./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.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_27-funptr_racing.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 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --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 21:43:02,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:43:02,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:43:02,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:43:02,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:43:02,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:43:02,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:43:02,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:43:02,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:43:02,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:43:02,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:43:02,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:43:02,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:43:02,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:43:02,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:43:02,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:43:02,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:43:02,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:43:02,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:43:02,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:43:02,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:43:02,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:43:02,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:43:02,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:43:02,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:43:02,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:43:02,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:43:02,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:43:02,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:43:02,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:43:02,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:43:02,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:43:02,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:43:02,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:43:02,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:43:02,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:43:02,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:43:02,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:43:02,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:43:02,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:43:02,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:43:02,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:43:02,450 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:43:02,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:43:02,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:43:02,451 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:43:02,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:43:02,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:43:02,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:43:02,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:43:02,452 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:43:02,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:43:02,453 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:43:02,453 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:43:02,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:43:02,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:43:02,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:43:02,453 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:43:02,454 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:43:02,454 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:43:02,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:43:02,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:43:02,454 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:43:02,454 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:43:02,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:43:02,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:43:02,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:43:02,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:43:02,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:43:02,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:43:02,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:43:02,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:43:02,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:43:02,456 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:43:02,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:43:02,457 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:43:02,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:43:02,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:43:02,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:43:02,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:43:02,719 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:43:02,720 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:43:02,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-29 21:43:03,635 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:43:03,807 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:43:03,807 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-29 21:43:03,816 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cab544260/aa5e4596a98d4f2c996f08f0f715e333/FLAG9a55a1418 [2023-08-29 21:43:03,826 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cab544260/aa5e4596a98d4f2c996f08f0f715e333 [2023-08-29 21:43:03,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:43:03,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:43:03,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:43:03,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:43:03,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:43:03,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:43:03" (1/1) ... [2023-08-29 21:43:03,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620ca5a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:03, skipping insertion in model container [2023-08-29 21:43:03,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:43:03" (1/1) ... [2023-08-29 21:43:03,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:43:03,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:43:04,093 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_27-funptr_racing.i[41323,41336] [2023-08-29 21:43:04,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:43:04,115 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:43:04,146 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_27-funptr_racing.i[41323,41336] [2023-08-29 21:43:04,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:43:04,216 WARN L667 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 21:43:04,221 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:43:04,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04 WrapperNode [2023-08-29 21:43:04,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:43:04,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:43:04,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:43:04,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:43:04,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,282 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2023-08-29 21:43:04,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:43:04,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:43:04,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:43:04,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:43:04,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,324 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:43:04,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:43:04,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:43:04,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:43:04,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (1/1) ... [2023-08-29 21:43:04,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:43:04,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:04,373 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 21:43:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:43:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:43:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:43:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:43:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:43:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:43:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:43:04,410 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:43:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:43:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:43:04,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:43:04,411 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 21:43:04,389 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 21:43:04,496 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:43:04,497 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:43:04,692 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:43:04,697 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:43:04,697 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-29 21:43:04,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:43:04 BoogieIcfgContainer [2023-08-29 21:43:04,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:43:04,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:43:04,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:43:04,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:43:04,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:43:03" (1/3) ... [2023-08-29 21:43:04,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154617bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:43:04, skipping insertion in model container [2023-08-29 21:43:04,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:43:04" (2/3) ... [2023-08-29 21:43:04,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154617bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:43:04, skipping insertion in model container [2023-08-29 21:43:04,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:43:04" (3/3) ... [2023-08-29 21:43:04,704 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-08-29 21:43:04,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:43:04,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:43:04,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:43:04,756 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:43:04,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 153 transitions, 314 flow [2023-08-29 21:43:04,820 INFO L130 PetriNetUnfolder]: 24/197 cut-off events. [2023-08-29 21:43:04,821 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:43:04,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 197 events. 24/197 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 567 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2023-08-29 21:43:04,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 153 transitions, 314 flow [2023-08-29 21:43:04,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 153 transitions, 314 flow [2023-08-29 21:43:04,830 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:04,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 153 transitions, 314 flow [2023-08-29 21:43:04,838 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 153 transitions, 314 flow [2023-08-29 21:43:04,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 153 transitions, 314 flow [2023-08-29 21:43:04,863 INFO L130 PetriNetUnfolder]: 24/197 cut-off events. [2023-08-29 21:43:04,863 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:43:04,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 197 events. 24/197 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 567 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2023-08-29 21:43:04,866 INFO L119 LiptonReduction]: Number of co-enabled transitions 6200 [2023-08-29 21:43:07,542 INFO L134 LiptonReduction]: Checked pairs total: 13820 [2023-08-29 21:43:07,542 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-29 21:43:07,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:43:07,560 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;@49cd4afc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:07,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:43:07,562 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 21:43:07,563 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:07,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:07,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:07,563 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 21:43:07,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:07,566 INFO L85 PathProgramCache]: Analyzing trace with hash 19169, now seen corresponding path program 1 times [2023-08-29 21:43:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:07,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090219833] [2023-08-29 21:43:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:07,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:07,802 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 21:43:07,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:07,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090219833] [2023-08-29 21:43:07,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090219833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:07,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:07,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:07,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178317745] [2023-08-29 21:43:07,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:07,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:07,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:07,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:07,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 274 [2023-08-29 21:43:07,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 60 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 21:43:07,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:07,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 274 [2023-08-29 21:43:07,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:07,968 INFO L130 PetriNetUnfolder]: 257/571 cut-off events. [2023-08-29 21:43:07,969 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:43:07,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 571 events. 