad707c5f889b/FLAG1187d3c74 [2023-08-29 21:45:29,451 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4520746/910592e2ccf34a4f8d77ad707c5f889b [2023-08-29 21:45:29,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:45:29,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:45:29,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:45:29,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:45:29,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:45:29,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:45:29" (1/1) ... [2023-08-29 21:45:29,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3772f1b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:29, skipping insertion in model container [2023-08-29 21:45:29,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:45:29" (1/1) ... [2023-08-29 21:45:29,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:45:29,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:45:29,825 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_41-trylock_racefree.i[30176,30189] [2023-08-29 21:45:29,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:45:29,864 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:45:29,926 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_41-trylock_racefree.i[30176,30189] [2023-08-29 21:45:29,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:45:30,015 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:45:30,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30 WrapperNode [2023-08-29 21:45:30,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:45:30,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:45:30,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:45:30,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:45:30,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,076 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-08-29 21:45:30,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:45:30,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:45:30,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:45:30,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:45:30,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,121 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:45:30,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:45:30,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:45:30,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:45:30,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (1/1) ... [2023-08-29 21:45:30,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:45:30,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:45:30,166 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 21:45:30,197 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 21:45:30,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:45:30,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:45:30,208 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:45:30,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:45:30,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:45:30,208 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:45:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:45:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:45:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-29 21:45:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:45:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:45:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:45:30,211 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 21:45:30,393 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:45:30,405 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:45:30,697 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:45:30,703 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:45:30,704 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-29 21:45:30,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:45:30 BoogieIcfgContainer [2023-08-29 21:45:30,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:45:30,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:45:30,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:45:30,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:45:30,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:45:29" (1/3) ... [2023-08-29 21:45:30,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369e8949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:45:30, skipping insertion in model container [2023-08-29 21:45:30,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:45:30" (2/3) ... [2023-08-29 21:45:30,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369e8949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:45:30, skipping insertion in model container [2023-08-29 21:45:30,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:45:30" (3/3) ... [2023-08-29 21:45:30,716 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-08-29 21:45:30,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:45:30,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:45:30,732 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:45:30,804 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:45:30,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 111 transitions, 230 flow [2023-08-29 21:45:30,918 INFO L130 PetriNetUnfolder]: 21/155 cut-off events. [2023-08-29 21:45:30,919 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:45:30,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 21/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 414 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 77. Up to 6 conditions per place. [2023-08-29 21:45:30,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 111 transitions, 230 flow [2023-08-29 21:45:30,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 111 transitions, 230 flow [2023-08-29 21:45:30,932 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:45:30,940 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 111 transitions, 230 flow [2023-08-29 21:45:30,943 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 111 transitions, 230 flow [2023-08-29 21:45:30,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 111 transitions, 230 flow [2023-08-29 21:45:30,969 INFO L130 PetriNetUnfolder]: 21/155 cut-off events. [2023-08-29 21:45:30,969 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:45:30,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 21/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 414 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 77. Up to 6 conditions per place. [2023-08-29 21:45:30,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 2800 [2023-08-29 21:45:33,429 INFO L134 LiptonReduction]: Checked pairs total: 4682 [2023-08-29 21:45:33,430 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-29 21:45:33,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:45:33,461 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;@7e7cb339, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:45:33,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:45:33,463 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-29 21:45:33,464 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:45:33,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:33,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:45:33,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:33,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 13818, now seen corresponding path program 1 times [2023-08-29 21:45:33,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:33,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551767520] [2023-08-29 21:45:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:33,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:33,749 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 21:45:33,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:33,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551767520] [2023-08-29 21:45:33,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551767520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:33,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:33,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:45:33,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701028367] [2023-08-29 21:45:33,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:33,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:45:33,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:45:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:45:33,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-29 21:45:33,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 21:45:33,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:33,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-29 21:45:33,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:33,962 INFO L130 PetriNetUnfolder]: 137/303 cut-off events. [2023-08-29 21:45:33,962 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:45:33,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 303 events. 137/303 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1128 event pairs, 105 based on Foata normal form. 17/234 useless extension candidates. Maximal degree in co-relation 579. Up to 289 conditions per place. [2023-08-29 21:45:33,965 INFO L137 encePairwiseOnDemand]: 190/202 looper letters, 35 selfloop transitions, 2 changer transitions 3/41 dead transitions. [2023-08-29 21:45:33,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 168 flow [2023-08-29 21:45:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-29 21:45:33,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412541254125413 [2023-08-29 21:45:33,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-29 21:45:33,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-29 21:45:33,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:33,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-29 21:45:33,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 21:45:33,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 21:45:33,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 21:45:33,997 INFO L175 Difference]: Start difference. First operand has 32 places, 39 transitions, 86 flow. Second operand 3 states and 328 transitions. [2023-08-29 21:45:33,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 168 flow [2023-08-29 21:45:33,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:45:34,001 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 74 flow [2023-08-29 21:45:34,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=3, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-29 21:45:34,005 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-29 21:45:34,005 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 74 flow [2023-08-29 21:45:34,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 21:45:34,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:34,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:45:34,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:45:34,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:34,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:34,007 INFO L85 PathProgramCache]: Analyzing trace with hash 13817, now seen corresponding path program 1 times [2023-08-29 21:45:34,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:34,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430217499] [2023-08-29 21:45:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:34,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:34,052 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 21:45:34,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:34,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430217499] [2023-08-29 21:45:34,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430217499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:34,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:34,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:45:34,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832440324] [2023-08-29 21:45:34,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:34,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:45:34,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:34,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:45:34,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:45:34,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 202 [2023-08-29 21:45:34,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 21:45:34,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:34,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 202 [2023-08-29 21:45:34,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:34,152 INFO L130 PetriNetUnfolder]: 113/247 cut-off events. [2023-08-29 21:45:34,152 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 21:45:34,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 247 events. 