257/571 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2877 event pairs, 208 based on Foata normal form. 32/475 useless extension candidates. Maximal degree in co-relation 1073. Up to 475 conditions per place. [2023-08-29 21:43:07,973 INFO L137 encePairwiseOnDemand]: 254/274 looper letters, 50 selfloop transitions, 2 changer transitions 2/59 dead transitions. [2023-08-29 21:43:07,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 232 flow [2023-08-29 21:43:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-29 21:43:07,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559610705596107 [2023-08-29 21:43:07,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-29 21:43:07,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-29 21:43:07,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:07,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-29 21:43:07,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 21:43:08,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 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 21:43:08,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 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 21:43:08,001 INFO L175 Difference]: Start difference. First operand has 46 places, 60 transitions, 128 flow. Second operand 3 states and 457 transitions. [2023-08-29 21:43:08,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 232 flow [2023-08-29 21:43:08,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:43:08,005 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 90 flow [2023-08-29 21:43:08,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-08-29 21:43:08,008 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-29 21:43:08,008 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 90 flow [2023-08-29 21:43:08,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 21:43:08,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:08,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:08,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:43:08,009 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 21:43:08,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:08,010 INFO L85 PathProgramCache]: Analyzing trace with hash 19170, now seen corresponding path program 1 times [2023-08-29 21:43:08,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:08,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945937922] [2023-08-29 21:43:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:08,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:08,131 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 21:43:08,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:08,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945937922] [2023-08-29 21:43:08,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945937922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:08,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:08,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:08,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26965538] [2023-08-29 21:43:08,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:08,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:08,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:08,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:08,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 274 [2023-08-29 21:43:08,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 21:43:08,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:08,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 274 [2023-08-29 21:43:08,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:08,253 INFO L130 PetriNetUnfolder]: 239/522 cut-off events. [2023-08-29 21:43:08,253 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:43:08,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 522 events. 239/522 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2718 event pairs, 0 based on Foata normal form. 0/438 useless extension candidates. Maximal degree in co-relation 1024. Up to 482 conditions per place. [2023-08-29 21:43:08,274 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 50 selfloop transitions, 2 changer transitions 1/58 dead transitions. [2023-08-29 21:43:08,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 232 flow [2023-08-29 21:43:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-29 21:43:08,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340632603406326 [2023-08-29 21:43:08,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-29 21:43:08,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-29 21:43:08,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:08,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-29 21:43:08,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 21:43:08,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 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 21:43:08,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 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 21:43:08,284 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 90 flow. Second operand 3 states and 439 transitions. [2023-08-29 21:43:08,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 232 flow [2023-08-29 21:43:08,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:08,286 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 94 flow [2023-08-29 21:43:08,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-29 21:43:08,287 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-29 21:43:08,287 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 94 flow [2023-08-29 21:43:08,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 21:43:08,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:08,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:43:08,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:43:08,288 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 21:43:08,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 571482005, now seen corresponding path program 1 times [2023-08-29 21:43:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:08,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138039670] [2023-08-29 21:43:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:08,352 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 21:43:08,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:08,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138039670] [2023-08-29 21:43:08,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138039670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:08,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618531988] [2023-08-29 21:43:08,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:08,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:08,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:08,356 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 21:43:08,372 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 21:43:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:08,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:43:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:08,482 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 21:43:08,528 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 21:43:08,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:08,588 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 21:43:08,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618531988] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:08,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:08,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:43:08,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684535957] [2023-08-29 21:43:08,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:08,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:43:08,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:08,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:43:08,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:43:08,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 274 [2023-08-29 21:43:08,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 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 21:43:08,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:08,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 274 [2023-08-29 21:43:08,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:08,763 INFO L130 PetriNetUnfolder]: 35/98 cut-off events. [2023-08-29 21:43:08,764 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-29 21:43:08,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 98 events. 35/98 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 279 event pairs, 15 based on Foata normal form. 17/112 useless extension candidates. Maximal degree in co-relation 103. Up to 68 conditions per place. [2023-08-29 21:43:08,764 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-29 21:43:08,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 172 flow [2023-08-29 21:43:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:43:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:43:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-29 21:43:08,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48996350364963503 [2023-08-29 21:43:08,766 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-29 21:43:08,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-29 21:43:08,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:08,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-29 21:43:08,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 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 21:43:08,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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 21:43:08,769 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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 21:43:08,769 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 94 flow. Second operand 4 states and 537 transitions. [2023-08-29 21:43:08,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 172 flow [2023-08-29 21:43:08,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:08,770 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-29 21:43:08,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-29 21:43:08,771 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -17 predicate places. [2023-08-29 21:43:08,771 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-29 21:43:08,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 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 21:43:08,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:43:08,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:43:08,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:43:08,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:43:08,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:43:08,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:43:08,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 21:43:08,981 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 21:43:08,981 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:43:08,983 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:43:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 153 transitions, 314 flow [2023-08-29 21:43:08,996 INFO L130 PetriNetUnfolder]: 24/197 cut-off events. [2023-08-29 21:43:08,996 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:43:08,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 197 events. 24/197 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 567 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2023-08-29 21:43:08,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 153 transitions, 314 flow [2023-08-29 21:43:08,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 148 transitions, 301 flow [2023-08-29 21:43:08,998 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:08,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 148 transitions, 301 flow [2023-08-29 21:43:08,998 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 148 transitions, 301 flow [2023-08-29 21:43:08,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 148 transitions, 301 flow [2023-08-29 21:43:09,026 INFO L130 PetriNetUnfolder]: 23/192 cut-off events. [2023-08-29 21:43:09,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:09,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 192 events. 23/192 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 551 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2023-08-29 21:43:09,029 INFO L119 LiptonReduction]: Number of co-enabled transitions 6200 [2023-08-29 21:43:11,028 INFO L134 LiptonReduction]: Checked pairs total: 12182 [2023-08-29 21:43:11,029 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-29 21:43:11,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:43:11,042 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;@49cd4afc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:11,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:43:11,050 INFO L130 PetriNetUnfolder]: 0/22 cut-off events. [2023-08-29 21:43:11,050 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:11,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:11,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:43:11,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:43:11,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:11,051 INFO L85 PathProgramCache]: Analyzing trace with hash -242929554, now seen corresponding path program 1 times [2023-08-29 21:43:11,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:11,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132300320] [2023-08-29 21:43:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:11,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:11,071 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:43:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:11,106 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:43:11,107 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:43:11,107 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:43:11,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:43:11,107 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:43:11,108 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:43:11,109 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:43:11,109 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:43:11,143 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:43:11,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:11,183 INFO L130 PetriNetUnfolder]: 45/334 cut-off events. [2023-08-29 21:43:11,184 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:43:11,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 334 events. 45/334 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1210 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 199. Up to 8 conditions per place. [2023-08-29 21:43:11,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:11,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:11,189 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:11,189 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:11,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:11,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:11,215 INFO L130 PetriNetUnfolder]: 45/334 cut-off events. [2023-08-29 21:43:11,216 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:43:11,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 334 events. 45/334 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1210 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 199. Up to 8 conditions per place. [2023-08-29 21:43:11,227 INFO L119 LiptonReduction]: Number of co-enabled transitions 21452 [2023-08-29 21:43:14,072 INFO L134 LiptonReduction]: Checked pairs total: 58468 [2023-08-29 21:43:14,072 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-08-29 21:43:14,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:43:14,076 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;@49cd4afc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:14,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:43:14,077 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:43:14,077 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:14,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:14,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:14,077 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 21:43:14,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash 36800, now seen corresponding path program 1 times [2023-08-29 21:43:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:14,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971697677] [2023-08-29 21:43:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:14,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:14,118 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 21:43:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971697677] [2023-08-29 21:43:14,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971697677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:14,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:14,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:14,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424096577] [2023-08-29 21:43:14,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:14,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:14,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:14,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 368 [2023-08-29 21:43:14,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 105 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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 21:43:14,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:14,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 368 [2023-08-29 21:43:14,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:15,293 INFO L130 PetriNetUnfolder]: 11055/18456 cut-off events. [2023-08-29 21:43:15,293 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-29 21:43:15,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35546 conditions, 18456 events. 11055/18456 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 136242 event pairs, 9055 based on Foata normal form. 2150/17478 useless extension candidates. Maximal degree in co-relation 14190. Up to 14772 conditions per place. [2023-08-29 21:43:15,374 INFO L137 encePairwiseOnDemand]: 336/368 looper letters, 92 selfloop transitions, 2 changer transitions 2/112 dead transitions. [2023-08-29 21:43:15,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 432 flow [2023-08-29 21:43:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-08-29 21:43:15,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096014492753623 [2023-08-29 21:43:15,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-08-29 21:43:15,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-08-29 21:43:15,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:15,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-08-29 21:43:15,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 21:43:15,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 21:43:15,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 21:43:15,381 INFO L175 Difference]: Start difference. First operand has 79 places, 105 transitions, 228 flow. Second operand 3 states and 673 transitions. [2023-08-29 21:43:15,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 432 flow [2023-08-29 21:43:15,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:43:15,386 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 164 flow [2023-08-29 21:43:15,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-08-29 21:43:15,388 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -1 predicate places. [2023-08-29 21:43:15,388 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 164 flow [2023-08-29 21:43:15,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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 21:43:15,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:15,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:15,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:43:15,389 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 21:43:15,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash 36798, now seen corresponding path program 1 times [2023-08-29 21:43:15,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:15,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893667620] [2023-08-29 21:43:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:15,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:15,451 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 21:43:15,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893667620] [2023-08-29 21:43:15,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893667620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:15,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:15,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:15,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806865938] [2023-08-29 21:43:15,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:15,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:15,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:15,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:15,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 368 [2023-08-29 21:43:15,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 21:43:15,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:15,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 368 [2023-08-29 21:43:15,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:16,419 INFO L130 PetriNetUnfolder]: 10333/17125 cut-off events. [2023-08-29 21:43:16,419 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2023-08-29 21:43:16,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33473 conditions, 17125 events. 10333/17125 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 125126 event pairs, 4607 based on Foata normal form. 0/14895 useless extension candidates. Maximal degree in co-relation 30864. Up to 15843 conditions per place. [2023-08-29 21:43:16,487 INFO L137 encePairwiseOnDemand]: 364/368 looper letters, 76 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-29 21:43:16,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 94 transitions, 362 flow [2023-08-29 21:43:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2023-08-29 21:43:16,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561594202898551 [2023-08-29 21:43:16,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2023-08-29 21:43:16,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2023-08-29 21:43:16,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:16,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2023-08-29 21:43:16,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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 21:43:16,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 21:43:16,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 21:43:16,569 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 164 flow. Second operand 3 states and 614 transitions. [2023-08-29 21:43:16,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 94 transitions, 362 flow [2023-08-29 21:43:16,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 94 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:16,593 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 172 flow [2023-08-29 21:43:16,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-08-29 21:43:16,595 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2023-08-29 21:43:16,595 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 172 flow [2023-08-29 21:43:16,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 21:43:16,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:16,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:43:16,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:43:16,596 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 21:43:16,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash -345449957, now seen corresponding path program 1 times [2023-08-29 21:43:16,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:16,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355449990] [2023-08-29 21:43:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:16,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:16,673 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 21:43:16,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:16,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355449990] [2023-08-29 21:43:16,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355449990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:16,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438201294] [2023-08-29 21:43:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:16,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:16,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:16,695 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 21:43:16,712 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 21:43:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:43:16,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:16,794 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 21:43:16,827 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 21:43:16,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:16,860 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 21:43:16,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438201294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:16,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:16,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:43:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866227410] [2023-08-29 21:43:16,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:43:16,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:16,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:43:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:43:16,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 368 [2023-08-29 21:43:16,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 176.71428571428572) internal successors, (1237), 7 states have internal predecessors, (1237), 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 21:43:16,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:16,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 368 [2023-08-29 21:43:16,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:17,835 INFO L130 PetriNetUnfolder]: 9478/15054 cut-off events. [2023-08-29 21:43:17,835 INFO L131 PetriNetUnfolder]: For 399/399 co-relation queries the response was YES. [2023-08-29 21:43:17,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30377 conditions, 15054 events. 9478/15054 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 105385 event pairs, 1 based on Foata normal form. 19/13439 useless extension candidates. Maximal degree in co-relation 2088. Up to 12613 conditions per place. [2023-08-29 21:43:17,894 INFO L137 encePairwiseOnDemand]: 363/368 looper letters, 147 selfloop transitions, 4 changer transitions 1/168 dead transitions. [2023-08-29 21:43:17,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 168 transitions, 662 flow [2023-08-29 21:43:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:43:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:43:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1030 transitions. [2023-08-29 21:43:17,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2023-08-29 21:43:17,897 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1030 transitions. [2023-08-29 21:43:17,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1030 transitions. [2023-08-29 21:43:17,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:17,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1030 transitions. [2023-08-29 21:43:17,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 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 21:43:17,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 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 21:43:17,903 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 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 21:43:17,903 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 172 flow. Second operand 5 states and 1030 transitions. [2023-08-29 21:43:17,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 168 transitions, 662 flow [2023-08-29 21:43:17,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 168 transitions, 660 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:43:17,905 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 178 flow [2023-08-29 21:43:17,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2023-08-29 21:43:17,906 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2023-08-29 21:43:17,906 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 178 flow [2023-08-29 21:43:17,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 176.71428571428572) internal successors, (1237), 7 states have internal predecessors, (1237), 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 21:43:17,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:17,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:17,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 21:43:18,111 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 21:43:18,112 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 21:43:18,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash 712407272, now seen corresponding path program 1 times [2023-08-29 21:43:18,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:18,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490624811] [2023-08-29 21:43:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:18,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:18,169 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 21:43:18,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:18,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490624811] [2023-08-29 21:43:18,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490624811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:18,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:18,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:18,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595802776] [2023-08-29 21:43:18,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:18,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:18,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:18,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:18,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 368 [2023-08-29 21:43:18,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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 21:43:18,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:18,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 368 [2023-08-29 21:43:18,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:18,964 INFO L130 PetriNetUnfolder]: 9852/16076 cut-off events. [2023-08-29 21:43:18,964 INFO L131 PetriNetUnfolder]: For 2656/2656 co-relation queries the response was YES. [2023-08-29 21:43:18,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33504 conditions, 16076 events. 