113/247 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 855 event pairs, 96 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 513. Up to 228 conditions per place. [2023-08-29 21:45:34,154 INFO L137 encePairwiseOnDemand]: 198/202 looper letters, 32 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-29 21:45:34,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 154 flow [2023-08-29 21:45:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-29 21:45:34,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49504950495049505 [2023-08-29 21:45:34,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-29 21:45:34,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-29 21:45:34,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:34,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-29 21:45:34,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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 21:45:34,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 21:45:34,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 21:45:34,161 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 74 flow. Second operand 3 states and 300 transitions. [2023-08-29 21:45:34,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 154 flow [2023-08-29 21:45:34,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:45:34,167 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 68 flow [2023-08-29 21:45:34,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-29 21:45:34,167 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2023-08-29 21:45:34,168 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 68 flow [2023-08-29 21:45:34,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 21:45:34,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:34,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:45:34,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:45:34,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:34,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:34,169 INFO L85 PathProgramCache]: Analyzing trace with hash 411902882, now seen corresponding path program 1 times [2023-08-29 21:45:34,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:34,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779693775] [2023-08-29 21:45:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:34,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:34,399 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 21:45:34,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:34,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779693775] [2023-08-29 21:45:34,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779693775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:45:34,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334913702] [2023-08-29 21:45:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:34,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:45:34,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:45:34,403 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 21:45:34,404 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 21:45:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:34,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:45:34,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:45:34,522 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:45:34,609 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 21:45:34,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:45:34,673 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 21:45:34,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334913702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:45:34,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:45:34,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:45:34,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047780118] [2023-08-29 21:45:34,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:45:34,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:45:34,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:34,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:45:34,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:45:34,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 202 [2023-08-29 21:45:34,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 68 flow. Second operand has 8 states, 8 states have (on average 88.875) internal successors, (711), 8 states have internal predecessors, (711), 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 21:45:34,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:34,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 202 [2023-08-29 21:45:34,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:34,899 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-29 21:45:34,899 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:45:34,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 46 events. 16/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 99. Up to 34 conditions per place. [2023-08-29 21:45:34,899 INFO L137 encePairwiseOnDemand]: 198/202 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-29 21:45:34,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 92 flow [2023-08-29 21:45:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:45:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:45:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2023-08-29 21:45:34,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591584158415842 [2023-08-29 21:45:34,903 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2023-08-29 21:45:34,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2023-08-29 21:45:34,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:34,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2023-08-29 21:45:34,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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 21:45:34,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 21:45:34,910 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 21:45:34,910 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 68 flow. Second operand 4 states and 371 transitions. [2023-08-29 21:45:34,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 92 flow [2023-08-29 21:45:34,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:45:34,911 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-29 21:45:34,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-29 21:45:34,912 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -13 predicate places. [2023-08-29 21:45:34,912 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-29 21:45:34,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.875) internal successors, (711), 8 states have internal predecessors, (711), 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 21:45:34,917 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:45:34,917 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:45:34,917 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:45:34,917 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:45:34,918 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:45:34,918 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:45:34,929 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 21:45:35,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:45:35,126 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:45:35,128 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:45:35,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 111 transitions, 230 flow [2023-08-29 21:45:35,154 INFO L130 PetriNetUnfolder]: 21/155 cut-off events. [2023-08-29 21:45:35,154 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:45:35,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 21/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 414 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 77. Up to 6 conditions per place. [2023-08-29 21:45:35,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 111 transitions, 230 flow [2023-08-29 21:45:35,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 106 transitions, 217 flow [2023-08-29 21:45:35,157 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:45:35,158 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 106 transitions, 217 flow [2023-08-29 21:45:35,159 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 106 transitions, 217 flow [2023-08-29 21:45:35,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 106 transitions, 217 flow [2023-08-29 21:45:35,176 INFO L130 PetriNetUnfolder]: 20/150 cut-off events. [2023-08-29 21:45:35,177 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:45:35,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 150 events. 20/150 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 400 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 77. Up to 6 conditions per place. [2023-08-29 21:45:35,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 2800 [2023-08-29 21:45:37,172 INFO L134 LiptonReduction]: Checked pairs total: 4442 [2023-08-29 21:45:37,173 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-29 21:45:37,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:45:37,176 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;@7e7cb339, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:45:37,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:45:37,179 INFO L130 PetriNetUnfolder]: 5/34 cut-off events. [2023-08-29 21:45:37,180 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:45:37,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:37,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:45:37,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:45:37,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:37,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1869263530, now seen corresponding path program 1 times [2023-08-29 21:45:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:37,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673373074] [2023-08-29 21:45:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:37,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:45:37,195 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:45:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:45:37,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:45:37,216 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:45:37,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:45:37,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:45:37,217 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:45:37,218 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:45:37,218 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:45:37,218 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:45:37,233 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:45:37,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:37,261 INFO L130 PetriNetUnfolder]: 37/258 cut-off events. [2023-08-29 21:45:37,261 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:45:37,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 258 events. 37/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 805 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 157. Up to 9 conditions per place. [2023-08-29 21:45:37,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:37,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:37,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:45:37,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:37,265 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:37,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:37,285 INFO L130 PetriNetUnfolder]: 37/258 cut-off events. [2023-08-29 21:45:37,285 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:45:37,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 258 events. 37/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 805 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 157. Up to 9 conditions per place. [2023-08-29 21:45:37,291 INFO L119 LiptonReduction]: Number of co-enabled transitions 7784 [2023-08-29 21:45:39,416 INFO L134 LiptonReduction]: Checked pairs total: 18182 [2023-08-29 21:45:39,417 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-29 21:45:39,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:45:39,420 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;@7e7cb339, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:45:39,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:45:39,422 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-29 21:45:39,422 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:45:39,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:39,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:45:39,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:39,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:39,423 INFO L85 PathProgramCache]: Analyzing trace with hash 25275, now seen corresponding path program 1 times [2023-08-29 21:45:39,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:39,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224160134] [2023-08-29 21:45:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:39,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:39,493 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 21:45:39,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:39,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224160134] [2023-08-29 21:45:39,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224160134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:39,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:39,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:45:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356269977] [2023-08-29 21:45:39,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:39,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:45:39,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:45:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:45:39,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 242 [2023-08-29 21:45:39,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 64 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 21:45:39,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:39,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 242 [2023-08-29 21:45:39,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:39,944 INFO L130 PetriNetUnfolder]: 2359/4103 cut-off events. [2023-08-29 21:45:39,946 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-29 21:45:39,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7968 conditions, 4103 events. 2359/4103 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 25471 event pairs, 1080 based on Foata normal form. 628/3937 useless extension candidates. Maximal degree in co-relation 928. Up to 3790 conditions per place. [2023-08-29 21:45:39,966 INFO L137 encePairwiseOnDemand]: 223/242 looper letters, 45 selfloop transitions, 2 changer transitions 2/58 dead transitions. [2023-08-29 21:45:39,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 230 flow [2023-08-29 21:45:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-08-29 21:45:39,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5647382920110193 [2023-08-29 21:45:39,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-08-29 21:45:39,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-08-29 21:45:39,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:39,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-08-29 21:45:39,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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 21:45:39,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 21:45:39,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 21:45:39,978 INFO L175 Difference]: Start difference. First operand has 51 places, 64 transitions, 146 flow. Second operand 3 states and 410 transitions. [2023-08-29 21:45:39,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 230 flow [2023-08-29 21:45:39,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:45:39,982 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 120 flow [2023-08-29 21:45:39,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-08-29 21:45:39,986 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-29 21:45:39,987 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 120 flow [2023-08-29 21:45:39,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 21:45:39,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:39,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:45:39,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:45:39,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:39,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 25274, now seen corresponding path program 1 times [2023-08-29 21:45:39,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:39,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651511075] [2023-08-29 21:45:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:39,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:40,039 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 21:45:40,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:40,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651511075] [2023-08-29 21:45:40,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651511075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:40,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:40,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:45:40,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164183688] [2023-08-29 21:45:40,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:40,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:45:40,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:40,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:45:40,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:45:40,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 242 [2023-08-29 21:45:40,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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 21:45:40,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:40,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 242 [2023-08-29 21:45:40,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:40,354 INFO L130 PetriNetUnfolder]: 1941/3295 cut-off events. [2023-08-29 21:45:40,355 INFO L131 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2023-08-29 21:45:40,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6716 conditions, 3295 events. 