9852/16076 cut-off events. For 2656/2656 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 111502 event pairs, 3166 based on Foata normal form. 0/14808 useless extension candidates. Maximal degree in co-relation 13807. Up to 12825 conditions per place. [2023-08-29 21:43:19,024 INFO L137 encePairwiseOnDemand]: 362/368 looper letters, 85 selfloop transitions, 5 changer transitions 0/105 dead transitions. [2023-08-29 21:43:19,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 105 transitions, 442 flow [2023-08-29 21:43:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-29 21:43:19,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534420289855072 [2023-08-29 21:43:19,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-29 21:43:19,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-29 21:43:19,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:19,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-29 21:43:19,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 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 21:43:19,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 21:43:19,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 21:43:19,030 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 178 flow. Second operand 3 states and 611 transitions. [2023-08-29 21:43:19,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 105 transitions, 442 flow [2023-08-29 21:43:19,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 428 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:19,036 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 203 flow [2023-08-29 21:43:19,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2023-08-29 21:43:19,036 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2023-08-29 21:43:19,037 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 203 flow [2023-08-29 21:43:19,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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 21:43:19,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:19,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:19,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:43:19,037 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:43:19,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:19,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1891617860, now seen corresponding path program 1 times [2023-08-29 21:43:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:19,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990791834] [2023-08-29 21:43:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:19,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:19,111 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 21:43:19,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:19,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990791834] [2023-08-29 21:43:19,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990791834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:19,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52818612] [2023-08-29 21:43:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:19,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:19,114 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 21:43:19,129 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 21:43:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:19,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:43:19,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:19,227 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 21:43:19,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:19,264 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 21:43:19,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52818612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:19,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:19,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 21:43:19,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026120814] [2023-08-29 21:43:19,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:19,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:43:19,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:19,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:43:19,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:43:19,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 368 [2023-08-29 21:43:19,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 203 flow. Second operand has 12 states, 12 states have (on average 172.16666666666666) internal successors, (2066), 12 states have internal predecessors, (2066), 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 21:43:19,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:19,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 368 [2023-08-29 21:43:19,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:19,679 INFO L130 PetriNetUnfolder]: 1805/3075 cut-off events. [2023-08-29 21:43:19,679 INFO L131 PetriNetUnfolder]: For 626/626 co-relation queries the response was YES. [2023-08-29 21:43:19,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 3075 events. 1805/3075 cut-off events. For 626/626 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18261 event pairs, 11 based on Foata normal form. 353/3313 useless extension candidates. Maximal degree in co-relation 1892. Up to 2109 conditions per place. [2023-08-29 21:43:19,685 INFO L137 encePairwiseOnDemand]: 365/368 looper letters, 0 selfloop transitions, 0 changer transitions 122/122 dead transitions. [2023-08-29 21:43:19,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 122 transitions, 517 flow [2023-08-29 21:43:19,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:43:19,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:43:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 947 transitions. [2023-08-29 21:43:19,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146739130434783 [2023-08-29 21:43:19,688 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 947 transitions. [2023-08-29 21:43:19,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 947 transitions. [2023-08-29 21:43:19,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:19,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 947 transitions. [2023-08-29 21:43:19,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.4) internal successors, (947), 5 states have internal predecessors, (947), 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 21:43:19,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 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 21:43:19,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 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 21:43:19,692 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 203 flow. Second operand 5 states and 947 transitions. [2023-08-29 21:43:19,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 122 transitions, 517 flow [2023-08-29 21:43:19,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 122 transitions, 503 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:19,694 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2023-08-29 21:43:19,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2023-08-29 21:43:19,694 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -13 predicate places. [2023-08-29 21:43:19,695 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2023-08-29 21:43:19,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 172.16666666666666) internal successors, (2066), 12 states have internal predecessors, (2066), 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 21:43:19,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:43:19,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:43:19,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:43:19,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:43:19,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:43:19,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:43:19,703 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 21:43:19,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:19,902 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 21:43:19,902 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:43:19,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:19,942 INFO L130 PetriNetUnfolder]: 45/334 cut-off events. [2023-08-29 21:43:19,942 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:43:19,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 334 events. 45/334 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1210 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 199. Up to 8 conditions per place. [2023-08-29 21:43:19,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:19,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:19,945 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:19,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:19,945 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:19,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 217 transitions, 452 flow [2023-08-29 21:43:19,970 INFO L130 PetriNetUnfolder]: 45/334 cut-off events. [2023-08-29 21:43:19,971 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:43:19,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 334 events. 45/334 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1210 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 199. Up to 8 conditions per place. [2023-08-29 21:43:19,980 INFO L119 LiptonReduction]: Number of co-enabled transitions 21452 [2023-08-29 21:43:22,871 INFO L134 LiptonReduction]: Checked pairs total: 58073 [2023-08-29 21:43:22,872 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-29 21:43:22,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:43:22,875 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;@49cd4afc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:22,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:43:22,882 INFO L130 PetriNetUnfolder]: 10/79 cut-off events. [2023-08-29 21:43:22,882 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:43:22,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:22,882 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:43:22,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:43:22,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1724383359, now seen corresponding path program 1 times [2023-08-29 21:43:22,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:22,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667658625] [2023-08-29 21:43:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:22,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:22,904 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:43:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:22,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:43:22,918 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:43:22,918 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:43:22,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:43:22,918 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:43:22,919 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:43:22,919 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:43:22,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:43:22,941 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:43:22,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 281 transitions, 592 flow [2023-08-29 21:43:22,983 INFO L130 PetriNetUnfolder]: 71/512 cut-off events. [2023-08-29 21:43:22,984 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:43:22,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 512 events. 71/512 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2081 event pairs, 1 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 342. Up to 16 conditions per place. [2023-08-29 21:43:22,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 281 transitions, 592 flow [2023-08-29 21:43:22,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 281 transitions, 592 flow [2023-08-29 21:43:22,992 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:22,992 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 281 transitions, 592 flow [2023-08-29 21:43:22,992 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 281 transitions, 592 flow [2023-08-29 21:43:22,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 281 transitions, 592 flow [2023-08-29 21:43:23,028 INFO L130 PetriNetUnfolder]: 71/512 cut-off events. [2023-08-29 21:43:23,029 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:43:23,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 512 events. 71/512 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2081 event pairs, 1 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 342. Up to 16 conditions per place. [2023-08-29 21:43:23,044 INFO L119 LiptonReduction]: Number of co-enabled transitions 44268 [2023-08-29 21:43:25,338 INFO L134 LiptonReduction]: Checked pairs total: 145152 [2023-08-29 21:43:25,338 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-29 21:43:25,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:43:25,340 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;@49cd4afc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:25,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:43:25,341 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:43:25,341 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:25,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:25,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:25,342 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 21:43:25,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash 58709, now seen corresponding path program 1 times [2023-08-29 21:43:25,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:25,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530316186] [2023-08-29 21:43:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:25,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:25,384 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 21:43:25,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:25,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530316186] [2023-08-29 21:43:25,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530316186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:25,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:25,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:25,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822052265] [2023-08-29 21:43:25,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:25,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:25,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 469 [2023-08-29 21:43:25,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 144 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 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 21:43:25,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:25,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 469 [2023-08-29 21:43:25,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:46,335 INFO L130 PetriNetUnfolder]: 248119/365722 cut-off events. [2023-08-29 21:43:46,335 INFO L131 PetriNetUnfolder]: For 3452/3452 co-relation queries the response was YES. [2023-08-29 21:43:46,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703695 conditions, 365722 events. 248119/365722 cut-off events. For 3452/3452 co-relation queries the response was YES. Maximal size of possible extension queue 9220. Compared 3267947 event pairs, 201875 based on Foata normal form. 44472/355959 useless extension candidates. Maximal degree in co-relation 101722. Up to 290967 conditions per place. [2023-08-29 21:43:47,834 INFO L137 encePairwiseOnDemand]: 425/469 looper letters, 122 selfloop transitions, 2 changer transitions 2/153 dead transitions. [2023-08-29 21:43:47,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 153 transitions, 586 flow [2023-08-29 21:43:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-08-29 21:43:47,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233120113717129 [2023-08-29 21:43:47,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-08-29 21:43:47,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-08-29 21:43:47,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:47,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-08-29 21:43:47,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 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 21:43:48,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:43:48,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:43:48,009 INFO L175 Difference]: Start difference. First operand has 106 places, 144 transitions, 318 flow. Second operand 3 states and 877 transitions. [2023-08-29 21:43:48,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 153 transitions, 586 flow [2023-08-29 21:43:48,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 586 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:43:48,015 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 228 flow [2023-08-29 21:43:48,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2023-08-29 21:43:48,015 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -1 predicate places. [2023-08-29 21:43:48,015 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 228 flow [2023-08-29 21:43:48,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 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 21:43:48,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:48,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:48,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:43:48,016 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 21:43:48,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:48,016 INFO L85 PathProgramCache]: Analyzing trace with hash 58711, now seen corresponding path program 1 times [2023-08-29 21:43:48,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:48,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614382647] [2023-08-29 21:43:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:48,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:48,045 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 21:43:48,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:48,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614382647] [2023-08-29 21:43:48,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614382647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:48,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:48,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:48,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253107268] [2023-08-29 21:43:48,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:48,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:48,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:48,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:48,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 469 [2023-08-29 21:43:48,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 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 21:43:48,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:48,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 469 [2023-08-29 21:43:48,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:44:05,545 INFO L130 PetriNetUnfolder]: 231647/344013 cut-off events. [2023-08-29 21:44:05,546 INFO L131 PetriNetUnfolder]: For 7363/7363 co-relation queries the response was YES. [2023-08-29 21:44:06,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665328 conditions, 344013 events. 231647/344013 cut-off events. For 7363/7363 co-relation queries the response was YES. Maximal size of possible extension queue 8715. Compared 3079722 event pairs, 141776 based on Foata normal form. 0/304676 useless extension candidates. Maximal degree in co-relation 613477. Up to 313223 conditions per place. [2023-08-29 21:44:07,054 INFO L137 encePairwiseOnDemand]: 465/469 looper letters, 91 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-29 21:44:07,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 120 transitions, 454 flow [2023-08-29 21:44:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:44:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:44:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2023-08-29 21:44:07,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536602700781805 [2023-08-29 21:44:07,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2023-08-29 21:44:07,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2023-08-29 21:44:07,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:44:07,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2023-08-29 21:44:07,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 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 21:44:07,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:44:07,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:44:07,061 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 228 flow. Second operand 3 states and 779 transitions. [2023-08-29 21:44:07,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 120 transitions, 454 flow [2023-08-29 21:44:09,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 120 transitions, 448 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:44:09,040 INFO L231 Difference]: Finished difference. Result has 103 places, 101 transitions, 236 flow [2023-08-29 21:44:09,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=103, PETRI_TRANSITIONS=101} [2023-08-29 21:44:09,041 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -3 predicate places. [2023-08-29 21:44:09,041 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 101 transitions, 236 flow [2023-08-29 21:44:09,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 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 21:44:09,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:44:09,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:44:09,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:44:09,042 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 21:44:09,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:44:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1565189993, now seen corresponding path program 1 times [2023-08-29 21:44:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:44:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72388608] [2023-08-29 21:44:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:44:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:44:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:44:09,084 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 21:44:09,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:44:09,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72388608] [2023-08-29 21:44:09,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72388608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:44:09,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028895314] [2023-08-29 21:44:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:44:09,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:44:09,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:44:09,106 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 21:44:09,107 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 21:44:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:44:09,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:44:09,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:44:09,173 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 21:44:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:44:09,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:44:09,225 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 21:44:09,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028895314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:44:09,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:44:09,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:44:09,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31798441] [2023-08-29 21:44:09,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:44:09,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:44:09,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:44:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:44:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:44:09,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 469 [2023-08-29 21:44:09,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 226.71428571428572) internal successors, (1587), 7 states have internal predecessors, (1587), 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 21:44:09,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:44:09,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 469 [2023-08-29 21:44:09,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:44:24,035 INFO L130 PetriNetUnfolder]: 218198/304536 cut-off events. [2023-08-29 21:44:24,035 INFO L131 PetriNetUnfolder]: For 7132/7132 co-relation queries the response was YES. [2023-08-29 21:44:24,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612476 conditions, 304536 events. 218198/304536 cut-off events. For 7132/7132 co-relation queries the response was YES. Maximal size of possible extension queue 7495. Compared 2465479 event pairs, 2504 based on Foata normal form. 18/273834 useless extension candidates. Maximal degree in co-relation 41879. Up to 245865 conditions per place. [2023-08-29 21:44:25,565 INFO L137 encePairwiseOnDemand]: 464/469 looper letters, 239 selfloop transitions, 6 changer transitions 1/273 dead transitions. [2023-08-29 21:44:25,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 273 transitions, 1080 flow [2023-08-29 21:44:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:44:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:44:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1600 transitions. [2023-08-29 21:44:25,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685856432125089 [2023-08-29 21:44:25,589 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1600 transitions. [2023-08-29 21:44:25,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1600 transitions. [2023-08-29 21:44:25,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:44:25,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1600 transitions. [2023-08-29 21:44:25,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.6666666666667) internal successors, (1600), 6 states have internal predecessors, (1600), 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 21:44:25,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 469.0) internal successors, (3283), 7 states have internal predecessors, (3283), 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 21:44:25,597 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 469.0) internal successors, (3283), 7 states have internal predecessors, (3283), 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 21:44:25,597 INFO L175 Difference]: Start difference. First operand has 103 places, 101 transitions, 236 flow. Second operand 6 states and 1600 transitions. [2023-08-29 21:44:25,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 273 transitions, 1080 flow [2023-08-29 21:44:25,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 273 transitions, 1078 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:44:25,608 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 252 flow [2023-08-29 21:44:25,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2023-08-29 21:44:25,608 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 1 predicate places. [2023-08-29 21:44:25,609 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 252 flow [2023-08-29 21:44:25,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 226.71428571428572) internal successors, (1587), 7 states have internal predecessors, (1587), 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 21:44:25,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:44:25,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:44:25,629 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 21:44:25,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:44:25,814 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 21:44:25,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:44:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1426352847, now seen corresponding path program 1 times [2023-08-29 21:44:25,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:44:25,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439551605] [2023-08-29 21:44:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:44:25,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:44:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:44:25,876 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 21:44:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:44:25,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439551605] [2023-08-29 21:44:25,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439551605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:44:25,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:44:25,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:44:25,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876050280] [2023-08-29 21:44:25,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:44:25,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:44:25,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:44:25,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:44:25,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:44:25,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 469 [2023-08-29 21:44:25,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 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 21:44:25,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:44:25,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 469 [2023-08-29 21:44:25,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:44:45,258 INFO L130 PetriNetUnfolder]: 270894/384844 cut-off events. [2023-08-29 21:44:45,258 INFO L131 PetriNetUnfolder]: For 48873/48873 co-relation queries the response was YES. [2023-08-29 21:44:45,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787734 conditions, 384844 events. 270894/384844 cut-off events. For 48873/48873 co-relation queries the response was YES. Maximal size of possible extension queue 8922. Compared 3162603 event pairs, 91090 based on Foata normal form. 0/355724 useless extension candidates. Maximal degree in co-relation 120813. Up to 346728 conditions per place. [2023-08-29 21:44:47,326 INFO L137 encePairwiseOnDemand]: 461/469 looper letters, 114 selfloop transitions, 7 changer transitions 0/144 dead transitions. [2023-08-29 21:44:47,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 144 transitions, 611 flow [2023-08-29 21:44:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:44:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:44:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2023-08-29 21:44:47,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515280739161336 [2023-08-29 21:44:47,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2023-08-29 21:44:47,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2023-08-29 21:44:47,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:44:47,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2023-08-29 21:44:47,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 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 21:44:47,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:44:47,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:44:47,333 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 252 flow. Second operand 3 states and 776 transitions. [2023-08-29 21:44:47,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 144 transitions, 611 flow [2023-08-29 21:44:47,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 144 transitions, 599 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:44:47,349 INFO L231 Difference]: Finished difference. Result has 108 places, 108 transitions, 292 flow [2023-08-29 21:44:47,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=108, PETRI_TRANSITIONS=108} [2023-08-29 21:44:47,350 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 2 predicate places. [2023-08-29 21:44:47,350 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 108 transitions, 292 flow [2023-08-29 21:44:47,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 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 21:44:47,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:44:47,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:44:47,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:44:47,351 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 21:44:47,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:44:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1928217455, now seen corresponding path program 1 times [2023-08-29 21:44:47,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:44:47,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339228469] [2023-08-29 21:44:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:44:47,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:44:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:44:47,427 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 21:44:47,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:44:47,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339228469] [2023-08-29 21:44:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339228469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:44:47,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:44:47,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:44:47,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111352960] [2023-08-29 21:44:47,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:44:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:44:47,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:44:47,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:44:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:44:47,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 469 [2023-08-29 21:44:47,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 108 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 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 21:44:47,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:44:47,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 469 [2023-08-29 21:44:47,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:05,376 INFO L130 PetriNetUnfolder]: 217555/314773 cut-off events. [2023-08-29 21:45:05,377 INFO L131 PetriNetUnfolder]: For 55106/55560 co-relation queries the response was YES. [2023-08-29 21:45:06,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661495 conditions, 314773 events. 