1941/3295 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 19175 event pairs, 1710 based on Foata normal form. 0/2843 useless extension candidates. Maximal degree in co-relation 6650. Up to 2889 conditions per place. [2023-08-29 21:45:40,403 INFO L137 encePairwiseOnDemand]: 238/242 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-29 21:45:40,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 248 flow [2023-08-29 21:45:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-29 21:45:40,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261707988980716 [2023-08-29 21:45:40,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-29 21:45:40,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-29 21:45:40,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:40,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-29 21:45:40,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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 21:45:40,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 21:45:40,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 21:45:40,413 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 120 flow. Second operand 3 states and 382 transitions. [2023-08-29 21:45:40,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 248 flow [2023-08-29 21:45:40,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:45:40,418 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2023-08-29 21:45:40,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-29 21:45:40,420 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-08-29 21:45:40,420 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2023-08-29 21:45:40,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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 21:45:40,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:40,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:45:40,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:45:40,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:40,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1885438559, now seen corresponding path program 1 times [2023-08-29 21:45:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:40,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510811249] [2023-08-29 21:45:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:40,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:40,543 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 21:45:40,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510811249] [2023-08-29 21:45:40,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510811249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:45:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780884184] [2023-08-29 21:45:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:40,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:45:40,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:45:40,549 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 21:45:40,557 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 21:45:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:40,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:45:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:45:40,620 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:45:40,670 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 21:45:40,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:45:40,713 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 21:45:40,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780884184] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:45:40,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:45:40,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:45:40,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673218581] [2023-08-29 21:45:40,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:45:40,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:45:40,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:45:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:45:40,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 242 [2023-08-29 21:45:40,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 8 states, 8 states have (on average 110.875) internal successors, (887), 8 states have internal predecessors, (887), 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 21:45:40,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:40,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 242 [2023-08-29 21:45:40,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:40,971 INFO L130 PetriNetUnfolder]: 331/610 cut-off events. [2023-08-29 21:45:40,972 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2023-08-29 21:45:40,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 610 events. 331/610 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2831 event pairs, 0 based on Foata normal form. 80/689 useless extension candidates. Maximal degree in co-relation 1279. Up to 398 conditions per place. [2023-08-29 21:45:40,974 INFO L137 encePairwiseOnDemand]: 238/242 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2023-08-29 21:45:40,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 211 flow [2023-08-29 21:45:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:45:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:45:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-29 21:45:40,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-08-29 21:45:40,976 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-29 21:45:40,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-29 21:45:40,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:40,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-29 21:45:40,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 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 21:45:40,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 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 21:45:40,981 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 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 21:45:40,981 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 5 states and 594 transitions. [2023-08-29 21:45:40,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 211 flow [2023-08-29 21:45:40,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:45:40,982 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-29 21:45:40,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-29 21:45:40,983 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -12 predicate places. [2023-08-29 21:45:40,983 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-29 21:45:40,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 110.875) internal successors, (887), 8 states have internal predecessors, (887), 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 21:45:40,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:45:40,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:45:40,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:45:40,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:45:40,985 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:45:40,985 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:45:40,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:45:41,190 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,SelfDestructingSolverStorable6 [2023-08-29 21:45:41,190 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:45:41,191 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:45:41,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:41,218 INFO L130 PetriNetUnfolder]: 37/258 cut-off events. [2023-08-29 21:45:41,218 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:45:41,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 258 events. 37/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 805 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 157. Up to 9 conditions per place. [2023-08-29 21:45:41,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:41,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:41,221 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:45:41,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:41,221 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:41,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 141 transitions, 300 flow [2023-08-29 21:45:41,240 INFO L130 PetriNetUnfolder]: 37/258 cut-off events. [2023-08-29 21:45:41,240 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:45:41,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 258 events. 37/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 805 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 157. Up to 9 conditions per place. [2023-08-29 21:45:41,246 INFO L119 LiptonReduction]: Number of co-enabled transitions 7784 [2023-08-29 21:45:43,259 INFO L134 LiptonReduction]: Checked pairs total: 18182 [2023-08-29 21:45:43,259 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-29 21:45:43,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:45:43,261 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;@7e7cb339, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:45:43,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:45:43,266 INFO L130 PetriNetUnfolder]: 15/75 cut-off events. [2023-08-29 21:45:43,267 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:45:43,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:43,267 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:45:43,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:45:43,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash 998363578, now seen corresponding path program 1 times [2023-08-29 21:45:43,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:43,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876127605] [2023-08-29 21:45:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:43,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:45:43,280 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:45:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:45:43,292 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:45:43,293 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:45:43,293 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:45:43,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:45:43,293 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:45:43,294 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:45:43,294 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:45:43,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:45:43,310 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:45:43,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 171 transitions, 372 flow [2023-08-29 21:45:43,342 INFO L130 PetriNetUnfolder]: 58/402 cut-off events. [2023-08-29 21:45:43,343 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:45:43,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 402 events. 58/402 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1402 event pairs, 1 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 266. Up to 16 conditions per place. [2023-08-29 21:45:43,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 171 transitions, 372 flow [2023-08-29 21:45:43,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 171 transitions, 372 flow [2023-08-29 21:45:43,349 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:45:43,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 171 transitions, 372 flow [2023-08-29 21:45:43,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 171 transitions, 372 flow [2023-08-29 21:45:43,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 171 transitions, 372 flow [2023-08-29 21:45:43,379 INFO L130 PetriNetUnfolder]: 58/402 cut-off events. [2023-08-29 21:45:43,379 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:45:43,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 402 events. 