217555/314773 cut-off events. For 55106/55560 co-relation queries the response was YES. Maximal size of possible extension queue 7942. Compared 2679841 event pairs, 146863 based on Foata normal form. 5672/297054 useless extension candidates. Maximal degree in co-relation 208193. Up to 224688 conditions per place. [2023-08-29 21:45:07,016 INFO L137 encePairwiseOnDemand]: 466/469 looper letters, 138 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2023-08-29 21:45:07,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 169 transitions, 722 flow [2023-08-29 21:45:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:45:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:45:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 817 transitions. [2023-08-29 21:45:07,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806680881307748 [2023-08-29 21:45:07,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 817 transitions. [2023-08-29 21:45:07,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 817 transitions. [2023-08-29 21:45:07,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:07,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 817 transitions. [2023-08-29 21:45:07,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:07,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:45:07,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:45:07,022 INFO L175 Difference]: Start difference. First operand has 108 places, 108 transitions, 292 flow. Second operand 3 states and 817 transitions. [2023-08-29 21:45:07,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 169 transitions, 722 flow [2023-08-29 21:45:07,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 169 transitions, 711 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:45:07,064 INFO L231 Difference]: Finished difference. Result has 110 places, 109 transitions, 299 flow [2023-08-29 21:45:07,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=110, PETRI_TRANSITIONS=109} [2023-08-29 21:45:07,064 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 4 predicate places. [2023-08-29 21:45:07,065 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 109 transitions, 299 flow [2023-08-29 21:45:07,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 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 21:45:07,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:07,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:45:07,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:45:07,065 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 21:45:07,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1928217575, now seen corresponding path program 1 times [2023-08-29 21:45:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:07,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78968366] [2023-08-29 21:45:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:07,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:07,116 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 21:45:07,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:07,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78968366] [2023-08-29 21:45:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78968366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:07,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:45:07,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:45:07,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117554784] [2023-08-29 21:45:07,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:07,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:45:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:45:07,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:45:07,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 469 [2023-08-29 21:45:07,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 109 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:07,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:07,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 469 [2023-08-29 21:45:07,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:23,939 INFO L130 PetriNetUnfolder]: 200867/292388 cut-off events. [2023-08-29 21:45:23,939 INFO L131 PetriNetUnfolder]: For 69353/69807 co-relation queries the response was YES. [2023-08-29 21:45:24,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620950 conditions, 292388 events. 200867/292388 cut-off events. For 69353/69807 co-relation queries the response was YES. Maximal size of possible extension queue 7402. Compared 2493971 event pairs, 145077 based on Foata normal form. 0/275668 useless extension candidates. Maximal degree in co-relation 487324. Up to 221740 conditions per place. [2023-08-29 21:45:25,847 INFO L137 encePairwiseOnDemand]: 464/469 looper letters, 185 selfloop transitions, 5 changer transitions 0/219 dead transitions. [2023-08-29 21:45:25,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 219 transitions, 931 flow [2023-08-29 21:45:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:45:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:45:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1084 transitions. [2023-08-29 21:45:25,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5778251599147122 [2023-08-29 21:45:25,865 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1084 transitions. [2023-08-29 21:45:25,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1084 transitions. [2023-08-29 21:45:25,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:25,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1084 transitions. [2023-08-29 21:45:25,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 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 21:45:25,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 469.0) internal successors, (2345), 5 states have internal predecessors, (2345), 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 21:45:25,881 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 469.0) internal successors, (2345), 5 states have internal predecessors, (2345), 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 21:45:25,881 INFO L175 Difference]: Start difference. First operand has 110 places, 109 transitions, 299 flow. Second operand 4 states and 1084 transitions. [2023-08-29 21:45:25,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 219 transitions, 931 flow [2023-08-29 21:45:27,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 219 transitions, 929 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:45:27,526 INFO L231 Difference]: Finished difference. Result has 113 places, 109 transitions, 311 flow [2023-08-29 21:45:27,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=113, PETRI_TRANSITIONS=109} [2023-08-29 21:45:27,526 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 7 predicate places. [2023-08-29 21:45:27,526 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 109 transitions, 311 flow [2023-08-29 21:45:27,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:45:27,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:45:27,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:45:27,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:45:27,527 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:45:27,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:45:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash 24833438, now seen corresponding path program 1 times [2023-08-29 21:45:27,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:45:27,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638798700] [2023-08-29 21:45:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:27,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:45:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:27,563 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 21:45:27,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:45:27,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638798700] [2023-08-29 21:45:27,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638798700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:45:27,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841568098] [2023-08-29 21:45:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:45:27,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:45:27,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:45:27,566 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 21:45:27,567 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 21:45:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:45:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:45:27,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:45:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:45:27,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:45:27,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841568098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:45:27,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:45:27,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-29 21:45:27,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699237987] [2023-08-29 21:45:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:45:27,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:45:27,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:45:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:45:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:45:27,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 469 [2023-08-29 21:45:27,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 109 transitions, 311 flow. Second operand has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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 21:45:27,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:45:27,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 469 [2023-08-29 21:45:27,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:45:48,367 INFO L130 PetriNetUnfolder]: 239154/349759 cut-off events. [2023-08-29 21:45:48,368 INFO L131 PetriNetUnfolder]: For 82515/82611 co-relation queries the response was YES. [2023-08-29 21:45:49,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749411 conditions, 349759 events. 239154/349759 cut-off events. For 82515/82611 co-relation queries the response was YES. Maximal size of possible extension queue 8825. Compared 3115972 event pairs, 51354 based on Foata normal form. 5/335283 useless extension candidates. Maximal degree in co-relation 530662. Up to 184114 conditions per place. [2023-08-29 21:45:50,802 INFO L137 encePairwiseOnDemand]: 465/469 looper letters, 224 selfloop transitions, 4 changer transitions 0/257 dead transitions. [2023-08-29 21:45:50,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 257 transitions, 1155 flow [2023-08-29 21:45:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:45:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:45:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1355 transitions. [2023-08-29 21:45:50,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5778251599147122 [2023-08-29 21:45:50,821 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1355 transitions. [2023-08-29 21:45:50,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1355 transitions. [2023-08-29 21:45:50,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:45:50,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1355 transitions. [2023-08-29 21:45:50,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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 21:45:50,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 469.0) internal successors, (2814), 6 states have internal predecessors, (2814), 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 21:45:50,829 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 469.0) internal successors, (2814), 6 states have internal predecessors, (2814), 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 21:45:50,829 INFO L175 Difference]: Start difference. First operand has 113 places, 109 transitions, 311 flow. Second operand 5 states and 1355 transitions. [2023-08-29 21:45:50,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 257 transitions, 1155 flow [2023-08-29 21:46:20,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 257 transitions, 1146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:46:20,329 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 330 flow [2023-08-29 21:46:20,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2023-08-29 21:46:20,330 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 12 predicate places. [2023-08-29 21:46:20,330 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 330 flow [2023-08-29 21:46:20,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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 21:46:20,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:46:20,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:46:20,337 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 21:46:20,535 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,SelfDestructingSolverStorable16 [2023-08-29 21:46:20,535 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:46:20,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:46:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash -803203698, now seen corresponding path program 2 times [2023-08-29 21:46:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:46:20,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885177463] [2023-08-29 21:46:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:46:20,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:46:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:46:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:46:20,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:46:20,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885177463] [2023-08-29 21:46:20,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885177463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:46:20,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:46:20,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:46:20,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701748082] [2023-08-29 21:46:20,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:46:20,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:46:20,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:46:20,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:46:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:46:20,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 469 [2023-08-29 21:46:20,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 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 21:46:20,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:46:20,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 469 [2023-08-29 21:46:20,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:46:47,917 INFO L130 PetriNetUnfolder]: 308333/453522 cut-off events. [2023-08-29 21:46:47,917 INFO L131 PetriNetUnfolder]: For 138402/138860 co-relation queries the response was YES. [2023-08-29 21:46:49,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973929 conditions, 453522 events. 308333/453522 cut-off events. For 138402/138860 co-relation queries the response was YES. Maximal size of possible extension queue 11742. Compared 4132584 event pairs, 197974 based on Foata normal form. 3646/434810 useless extension candidates. Maximal degree in co-relation 721775. Up to 364240 conditions per place. [2023-08-29 21:46:51,053 INFO L137 encePairwiseOnDemand]: 441/469 looper letters, 132 selfloop transitions, 28 changer transitions 0/188 dead transitions. [2023-08-29 21:46:51,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 188 transitions, 889 flow [2023-08-29 21:46:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:46:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:46:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-08-29 21:46:51,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437100213219617 [2023-08-29 21:46:51,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-08-29 21:46:51,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-08-29 21:46:51,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:46:51,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-08-29 21:46:51,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 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 21:46:51,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:46:51,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 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 21:46:51,058 INFO L175 Difference]: Start difference. First operand has 118 places, 111 transitions, 330 flow. Second operand 3 states and 765 transitions. [2023-08-29 21:46:51,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 188 transitions, 889 flow [2023-08-29 21:47:08,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 188 transitions, 886 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:47:08,945 INFO L231 Difference]: Finished difference. Result has 120 places, 135 transitions, 516 flow [2023-08-29 21:47:08,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=516, PETRI_PLACES=120, PETRI_TRANSITIONS=135} [2023-08-29 21:47:08,946 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 14 predicate places. [2023-08-29 21:47:08,946 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 135 transitions, 516 flow [2023-08-29 21:47:08,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 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 21:47:08,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:47:08,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:47:08,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 21:47:08,947 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:47:08,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:47:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash -753805802, now seen corresponding path program 3 times [2023-08-29 21:47:08,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:47:08,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895770809] [2023-08-29 21:47:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:47:08,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:47:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:47:08,980 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 21:47:08,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:47:08,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895770809] [2023-08-29 21:47:08,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895770809] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:47:08,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009047698] [2023-08-29 21:47:08,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 21:47:08,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:47:08,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:47:08,982 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 21:47:08,984 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 21:47:09,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-29 21:47:09,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:47:09,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:47:09,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:47:09,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 21:47:09,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:47:09,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 21:47:09,137 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 21:47:09,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:47:09,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009047698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:47:09,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:47:09,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-29 21:47:09,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995207716] [2023-08-29 21:47:09,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:47:09,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:47:09,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:47:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:47:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:47:09,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 469 [2023-08-29 21:47:09,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 135 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 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 21:47:09,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:47:09,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 469 [2023-08-29 21:47:09,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:48:12,259 INFO L130 PetriNetUnfolder]: 567886/862857 cut-off events. [2023-08-29 21:48:12,259 INFO L131 PetriNetUnfolder]: For 598602/610877 co-relation queries the response was YES. [2023-08-29 21:48:15,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2311129 conditions, 862857 events. 567886/862857 cut-off events. For 598602/610877 co-relation queries the response was YES. Maximal size of possible extension queue 20878. Compared 8645638 event pairs, 173408 based on Foata normal form. 65916/892820 useless extension candidates. Maximal degree in co-relation 1706095. Up to 500689 conditions per place. [2023-08-29 21:48:19,271 INFO L137 encePairwiseOnDemand]: 435/469 looper letters, 151 selfloop transitions, 54 changer transitions 0/230 dead transitions. [2023-08-29 21:48:19,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 230 transitions, 1344 flow [2023-08-29 21:48:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:48:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:48:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 938 transitions. [2023-08-29 21:48:19,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-29 21:48:19,273 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 938 transitions. [2023-08-29 21:48:19,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 938 transitions. [2023-08-29 21:48:19,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:48:19,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 938 transitions. [2023-08-29 21:48:19,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.5) internal successors, (938), 4 states have internal predecessors, (938), 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 21:48:19,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 469.0) internal successors, (2345), 5 states have internal predecessors, (2345), 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 21:48:19,277 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 469.0) internal successors, (2345), 5 states have internal predecessors, (2345), 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 21:48:19,277 INFO L175 Difference]: Start difference. First operand has 120 places, 135 transitions, 516 flow. Second operand 4 states and 938 transitions. [2023-08-29 21:48:19,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 230 transitions, 1344 flow [2023-08-29 21:51:38,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 230 transitions, 1288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:51:38,610 INFO L231 Difference]: Finished difference. Result has 123 places, 175 transitions, 897 flow [2023-08-29 21:51:38,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=897, PETRI_PLACES=123, PETRI_TRANSITIONS=175} [2023-08-29 21:51:38,610 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 17 predicate places. [2023-08-29 21:51:38,610 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 175 transitions, 897 flow [2023-08-29 21:51:38,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 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 21:51:38,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:51:38,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:51:38,624 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 21:51:38,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:51:38,813 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:51:38,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:51:38,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1978952774, now seen corresponding path program 4 times [2023-08-29 21:51:38,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:51:38,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355198321] [2023-08-29 21:51:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:51:38,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:51:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:51:38,859 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 21:51:38,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:51:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355198321] [2023-08-29 21:51:38,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355198321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:51:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768614613] [2023-08-29 21:51:38,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 21:51:38,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:51:38,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:51:38,878 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:51:38,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:51:38,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 21:51:38,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:51:38,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 21:51:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:51:38,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 21:51:38,971 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2023-08-29 21:51:38,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2023-08-29 21:51:38,989 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2023-08-29 21:51:38,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2023-08-29 21:51:39,015 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-08-29 21:51:39,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-29 21:51:39,023 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 21:51:39,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:51:39,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768614613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:51:39,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:51:39,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-29 21:51:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499366536] [2023-08-29 21:51:39,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:51:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:51:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:51:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:51:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:51:39,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 469 [2023-08-29 21:51:39,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 175 transitions, 897 flow. Second operand has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 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 21:51:39,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:51:39,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 469 [2023-08-29 21:51:39,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:52:20,704 INFO L130 PetriNetUnfolder]: 318670/530629 cut-off events. [2023-08-29 21:52:20,704 INFO L131 PetriNetUnfolder]: For 645201/661930 co-relation queries the response was YES. [2023-08-29 21:52:22,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1647118 conditions, 530629 events. 