58/402 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1402 event pairs, 1 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 266. Up to 16 conditions per place. [2023-08-29 21:45:43,394 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-29 21:45:45,651 INFO L134 LiptonReduction]: Checked pairs total: 35730 [2023-08-29 21:45:45,651 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-29 21:45:45,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:45:45,653 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;@7e7cb339, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:45:45,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:45:45,655 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-29 21:45:45,655 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:45:45,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:45,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:45:45,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:45,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash 38647, now seen corresponding path program 1 times [2023-08-29 21:45:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:45,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092288654] [2023-08-29 21:45:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:45,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:45,675 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 21:45:45,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:45,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092288654] [2023-08-29 21:45:45,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092288654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:45,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:45,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:45:45,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565160424] [2023-08-29 21:45:45,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:45,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:45:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:45:45,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:45:45,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 287 [2023-08-29 21:45:45,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 83 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 21:45:45,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:45,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 287 [2023-08-29 21:45:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:48,924 INFO L130 PetriNetUnfolder]: 26456/39784 cut-off events. [2023-08-29 21:45:48,925 INFO L131 PetriNetUnfolder]: For 889/889 co-relation queries the response was YES. [2023-08-29 21:45:48,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77733 conditions, 39784 events. 26456/39784 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 1145. Compared 287873 event pairs, 21927 based on Foata normal form. 7208/41038 useless extension candidates. Maximal degree in co-relation 17695. Up to 31908 conditions per place. [2023-08-29 21:45:49,166 INFO L137 encePairwiseOnDemand]: 261/287 looper letters, 64 selfloop transitions, 2 changer transitions 2/81 dead transitions. [2023-08-29 21:45:49,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 326 flow [2023-08-29 21:45:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-29 21:45:49,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2023-08-29 21:45:49,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-29 21:45:49,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-29 21:45:49,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:49,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-29 21:45:49,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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 21:45:49,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 21:45:49,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 21:45:49,173 INFO L175 Difference]: Start difference. First operand has 65 places, 83 transitions, 196 flow. Second operand 3 states and 504 transitions. [2023-08-29 21:45:49,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 326 flow [2023-08-29 21:45:49,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:45:49,178 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 142 flow [2023-08-29 21:45:49,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-29 21:45:49,179 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-08-29 21:45:49,179 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 142 flow [2023-08-29 21:45:49,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 21:45:49,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:49,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:45:49,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:45:49,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:49,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash 38648, now seen corresponding path program 1 times [2023-08-29 21:45:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:49,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783889428] [2023-08-29 21:45:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:49,227 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 21:45:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783889428] [2023-08-29 21:45:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783889428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:49,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:49,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:45:49,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184313813] [2023-08-29 21:45:49,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:49,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:45:49,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:45:49,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:45:49,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 287 [2023-08-29 21:45:49,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 21:45:49,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:49,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 287 [2023-08-29 21:45:49,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:51,284 INFO L130 PetriNetUnfolder]: 24574/36793 cut-off events. [2023-08-29 21:45:51,284 INFO L131 PetriNetUnfolder]: For 1444/1444 co-relation queries the response was YES. [2023-08-29 21:45:51,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72792 conditions, 36793 events. 24574/36793 cut-off events. For 1444/1444 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 259123 event pairs, 22734 based on Foata normal form. 0/32435 useless extension candidates. Maximal degree in co-relation 66574. Up to 34569 conditions per place. [2023-08-29 21:45:51,466 INFO L137 encePairwiseOnDemand]: 283/287 looper letters, 52 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-29 21:45:51,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 270 flow [2023-08-29 21:45:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-29 21:45:51,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354239256678281 [2023-08-29 21:45:51,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-29 21:45:51,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-29 21:45:51,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:51,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-29 21:45:51,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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 21:45:51,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 21:45:51,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 21:45:51,473 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 142 flow. Second operand 3 states and 461 transitions. [2023-08-29 21:45:51,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 270 flow [2023-08-29 21:45:51,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 67 transitions, 264 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:45:51,536 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 150 flow [2023-08-29 21:45:51,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-08-29 21:45:51,538 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-08-29 21:45:51,538 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 150 flow [2023-08-29 21:45:51,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 21:45:51,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:51,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:45:51,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:45:51,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:51,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1363100959, now seen corresponding path program 1 times [2023-08-29 21:45:51,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:51,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371048407] [2023-08-29 21:45:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:51,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:51,621 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 21:45:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:51,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371048407] [2023-08-29 21:45:51,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371048407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:45:51,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655799557] [2023-08-29 21:45:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:51,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:45:51,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:45:51,624 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 21:45:51,627 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 21:45:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:51,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:45:51,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:45:51,711 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:45:51,745 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 21:45:51,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:45:51,784 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 21:45:51,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655799557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:45:51,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:45:51,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:45:51,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777127215] [2023-08-29 21:45:51,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:45:51,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:45:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:45:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:45:51,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 287 [2023-08-29 21:45:51,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 150 flow. Second operand has 7 states, 7 states have (on average 133.71428571428572) internal successors, (936), 7 states have internal predecessors, (936), 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 21:45:51,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:51,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 287 [2023-08-29 21:45:51,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:53,766 INFO L130 PetriNetUnfolder]: 23378/33559 cut-off events. [2023-08-29 21:45:53,767 INFO L131 PetriNetUnfolder]: For 1355/1355 co-relation queries the response was YES. [2023-08-29 21:45:53,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68424 conditions, 33559 events. 23378/33559 cut-off events. For 1355/1355 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 223962 event pairs, 1197 based on Foata normal form. 9/30433 useless extension candidates. Maximal degree in co-relation 60802. Up to 25741 conditions per place. [2023-08-29 21:45:53,975 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 123 selfloop transitions, 6 changer transitions 1/143 dead transitions. [2023-08-29 21:45:53,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 143 transitions, 588 flow [2023-08-29 21:45:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:45:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:45:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 926 transitions. [2023-08-29 21:45:53,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537746806039489 [2023-08-29 21:45:53,980 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 926 transitions. [2023-08-29 21:45:53,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 926 transitions. [2023-08-29 21:45:53,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:53,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 926 transitions. [2023-08-29 21:45:53,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.33333333333334) internal successors, (926), 6 states have internal predecessors, (926), 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 21:45:53,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 287.0) internal successors, (2009), 7 states have internal predecessors, (2009), 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 21:45:53,986 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 287.0) internal successors, (2009), 7 states have internal predecessors, (2009), 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 21:45:53,986 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 150 flow. Second operand 6 states and 926 transitions. [2023-08-29 21:45:53,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 143 transitions, 588 flow [2023-08-29 21:45:53,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 143 transitions, 586 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:45:53,991 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 166 flow [2023-08-29 21:45:53,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-29 21:45:53,992 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-29 21:45:53,992 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 166 flow [2023-08-29 21:45:53,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.71428571428572) internal successors, (936), 7 states have internal predecessors, (936), 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 21:45:53,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:53,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:45:54,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 21:45:54,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:45:54,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:54,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1400980053, now seen corresponding path program 1 times [2023-08-29 21:45:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:54,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584867881] [2023-08-29 21:45:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:54,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:54,271 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 21:45:54,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:54,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584867881] [2023-08-29 21:45:54,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584867881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:54,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:54,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:45:54,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571324218] [2023-08-29 21:45:54,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:54,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:45:54,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:54,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:45:54,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:45:54,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 287 [2023-08-29 21:45:54,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 21:45:54,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:54,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 287 [2023-08-29 21:45:54,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:56,790 INFO L130 PetriNetUnfolder]: 29490/43412 cut-off events. [2023-08-29 21:45:56,790 INFO L131 PetriNetUnfolder]: For 6638/6638 co-relation queries the response was YES. [2023-08-29 21:45:56,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89825 conditions, 43412 events. 