318670/530629 cut-off events. For 645201/661930 co-relation queries the response was YES. Maximal size of possible extension queue 12717. Compared 5762977 event pairs, 64138 based on Foata normal form. 30473/535646 useless extension candidates. Maximal degree in co-relation 788288. Up to 236634 conditions per place. [2023-08-29 21:52:24,825 INFO L137 encePairwiseOnDemand]: 428/469 looper letters, 214 selfloop transitions, 214 changer transitions 0/453 dead transitions. [2023-08-29 21:52:24,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 453 transitions, 3185 flow [2023-08-29 21:52:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:52:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:52:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1262 transitions. [2023-08-29 21:52:24,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381663113006396 [2023-08-29 21:52:24,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1262 transitions. [2023-08-29 21:52:24,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1262 transitions. [2023-08-29 21:52:24,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:52:24,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1262 transitions. [2023-08-29 21:52:24,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 252.4) internal successors, (1262), 5 states have internal predecessors, (1262), 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 21:52:24,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 469.0) internal successors, (2814), 6 states have internal predecessors, (2814), 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 21:52:24,850 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 469.0) internal successors, (2814), 6 states have internal predecessors, (2814), 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 21:52:24,851 INFO L175 Difference]: Start difference. First operand has 123 places, 175 transitions, 897 flow. Second operand 5 states and 1262 transitions. [2023-08-29 21:52:24,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 453 transitions, 3185 flow [2023-08-29 21:52:42,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 453 transitions, 3184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:52:42,175 INFO L231 Difference]: Finished difference. Result has 126 places, 328 transitions, 2381 flow [2023-08-29 21:52:42,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2381, PETRI_PLACES=126, PETRI_TRANSITIONS=328} [2023-08-29 21:52:42,175 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 20 predicate places. [2023-08-29 21:52:42,176 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 328 transitions, 2381 flow [2023-08-29 21:52:42,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 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 21:52:42,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:52:42,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:52:42,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-29 21:52:42,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:52:42,381 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:52:42,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:52:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1891564189, now seen corresponding path program 1 times [2023-08-29 21:52:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:52:42,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458832094] [2023-08-29 21:52:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:52:42,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:52:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:52:42,429 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 21:52:42,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:52:42,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458832094] [2023-08-29 21:52:42,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458832094] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:52:42,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479515663] [2023-08-29 21:52:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:52:42,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:52:42,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:52:42,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:52:42,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:52:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:52:42,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:52:42,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:52:42,543 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 21:52:42,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:52:42,563 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 21:52:42,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479515663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:52:42,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:52:42,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:52:42,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005989303] [2023-08-29 21:52:42,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:52:42,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:52:42,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:52:42,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:52:42,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:52:42,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 469 [2023-08-29 21:52:42,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 328 transitions, 2381 flow. Second operand has 9 states, 9 states have (on average 231.33333333333334) internal successors, (2082), 9 states have internal predecessors, (2082), 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 21:52:42,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:52:42,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 469 [2023-08-29 21:52:42,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:52:45,844 INFO L130 PetriNetUnfolder]: 26399/42827 cut-off events. [2023-08-29 21:52:45,844 INFO L131 PetriNetUnfolder]: For 102603/104035 co-relation queries the response was YES. [2023-08-29 21:52:45,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154797 conditions, 42827 events. 26399/42827 cut-off events. For 102603/104035 co-relation queries the response was YES. Maximal size of possible extension queue 1294. Compared 346485 event pairs, 3074 based on Foata normal form. 3767/44481 useless extension candidates. Maximal degree in co-relation 154781. Up to 28195 conditions per place. [2023-08-29 21:52:45,989 INFO L137 encePairwiseOnDemand]: 466/469 looper letters, 0 selfloop transitions, 0 changer transitions 485/485 dead transitions. [2023-08-29 21:52:45,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 485 transitions, 4399 flow [2023-08-29 21:52:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:52:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:52:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1504 transitions. [2023-08-29 21:52:45,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344705046197583 [2023-08-29 21:52:45,992 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1504 transitions. [2023-08-29 21:52:45,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1504 transitions. [2023-08-29 21:52:45,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:52:45,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1504 transitions. [2023-08-29 21:52:45,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 250.66666666666666) internal successors, (1504), 6 states have internal predecessors, (1504), 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 21:52:45,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 469.0) internal successors, (3283), 7 states have internal predecessors, (3283), 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 21:52:45,996 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 469.0) internal successors, (3283), 7 states have internal predecessors, (3283), 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 21:52:45,997 INFO L175 Difference]: Start difference. First operand has 126 places, 328 transitions, 2381 flow. Second operand 6 states and 1504 transitions. [2023-08-29 21:52:45,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 485 transitions, 4399 flow [2023-08-29 21:52:46,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 485 transitions, 4077 flow, removed 152 selfloop flow, removed 5 redundant places. [2023-08-29 21:52:46,106 INFO L231 Difference]: Finished difference. Result has 100 places, 0 transitions, 0 flow [2023-08-29 21:52:46,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=100, PETRI_TRANSITIONS=0} [2023-08-29 21:52:46,106 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -6 predicate places. [2023-08-29 21:52:46,107 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 0 transitions, 0 flow [2023-08-29 21:52:46,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 231.33333333333334) internal successors, (2082), 9 states have internal predecessors, (2082), 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 21:52:46,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:52:46,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:52:46,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:52:46,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:52:46,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:52:46,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:52:46,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-29 21:52:46,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-29 21:52:46,312 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:52:46,313 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:52:46,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 281 transitions, 592 flow [2023-08-29 21:52:46,346 INFO L130 PetriNetUnfolder]: 71/512 cut-off events. [2023-08-29 21:52:46,346 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:52:46,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 512 events. 71/512 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2081 event pairs, 1 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 342. Up to 16 conditions per place. [2023-08-29 21:52:46,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 281 transitions, 592 flow [2023-08-29 21:52:46,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 281 transitions, 592 flow [2023-08-29 21:52:46,351 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:52:46,351 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 281 transitions, 592 flow [2023-08-29 21:52:46,351 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 281 transitions, 592 flow [2023-08-29 21:52:46,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 281 transitions, 592 flow [2023-08-29 21:52:46,382 INFO L130 PetriNetUnfolder]: 71/512 cut-off events. [2023-08-29 21:52:46,383 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:52:46,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 512 events. 71/512 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2081 event pairs, 1 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 342. Up to 16 conditions per place. [2023-08-29 21:52:46,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 44268 [2023-08-29 21:52:49,152 INFO L134 LiptonReduction]: Checked pairs total: 129749 [2023-08-29 21:52:49,153 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-29 21:52:49,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:52:49,161 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;@49cd4afc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:52:49,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:52:49,169 INFO L130 PetriNetUnfolder]: 29/146 cut-off events. [2023-08-29 21:52:49,169 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:52:49,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:52:49,169 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:52:49,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:52:49,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:52:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash 300878636, now seen corresponding path program 1 times [2023-08-29 21:52:49,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:52:49,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626574735] [2023-08-29 21:52:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:52:49,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:52:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:52:49,226 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:52:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:52:49,246 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:52:49,260 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:52:49,261 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:52:49,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 21:52:49,261 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:52:49,263 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:52:49,264 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:52:49,265 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:52:49,301 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:52:49,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 345 transitions, 734 flow [2023-08-29 21:52:49,395 INFO L130 PetriNetUnfolder]: 109/774 cut-off events. [2023-08-29 21:52:49,395 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:52:49,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 774 events. 109/774 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3463 event pairs, 6 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 532. Up to 32 conditions per place. [2023-08-29 21:52:49,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 345 transitions, 734 flow [2023-08-29 21:52:49,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 345 transitions, 734 flow [2023-08-29 21:52:49,409 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:52:49,409 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 345 transitions, 734 flow [2023-08-29 21:52:49,409 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 345 transitions, 734 flow [2023-08-29 21:52:49,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 345 transitions, 734 flow [2023-08-29 21:52:49,472 INFO L130 PetriNetUnfolder]: 109/774 cut-off events. [2023-08-29 21:52:49,473 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:52:49,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 774 events. 109/774 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3463 event pairs, 6 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 532. Up to 32 conditions per place. [2023-08-29 21:52:49,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 75144 [2023-08-29 21:52:52,359 INFO L134 LiptonReduction]: Checked pairs total: 224178 [2023-08-29 21:52:52,359 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-08-29 21:52:52,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:52:52,360 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;@49cd4afc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:52:52,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:52:52,361 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:52:52,361 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:52:52,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:52:52,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:52:52,361 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 21:52:52,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:52:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash 84936, now seen corresponding path program 1 times [2023-08-29 21:52:52,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:52:52,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412670344] [2023-08-29 21:52:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:52:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:52:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:52:52,375 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 21:52:52,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:52:52,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412670344] [2023-08-29 21:52:52,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412670344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:52:52,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:52:52,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:52:52,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247062914] [2023-08-29 21:52:52,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:52:52,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:52:52,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:52:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:52:52,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:52:52,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 568 [2023-08-29 21:52:52,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 183 transitions, 410 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 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 21:52:52,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:52:52,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 568 [2023-08-29 21:52:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15