29490/43412 cut-off events. For 6638/6638 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 294270 event pairs, 12139 based on Foata normal form. 0/40687 useless extension candidates. Maximal degree in co-relation 47822. Up to 40122 conditions per place. [2023-08-29 21:45:56,994 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 70 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-29 21:45:56,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 399 flow [2023-08-29 21:45:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-29 21:45:56,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2023-08-29 21:45:56,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-29 21:45:56,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-29 21:45:56,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:56,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-29 21:45:56,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 21:45:57,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 21:45:57,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 21:45:57,002 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 166 flow. Second operand 3 states and 468 transitions. [2023-08-29 21:45:57,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 399 flow [2023-08-29 21:45:57,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 387 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:45:57,010 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 185 flow [2023-08-29 21:45:57,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-29 21:45:57,012 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-29 21:45:57,012 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 185 flow [2023-08-29 21:45:57,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 21:45:57,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:57,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:45:57,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:45:57,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:57,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:57,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1895451796, now seen corresponding path program 1 times [2023-08-29 21:45:57,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:57,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646954112] [2023-08-29 21:45:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:57,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:57,047 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 21:45:57,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:57,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646954112] [2023-08-29 21:45:57,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646954112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:57,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:57,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:45:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837199183] [2023-08-29 21:45:57,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:57,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:45:57,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:45:57,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:45:57,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 287 [2023-08-29 21:45:57,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 21:45:57,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:57,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 287 [2023-08-29 21:45:57,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:59,259 INFO L130 PetriNetUnfolder]: 23443/34727 cut-off events. [2023-08-29 21:45:59,259 INFO L131 PetriNetUnfolder]: For 7259/7316 co-relation queries the response was YES. [2023-08-29 21:45:59,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74621 conditions, 34727 events. 23443/34727 cut-off events. For 7259/7316 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 237748 event pairs, 15854 based on Foata normal form. 720/33276 useless extension candidates. Maximal degree in co-relation 35382. Up to 24851 conditions per place. [2023-08-29 21:45:59,423 INFO L137 encePairwiseOnDemand]: 284/287 looper letters, 76 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-29 21:45:59,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 419 flow [2023-08-29 21:45:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-29 21:45:59,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2023-08-29 21:45:59,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-29 21:45:59,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-29 21:45:59,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:59,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-29 21:45:59,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 21:45:59,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 21:45:59,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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 21:45:59,429 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 185 flow. Second operand 3 states and 480 transitions. [2023-08-29 21:45:59,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 419 flow [2023-08-29 21:45:59,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:45:59,437 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 195 flow [2023-08-29 21:45:59,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-08-29 21:45:59,438 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-29 21:45:59,438 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 195 flow [2023-08-29 21:45:59,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 21:45:59,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:59,438 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:45:59,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:45:59,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:59,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1895451858, now seen corresponding path program 1 times [2023-08-29 21:45:59,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:59,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510374808] [2023-08-29 21:45:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:59,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:45:59,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:59,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510374808] [2023-08-29 21:45:59,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510374808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:45:59,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608084465] [2023-08-29 21:45:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:59,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:45:59,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:45:59,554 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 21:45:59,583 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 21:45:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:45:59,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:45:59,668 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 21:45:59,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:45:59,705 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 21:45:59,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608084465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:45:59,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:45:59,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 21:45:59,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125321127] [2023-08-29 21:45:59,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:45:59,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:45:59,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:45:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:45:59,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 287 [2023-08-29 21:45:59,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 195 flow. Second operand has 12 states, 12 states have (on average 129.0) internal successors, (1548), 12 states have internal predecessors, (1548), 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 21:45:59,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:59,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 287 [2023-08-29 21:45:59,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:46:00,450 INFO L130 PetriNetUnfolder]: 4750/7566 cut-off events. [2023-08-29 21:46:00,451 INFO L131 PetriNetUnfolder]: For 3765/3765 co-relation queries the response was YES. [2023-08-29 21:46:00,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16625 conditions, 7566 events. 4750/7566 cut-off events. For 3765/3765 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 47954 event pairs, 460 based on Foata normal form. 720/8110 useless extension candidates. Maximal degree in co-relation 16615. Up to 4626 conditions per place. [2023-08-29 21:46:00,461 INFO L137 encePairwiseOnDemand]: 284/287 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-08-29 21:46:00,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 98 transitions, 425 flow [2023-08-29 21:46:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:46:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:46:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 837 transitions. [2023-08-29 21:46:00,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48606271777003485 [2023-08-29 21:46:00,465 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 837 transitions. [2023-08-29 21:46:00,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 837 transitions. [2023-08-29 21:46:00,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:46:00,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 837 transitions. [2023-08-29 21:46:00,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 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 21:46:00,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 287.0) internal successors, (2009), 7 states have internal predecessors, (2009), 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 21:46:00,470 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 287.0) internal successors, (2009), 7 states have internal predecessors, (2009), 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 21:46:00,470 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 195 flow. Second operand 6 states and 837 transitions. [2023-08-29 21:46:00,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 98 transitions, 425 flow [2023-08-29 21:46:00,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 417 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:46:00,479 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-08-29 21:46:00,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-08-29 21:46:00,480 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-08-29 21:46:00,480 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-08-29 21:46:00,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.0) internal successors, (1548), 12 states have internal predecessors, (1548), 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 21:46:00,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:46:00,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:46:00,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:46:00,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:46:00,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:46:00,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:46:00,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 21:46:00,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:46:00,689 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-29 21:46:00,689 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:46:00,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 171 transitions, 372 flow [2023-08-29 21:46:00,719 INFO L130 PetriNetUnfolder]: 58/402 cut-off events. [2023-08-29 21:46:00,719 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:46:00,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 402 events. 58/402 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1402 event pairs, 1 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 266. Up to 16 conditions per place. [2023-08-29 21:46:00,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 171 transitions, 372 flow [2023-08-29 21:46:00,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 171 transitions, 372 flow [2023-08-29 21:46:00,725 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:46:00,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 171 transitions, 372 flow [2023-08-29 21:46:00,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 171 transitions, 372 flow [2023-08-29 21:46:00,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 171 transitions, 372 flow [2023-08-29 21:46:00,753 INFO L130 PetriNetUnfolder]: 58/402 cut-off events. [2023-08-29 21:46:00,753 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:46:00,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 402 events. 58/402 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1402 event pairs, 1 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 266. Up to 16 conditions per place. [2023-08-29 21:46:00,765 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-29 21:46:02,924 INFO L134 LiptonReduction]: Checked pairs total: 35703 [2023-08-29 21:46:02,924 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-29 21:46:02,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:46:02,925 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;@7e7cb339, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:46:02,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:46:02,932 INFO L130 PetriNetUnfolder]: 23/112 cut-off events. [2023-08-29 21:46:02,932 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:46:02,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:46:02,932 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:46:02,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:46:02,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:46:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash 822860668, now seen corresponding path program 1 times [2023-08-29 21:46:02,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:46:02,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697642053] [2023-08-29 21:46:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:46:02,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:46:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:46:02,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:46:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:46:02,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:46:02,979 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:46:02,980 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:46:02,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:46:02,980 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:46:02,981 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:46:02,982 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:46:02,982 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:46:03,009 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:46:03,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 446 flow [2023-08-29 21:46:03,068 INFO L130 PetriNetUnfolder]: 91/630 cut-off events. [2023-08-29 21:46:03,069 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:46:03,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 630 events. 91/630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2593 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 422. Up to 32 conditions per place. [2023-08-29 21:46:03,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 446 flow [2023-08-29 21:46:03,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 201 transitions, 446 flow [2023-08-29 21:46:03,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:46:03,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 201 transitions, 446 flow [2023-08-29 21:46:03,083 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 201 transitions, 446 flow [2023-08-29 21:46:03,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 446 flow [2023-08-29 21:46:03,133 INFO L130 PetriNetUnfolder]: 91/630 cut-off events. [2023-08-29 21:46:03,134 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:46:03,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 630 events. 91/630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2593 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 422. Up to 32 conditions per place. [2023-08-29 21:46:03,153 INFO L119 LiptonReduction]: Number of co-enabled transitions 22512 [2023-08-29 21:46:05,503 INFO L134 LiptonReduction]: Checked pairs total: 61097 [2023-08-29 21:46:05,504 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-29 21:46:05,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:46:05,505 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;@7e7cb339, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:46:05,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:46:05,506 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-29 21:46:05,506 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:46:05,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:46:05,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:46:05,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:46:05,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:46:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash 54006, now seen corresponding path program 1 times [2023-08-29 21:46:05,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:46:05,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628848467] [2023-08-29 21:46:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:46:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:46:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:46:05,528 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 21:46:05,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:46:05,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628848467] [2023-08-29 21:46:05,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628848467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:46:05,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:46:05,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:46:05,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145847395] [2023-08-29 21:46:05,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:46:05,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:46:05,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:46:05,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:46:05,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:46:05,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 333 [2023-08-29 21:46:05,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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 21:46:05,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:46:05,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 333 [2023-08-29 21:46:05,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:46:39,046 INFO L130 PetriNetUnfolder]: 378028/512051 cut-off events. [2023-08-29 21:46:39,046 INFO L131 PetriNetUnfolder]: For 14823/14823 co-relation queries the response was YES. [2023-08-29 21:46:39,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011993 conditions, 512051 events. 378028/512051 cut-off events. For 14823/14823 co-relation queries the response was YES. Maximal size of possible extension queue 10347. Compared 3927002 event pairs, 313265 based on Foata normal form. 82977/537524 useless extension candidates. Maximal degree in co-relation 86886. Up to 416615 conditions per place. [2023-08-29 21:46:41,602 INFO L137 encePairwiseOnDemand]: 302/333 looper letters, 84 selfloop transitions, 2 changer transitions 2/103 dead transitions. [2023-08-29 21:46:41,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 424 flow [2023-08-29 21:46:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:46:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:46:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-08-29 21:46:41,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016016016016016 [2023-08-29 21:46:41,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-08-29 21:46:41,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-08-29 21:46:41,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:46:41,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-08-29 21:46:41,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 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 21:46:41,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 21:46:41,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 21:46:41,611 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 244 flow. Second operand 3 states and 601 transitions. [2023-08-29 21:46:41,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 424 flow [2023-08-29 21:46:41,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 103 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:46:41,620 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 180 flow [2023-08-29 21:46:41,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2023-08-29 21:46:41,621 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-29 21:46:41,621 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 180 flow [2023-08-29 21:46:41,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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 21:46:41,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:46:41,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:46:41,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:46:41,622 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:46:41,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:46:41,622 INFO L85 PathProgramCache]: Analyzing trace with hash 54007, now seen corresponding path program 1 times [2023-08-29 21:46:41,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:46:41,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121325045] [2023-08-29 21:46:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:46:41,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:46:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:46:41,662 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 21:46:41,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:46:41,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121325045] [2023-08-29 21:46:41,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121325045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:46:41,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:46:41,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:46:41,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194258486] [2023-08-29 21:46:41,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:46:41,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:46:41,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:46:41,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:46:41,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:46:41,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 333 [2023-08-29 21:46:41,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 21:46:41,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:46:41,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 333 [2023-08-29 21:46:41,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:47:10,666 INFO L130 PetriNetUnfolder]: 349426/475666 cut-off events. [2023-08-29 21:47:10,667 INFO L131 PetriNetUnfolder]: For 19948/19948 co-relation queries the response was YES. [2023-08-29 21:47:12,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946137 conditions, 475666 events. 349426/475666 cut-off events. For 19948/19948 co-relation queries the response was YES. Maximal size of possible extension queue 9704. Compared 3616695 event pairs, 252737 based on Foata normal form. 0/437103 useless extension candidates. Maximal degree in co-relation 860694. Up to 454196 conditions per place. [2023-08-29 21:47:14,236 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 63 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-29 21:47:14,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 330 flow [2023-08-29 21:47:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:47:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:47:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-29 21:47:14,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385385385385385 [2023-08-29 21:47:14,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-29 21:47:14,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-29 21:47:14,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:47:14,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-29 21:47:14,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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 21:47:14,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 21:47:14,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 21:47:14,270 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 180 flow. Second operand 3 states and 538 transitions. [2023-08-29 21:47:14,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 330 flow [2023-08-29 21:47:25,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 324 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:47:25,257 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 188 flow [2023-08-29 21:47:25,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2023-08-29 21:47:25,257 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2023-08-29 21:47:25,257 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 188 flow [2023-08-29 21:47:25,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 21:47:25,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:47:25,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:47:25,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:47:25,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:47:25,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:47:25,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1618213714, now seen corresponding path program 1 times [2023-08-29 21:47:25,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:47:25,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050136796] [2023-08-29 21:47:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:47:25,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:47:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:47:25,311 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 21:47:25,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:47:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050136796] [2023-08-29 21:47:25,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050136796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:47:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097333096] [2023-08-29 21:47:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:47:25,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:47:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:47:25,317 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 21:47:25,340 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 21:47:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:47:25,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:47:25,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:47:25,404 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:47:25,440 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 21:47:25,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:47:25,473 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 21:47:25,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097333096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:47:25,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:47:25,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:47:25,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499777715] [2023-08-29 21:47:25,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:47:25,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:47:25,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:47:25,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:47:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:47:25,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 333 [2023-08-29 21:47:25,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 188 flow. Second operand has 7 states, 7 states have (on average 155.71428571428572) internal successors, (1090), 7 states have internal predecessors, (1090), 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 21:47:25,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:47:25,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 333 [2023-08-29 21:47:25,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:47:51,829 INFO L130 PetriNetUnfolder]: 355087/470626 cut-off events. [2023-08-29 21:47:51,829 INFO L131 PetriNetUnfolder]: For 13930/13930 co-relation queries the response was YES. [2023-08-29 21:47:52,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958821 conditions, 470626 events. 355087/470626 cut-off events. For 13930/13930 co-relation queries the response was YES. Maximal size of possible extension queue 9301. Compared 3445112 event pairs, 6620 based on Foata normal form. 9/431709 useless extension candidates. Maximal degree in co-relation 117852. Up to 380764 conditions per place. [2023-08-29 21:47:54,585 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 160 selfloop transitions, 7 changer transitions 1/183 dead transitions. [2023-08-29 21:47:54,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 183 transitions, 771 flow [2023-08-29 21:47:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:47:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:47:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1096 transitions. [2023-08-29 21:47:54,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5485485485485485 [2023-08-29 21:47:54,588 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1096 transitions. [2023-08-29 21:47:54,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1096 transitions. [2023-08-29 21:47:54,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:47:54,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1096 transitions. [2023-08-29 21:47:54,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.66666666666666) internal successors, (1096), 6 states have internal predecessors, (1096), 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 21:47:54,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 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 21:47:54,593 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 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 21:47:54,594 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 188 flow. Second operand 6 states and 1096 transitions. [2023-08-29 21:47:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 183 transitions, 771 flow [2023-08-29 21:47:54,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 183 transitions, 769 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:47:54,598 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 236 flow [2023-08-29 21:47:54,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2023-08-29 21:47:54,599 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2023-08-29 21:47:54,599 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 236 flow [2023-08-29 21:47:54,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.71428571428572) internal successors, (1090), 7 states have internal predecessors, (1090), 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 21:47:54,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:47:54,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:47:54,608 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 21:47:54,804 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 21:47:54,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:47:54,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:47:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash 363023108, now seen corresponding path program 1 times [2023-08-29 21:47:54,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:47:54,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158272217] [2023-08-29 21:47:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:47:54,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:47:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:47:54,844 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 21:47:54,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:47:54,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158272217] [2023-08-29 21:47:54,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158272217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:47:54,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:47:54,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:47:54,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304723806] [2023-08-29 21:47:54,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:47:54,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:47:54,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:47:54,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:47:54,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:47:54,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 333 [2023-08-29 21:47:54,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 21:47:54,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:47:54,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 333 [2023-08-29 21:47:54,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:30,918 INFO L130 PetriNetUnfolder]: 375734/508893 cut-off events. [2023-08-29 21:48:30,918 INFO L131 PetriNetUnfolder]: For 156643/156643 co-relation queries the response was YES. [2023-08-29 21:48:32,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081683 conditions, 508893 events. 375734/508893 cut-off events. For 156643/156643 co-relation queries the response was YES. Maximal size of possible extension queue 9669. Compared 3807679 event pairs, 181356 based on Foata normal form. 0/482925 useless extension candidates. Maximal degree in co-relation 599077. Up to 484209 conditions per place. [2023-08-29 21:48:33,936 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 89 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2023-08-29 21:48:33,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 108 transitions, 557 flow [2023-08-29 21:48:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:48:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:48:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-08-29 21:48:33,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5445445445445446 [2023-08-29 21:48:33,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-08-29 21:48:33,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-08-29 21:48:33,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:33,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-08-29 21:48:33,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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 21:48:33,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 21:48:33,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 21:48:33,941 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 236 flow. Second operand 3 states and 544 transitions. [2023-08-29 21:48:33,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 108 transitions, 557 flow [2023-08-29 21:48:33,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 108 transitions, 547 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:48:33,983 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 263 flow [2023-08-29 21:48:33,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-08-29 21:48:33,984 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2023-08-29 21:48:33,984 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 263 flow [2023-08-29 21:48:33,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 21:48:33,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:48:33,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:48:33,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:48:33,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:48:33,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:48:33,984 INFO L85 PathProgramCache]: Analyzing trace with hash 94176733, now seen corresponding path program 1 times [2023-08-29 21:48:33,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:48:33,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820757401] [2023-08-29 21:48:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:48:33,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:48:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:48:34,010 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 21:48:34,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:48:34,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820757401] [2023-08-29 21:48:34,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820757401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:48:34,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:48:34,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:48:34,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067411465] [2023-08-29 21:48:34,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:48:34,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:48:34,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:48:34,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:48:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:48:34,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 333 [2023-08-29 21:48:34,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 21:48:34,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:48:34,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 333 [2023-08-29 21:48:34,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:49:05,265 INFO L130 PetriNetUnfolder]: 347223/470487 cut-off events. [2023-08-29 21:49:05,266 INFO L131 PetriNetUnfolder]: For 175858/175865 co-relation queries the response was YES. [2023-08-29 21:49:06,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040225 conditions, 470487 events. 347223/470487 cut-off events. For 175858/175865 co-relation queries the response was YES. Maximal size of possible extension queue 9179. Compared 3545541 event pairs, 244623 based on Foata normal form. 7332/454689 useless extension candidates. Maximal degree in co-relation 680132. Up to 343721 conditions per place. [2023-08-29 21:49:08,329 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 102 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-29 21:49:08,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 120 transitions, 578 flow [2023-08-29 21:49:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:49:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:49:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-08-29 21:49:08,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685685685685685 [2023-08-29 21:49:08,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-08-29 21:49:08,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-08-29 21:49:08,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:49:08,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-08-29 21:49:08,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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 21:49:08,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 21:49:08,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 21:49:08,335 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 263 flow. Second operand 3 states and 568 transitions. [2023-08-29 21:49:08,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 120 transitions, 578 flow [2023-08-29 21:49:08,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 120 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:49:08,447 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 274 flow [2023-08-29 21:49:08,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2023-08-29 21:49:08,448 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2023-08-29 21:49:08,448 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 274 flow [2023-08-29 21:49:08,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 21:49:08,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:49:08,448 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:49:08,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 21:49:08,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:49:08,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:49:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash 94176671, now seen corresponding path program 1 times [2023-08-29 21:49:08,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:49:08,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193462026] [2023-08-29 21:49:08,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:49:08,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:49:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:49:08,510 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 21:49:08,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:49:08,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193462026] [2023-08-29 21:49:08,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193462026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:49:08,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:49:08,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:49:08,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810312657] [2023-08-29 21:49:08,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:49:08,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:49:08,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:49:08,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:49:08,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:49:08,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 333 [2023-08-29 21:49:08,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 21:49:08,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:49:08,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 333 [2023-08-29 21:49:08,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:49:39,136 INFO L130 PetriNetUnfolder]: 322034/437933 cut-off events. [2023-08-29 21:49:39,136 INFO L131 PetriNetUnfolder]: For 200845/200852 co-relation queries the response was YES. [2023-08-29 21:49:40,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989443 conditions, 437933 events. 322034/437933 cut-off events. For 200845/200852 co-relation queries the response was YES. Maximal size of possible extension queue 8488. Compared 3289718 event pairs, 236162 based on Foata normal form. 0/422508 useless extension candidates. Maximal degree in co-relation 692258. Up to 331359 conditions per place. [2023-08-29 21:49:41,940 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 128 selfloop transitions, 6 changer transitions 0/150 dead transitions. [2023-08-29 21:49:41,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 150 transitions, 710 flow [2023-08-29 21:49:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:49:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:49:41,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-08-29 21:49:41,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2023-08-29 21:49:41,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-08-29 21:49:41,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-08-29 21:49:41,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:49:41,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-08-29 21:49:41,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 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 21:49:41,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 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 21:49:41,947 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 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 21:49:41,947 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 274 flow. Second operand 4 states and 744 transitions. [2023-08-29 21:49:41,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 150 transitions, 710 flow [2023-08-29 21:49:43,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 150 transitions, 708 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:49:43,511 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 288 flow [2023-08-29 21:49:43,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2023-08-29 21:49:43,512 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 12 predicate places. [2023-08-29 21:49:43,512 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 288 flow [2023-08-29 21:49:43,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 21:49:43,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:49:43,513 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:49:43,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 21:49:43,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:49:43,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:49:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1262993677, now seen corresponding path program 1 times [2023-08-29 21:49:43,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:49:43,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980896618] [2023-08-29 21:49:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:49:43,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:49:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:49:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:49:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:49:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980896618] [2023-08-29 21:49:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980896618] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:49:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119312989] [2023-08-29 21:49:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:49:43,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:49:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:49:43,641 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 21:49:43,666 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 21:49:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:49:43,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:49:43,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:49:43,739 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:49:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:49:43,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:49:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:49:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119312989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:49:44,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:49:44,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-29 21:49:44,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573014721] [2023-08-29 21:49:44,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:49:44,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 21:49:44,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:49:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 21:49:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-29 21:49:44,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 333 [2023-08-29 21:49:44,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 288 flow. Second operand has 17 states, 17 states have (on average 155.47058823529412) internal successors, (2643), 17 states have internal predecessors, (2643), 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 21:49:44,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:49:44,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 333 [2023-08-29 21:49:44,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:49:48,621 INFO L130 PetriNetUnfolder]: 45600/64816 cut-off events. [2023-08-29 21:49:48,621 INFO L131 PetriNetUnfolder]: For 113904/113904 co-relation queries the response was YES. [2023-08-29 21:49:48,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156813 conditions, 64816 events. 45600/64816 cut-off events. For 113904/113904 co-relation queries the response was YES. Maximal size of possible extension queue 1671. Compared 450898 event pairs, 1008 based on Foata normal form. 13758/78226 useless extension candidates. Maximal degree in co-relation 156799. Up to 29418 conditions per place. [2023-08-29 21:49:48,833 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 0 selfloop transitions, 0 changer transitions 145/145 dead transitions. [2023-08-29 21:49:48,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 145 transitions, 650 flow [2023-08-29 21:49:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:49:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:49:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1196 transitions. [2023-08-29 21:49:48,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130845130845131 [2023-08-29 21:49:48,836 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1196 transitions. [2023-08-29 21:49:48,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1196 transitions. [2023-08-29 21:49:48,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:49:48,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1196 transitions. [2023-08-29 21:49:48,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 170.85714285714286) internal successors, (1196), 7 states have internal predecessors, (1196), 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 21:49:48,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 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 21:49:48,841 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 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 21:49:48,841 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 288 flow. Second operand 7 states and 1196 transitions. [2023-08-29 21:49:48,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 145 transitions, 650 flow [2023-08-29 21:49:48,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 145 transitions, 629 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-29 21:49:48,856 INFO L231 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2023-08-29 21:49:48,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2023-08-29 21:49:48,856 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2023-08-29 21:49:48,856 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2023-08-29 21:49:48,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 155.47058823529412) internal successors, (2643), 17 states have internal predecessors, (2643), 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 21:49:48,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:49:48,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:49:48,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:49:48,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:49:48,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:49:48,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:49:48,862 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 21:49:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:49:49,058 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:49:49,059 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:49:49,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 446 flow [2023-08-29 21:49:49,096 INFO L130 PetriNetUnfolder]: 91/630 cut-off events. [2023-08-29 21:49:49,096 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:49:49,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 630 events. 91/630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2593 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 422. Up to 32 conditions per place. [2023-08-29 21:49:49,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 446 flow [2023-08-29 21:49:49,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 201 transitions, 446 flow [2023-08-29 21:49:49,104 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:49:49,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 201 transitions, 446 flow [2023-08-29 21:49:49,104 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 201 transitions, 446 flow [2023-08-29 21:49:49,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 446 flow [2023-08-29 21:49:49,157 INFO L130 PetriNetUnfolder]: 91/630 cut-off events. [2023-08-29 21:49:49,157 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:49:49,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 630 events. 91/630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2593 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 422. Up to 32 conditions per place. [2023-08-29 21:49:49,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 22512 [2023-08-29 21:49:51,289 INFO L134 LiptonReduction]: Checked pairs total: 61133 [2023-08-29 21:49:51,289 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-29 21:49:51,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:49:51,290 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;@7e7cb339, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:49:51,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:49:51,302 INFO L130 PetriNetUnfolder]: 38/170 cut-off events. [2023-08-29 21:49:51,302 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:49:51,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:49:51,302 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:49:51,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:49:51,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:49:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1608254725, now seen corresponding path program 1 times [2023-08-29 21:49:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:49:51,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245548347] [2023-08-29 21:49:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:49:51,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:49:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:49:51,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:49:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:49:51,327 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:49:51,327 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:49:51,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:49:51,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 21:49:51,328 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:49:51,328 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:49:51,328 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:49:51,329 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 21:49:51,348 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-29 21:49:51,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 231 transitions, 522 flow [2023-08-29 21:49:51,457 INFO L130 PetriNetUnfolder]: 152/1030 cut-off events. [2023-08-29 21:49:51,457 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:49:51,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 1030 events. 152/1030 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5088 event pairs, 23 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 675. Up to 80 conditions per place. [2023-08-29 21:49:51,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 231 transitions, 522 flow [2023-08-29 21:49:51,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 231 transitions, 522 flow [2023-08-29 21:49:51,479 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:49:51,479 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 231 transitions, 522 flow [2023-08-29 21:49:51,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 231 transitions, 522 flow [2023-08-29 21:49:51,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 231 transitions, 522 flow [2023-08-29 21:49:51,583 INFO L130 PetriNetUnfolder]: 152/1030 cut-off events. [2023-08-29 21:49:51,583 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:49:51,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 1030 events. 152/1030 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5088 event pairs, 23 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 675. Up to 80 conditions per place. [2023-08-29 21:49:51,626 INFO L119 LiptonReduction]: Number of co-enabled transitions 32480 [2023-08-29 21:49:53,902 INFO L134 LiptonReduction]: Checked pairs total: 88945 [2023-08-29 21:49:53,902 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-29 21:49:53,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:49:53,903 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;@7e7cb339, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:49:53,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:49:53,904 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-29 21:49:53,904 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:49:53,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:49:53,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:49:53,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:49:53,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:49:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash 71226, now seen corresponding path program 1 times [2023-08-29 21:49:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:49:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771262738] [2023-08-29 21:49:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:49:53,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:49:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:49:53,946 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 21:49:53,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:49:53,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771262738] [2023-08-29 21:49:53,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771262738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:49:53,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:49:53,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:49:53,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844515660] [2023-08-29 21:49:53,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:49:53,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:49:53,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:49:53,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:49:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:49:53,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 377 [2023-08-29 21:49:53,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 121 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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 21:49:53,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:49:53,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 377 [2023-08-29 21:49:53,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand