./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/pthread-ext/29_conditionals_vs.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 c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 02:34:05,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:34:05,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:34:05,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:34:05,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:34:05,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:34:05,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:34:05,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:34:05,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:34:05,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:34:05,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:34:05,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:34:05,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:34:05,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:34:05,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:34:05,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:34:05,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:34:05,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:34:05,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:34:05,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:34:05,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:34:05,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:34:05,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:34:05,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:34:05,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:34:05,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:34:05,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:34:05,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:34:05,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:34:05,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:34:05,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:34:05,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:34:05,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:34:05,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:34:05,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:34:05,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:34:05,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:34:05,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:34:05,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:34:05,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:34:05,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:34:05,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:34:05,555 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:34:05,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:34:05,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:34:05,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:34:05,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:34:05,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:34:05,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:34:05,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:34:05,558 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:34:05,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:34:05,559 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:34:05,559 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:34:05,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:34:05,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:34:05,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:34:05,559 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:34:05,559 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:34:05,560 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:34:05,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:34:05,560 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:34:05,560 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:34:05,560 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:34:05,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:34:05,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:34:05,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:34:05,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:34:05,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:34:05,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:34:05,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:34:05,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:34:05,561 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:34:05,562 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:34:05,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:34:05,562 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:34:05,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:34:05,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:34:05,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:34:05,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:34:05,835 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:34:05,836 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:34:05,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-08-30 02:34:06,812 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:34:07,010 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:34:07,010 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-08-30 02:34:07,018 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2262cc236/b0a0557c78344cdcbafa0ed9bc0fd42d/FLAG372cf48f4 [2023-08-30 02:34:07,028 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2262cc236/b0a0557c78344cdcbafa0ed9bc0fd42d [2023-08-30 02:34:07,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:34:07,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:34:07,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:34:07,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:34:07,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:34:07,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c26c7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07, skipping insertion in model container [2023-08-30 02:34:07,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:34:07,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:34:07,332 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-08-30 02:34:07,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:34:07,346 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:34:07,383 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-08-30 02:34:07,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:34:07,416 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:34:07,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07 WrapperNode [2023-08-30 02:34:07,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:34:07,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:34:07,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:34:07,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:34:07,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,462 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 61 [2023-08-30 02:34:07,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:34:07,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:34:07,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:34:07,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:34:07,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,497 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:34:07,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:34:07,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:34:07,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:34:07,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (1/1) ... [2023-08-30 02:34:07,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:34:07,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:34:07,528 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) [2023-08-30 02:34:07,530 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 [2023-08-30 02:34:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 02:34:07,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 02:34:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:34:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:34:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:34:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:34:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:34:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:34:07,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:34:07,557 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 02:34:07,648 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:34:07,649 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:34:07,795 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:34:07,822 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:34:07,823 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 02:34:07,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:34:07 BoogieIcfgContainer [2023-08-30 02:34:07,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:34:07,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:34:07,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:34:07,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:34:07,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:34:07" (1/3) ... [2023-08-30 02:34:07,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b87f20e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:34:07, skipping insertion in model container [2023-08-30 02:34:07,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:34:07" (2/3) ... [2023-08-30 02:34:07,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b87f20e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:34:07, skipping insertion in model container [2023-08-30 02:34:07,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:34:07" (3/3) ... [2023-08-30 02:34:07,833 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-08-30 02:34:07,844 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:34:07,844 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-30 02:34:07,844 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:34:07,898 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:34:07,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 60 transitions, 125 flow [2023-08-30 02:34:07,948 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2023-08-30 02:34:07,948 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:07,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 75 events. 6/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 106 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2023-08-30 02:34:07,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 60 transitions, 125 flow [2023-08-30 02:34:07,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 60 transitions, 125 flow [2023-08-30 02:34:07,957 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:34:07,962 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 60 transitions, 125 flow [2023-08-30 02:34:07,964 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 60 transitions, 125 flow [2023-08-30 02:34:07,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 60 transitions, 125 flow [2023-08-30 02:34:07,976 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2023-08-30 02:34:07,976 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:07,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 75 events. 6/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 106 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2023-08-30 02:34:07,978 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044 [2023-08-30 02:34:09,643 INFO L134 LiptonReduction]: Checked pairs total: 887 [2023-08-30 02:34:09,643 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-30 02:34:09,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:34:09,656 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;@7875655b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:34:09,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 02:34:09,657 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:34:09,658 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:09,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:09,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:09,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:34:09,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash 9680, now seen corresponding path program 1 times [2023-08-30 02:34:09,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:09,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174472720] [2023-08-30 02:34:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:09,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:09,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:09,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174472720] [2023-08-30 02:34:09,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174472720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:09,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:09,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221893577] [2023-08-30 02:34:09,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:09,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:09,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:09,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 124 [2023-08-30 02:34:09,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:09,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:09,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 124 [2023-08-30 02:34:09,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:09,957 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-08-30 02:34:09,958 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:09,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 3 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 20. Up to 14 conditions per place. [2023-08-30 02:34:09,959 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2023-08-30 02:34:09,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 7 transitions, 31 flow [2023-08-30 02:34:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-08-30 02:34:09,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220430107526882 [2023-08-30 02:34:09,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-08-30 02:34:09,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-08-30 02:34:09,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:09,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-08-30 02:34:09,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:09,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:09,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:09,980 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 3 states and 157 transitions. [2023-08-30 02:34:09,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 7 transitions, 31 flow [2023-08-30 02:34:09,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:09,983 INFO L231 Difference]: Finished difference. Result has 12 places, 7 transitions, 21 flow [2023-08-30 02:34:09,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2023-08-30 02:34:09,986 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-30 02:34:09,986 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 21 flow [2023-08-30 02:34:09,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:09,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:09,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:34:09,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:34:09,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash 9679, now seen corresponding path program 1 times [2023-08-30 02:34:09,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:09,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966650993] [2023-08-30 02:34:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:09,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:10,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966650993] [2023-08-30 02:34:10,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966650993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:10,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:10,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:10,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739281701] [2023-08-30 02:34:10,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:10,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:10,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 124 [2023-08-30 02:34:10,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:10,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:10,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 124 [2023-08-30 02:34:10,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:10,064 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 02:34:10,064 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:10,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 22. Up to 10 conditions per place. [2023-08-30 02:34:10,065 INFO L137 encePairwiseOnDemand]: 122/124 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-08-30 02:34:10,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 6 transitions, 29 flow [2023-08-30 02:34:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-08-30 02:34:10,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2023-08-30 02:34:10,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-08-30 02:34:10,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-08-30 02:34:10,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:10,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-08-30 02:34:10,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:10,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:10,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:10,069 INFO L175 Difference]: Start difference. First operand has 12 places, 7 transitions, 21 flow. Second operand 3 states and 147 transitions. [2023-08-30 02:34:10,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 6 transitions, 29 flow [2023-08-30 02:34:10,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:34:10,070 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 20 flow [2023-08-30 02:34:10,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-08-30 02:34:10,070 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-30 02:34:10,070 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 20 flow [2023-08-30 02:34:10,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:10,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:10,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 02:34:10,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:34:10,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:34:10,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash 357213265, now seen corresponding path program 1 times [2023-08-30 02:34:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:10,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909033926] [2023-08-30 02:34:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:10,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:34:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:10,102 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:34:10,102 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:34:10,103 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 02:34:10,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-08-30 02:34:10,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-08-30 02:34:10,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-30 02:34:10,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-08-30 02:34:10,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-08-30 02:34:10,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:34:10,105 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 02:34:10,107 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:34:10,107 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 02:34:10,118 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:34:10,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 192 flow [2023-08-30 02:34:10,134 INFO L130 PetriNetUnfolder]: 11/122 cut-off events. [2023-08-30 02:34:10,134 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:34:10,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 122 events. 11/122 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 252 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 76. Up to 6 conditions per place. [2023-08-30 02:34:10,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 90 transitions, 192 flow [2023-08-30 02:34:10,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 90 transitions, 192 flow [2023-08-30 02:34:10,136 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:34:10,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 192 flow [2023-08-30 02:34:10,136 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 90 transitions, 192 flow [2023-08-30 02:34:10,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 192 flow [2023-08-30 02:34:10,165 INFO L130 PetriNetUnfolder]: 11/122 cut-off events. [2023-08-30 02:34:10,165 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:34:10,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 122 events. 11/122 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 252 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 76. Up to 6 conditions per place. [2023-08-30 02:34:10,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 3828 [2023-08-30 02:34:12,163 INFO L134 LiptonReduction]: Checked pairs total: 3628 [2023-08-30 02:34:12,164 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-30 02:34:12,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:34:12,166 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;@7875655b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:34:12,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 02:34:12,167 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:34:12,167 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:12,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:12,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:12,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:34:12,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash 16518, now seen corresponding path program 1 times [2023-08-30 02:34:12,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:12,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212110783] [2023-08-30 02:34:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:12,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:12,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:12,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212110783] [2023-08-30 02:34:12,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212110783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:12,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:12,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:12,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236864571] [2023-08-30 02:34:12,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:12,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:12,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:12,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 187 [2023-08-30 02:34:12,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:12,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 187 [2023-08-30 02:34:12,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:12,268 INFO L130 PetriNetUnfolder]: 34/84 cut-off events. [2023-08-30 02:34:12,268 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 02:34:12,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 84 events. 34/84 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 295 event pairs, 34 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 44. Up to 73 conditions per place. [2023-08-30 02:34:12,269 INFO L137 encePairwiseOnDemand]: 180/187 looper letters, 8 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-30 02:34:12,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 12 transitions, 54 flow [2023-08-30 02:34:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-30 02:34:12,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42245989304812837 [2023-08-30 02:34:12,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-30 02:34:12,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-30 02:34:12,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:12,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-30 02:34:12,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,274 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 50 flow. Second operand 3 states and 237 transitions. [2023-08-30 02:34:12,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 12 transitions, 54 flow [2023-08-30 02:34:12,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 12 transitions, 52 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:12,275 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 36 flow [2023-08-30 02:34:12,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2023-08-30 02:34:12,275 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2023-08-30 02:34:12,275 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 36 flow [2023-08-30 02:34:12,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:12,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:12,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:34:12,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:34:12,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:12,277 INFO L85 PathProgramCache]: Analyzing trace with hash 16517, now seen corresponding path program 1 times [2023-08-30 02:34:12,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:12,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233405875] [2023-08-30 02:34:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:12,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:12,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:12,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233405875] [2023-08-30 02:34:12,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233405875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:12,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:12,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:12,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624599546] [2023-08-30 02:34:12,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:12,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:12,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:12,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:12,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:12,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 187 [2023-08-30 02:34:12,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:12,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 187 [2023-08-30 02:34:12,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:12,324 INFO L130 PetriNetUnfolder]: 20/57 cut-off events. [2023-08-30 02:34:12,324 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:34:12,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 57 events. 20/57 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 159 event pairs, 20 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 115. Up to 46 conditions per place. [2023-08-30 02:34:12,325 INFO L137 encePairwiseOnDemand]: 185/187 looper letters, 7 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-08-30 02:34:12,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 11 transitions, 50 flow [2023-08-30 02:34:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-30 02:34:12,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40106951871657753 [2023-08-30 02:34:12,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-30 02:34:12,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-30 02:34:12,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:12,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-30 02:34:12,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,329 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 36 flow. Second operand 3 states and 225 transitions. [2023-08-30 02:34:12,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 11 transitions, 50 flow [2023-08-30 02:34:12,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 11 transitions, 49 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:34:12,330 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 35 flow [2023-08-30 02:34:12,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=35, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2023-08-30 02:34:12,330 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2023-08-30 02:34:12,331 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 35 flow [2023-08-30 02:34:12,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:12,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:12,331 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 02:34:12,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:34:12,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:34:12,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:12,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1071545629, now seen corresponding path program 1 times [2023-08-30 02:34:12,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:12,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030820395] [2023-08-30 02:34:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:12,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:12,342 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:34:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:12,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:34:12,349 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:34:12,349 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 02:34:12,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-08-30 02:34:12,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 02:34:12,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 02:34:12,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-30 02:34:12,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 02:34:12,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 02:34:12,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:34:12,350 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 02:34:12,351 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:34:12,351 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 02:34:12,363 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:34:12,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 120 transitions, 261 flow [2023-08-30 02:34:12,377 INFO L130 PetriNetUnfolder]: 16/169 cut-off events. [2023-08-30 02:34:12,377 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:34:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 169 events. 16/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 441 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2023-08-30 02:34:12,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 120 transitions, 261 flow [2023-08-30 02:34:12,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 120 transitions, 261 flow [2023-08-30 02:34:12,379 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:34:12,379 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 120 transitions, 261 flow [2023-08-30 02:34:12,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 120 transitions, 261 flow [2023-08-30 02:34:12,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 120 transitions, 261 flow [2023-08-30 02:34:12,403 INFO L130 PetriNetUnfolder]: 16/169 cut-off events. [2023-08-30 02:34:12,403 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:34:12,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 169 events. 16/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 441 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2023-08-30 02:34:12,407 INFO L119 LiptonReduction]: Number of co-enabled transitions 8352 [2023-08-30 02:34:15,066 INFO L134 LiptonReduction]: Checked pairs total: 8287 [2023-08-30 02:34:15,067 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-30 02:34:15,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:34:15,073 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;@7875655b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:34:15,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 02:34:15,074 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 02:34:15,074 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:15,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:15,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:15,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:34:15,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash 25314, now seen corresponding path program 1 times [2023-08-30 02:34:15,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:15,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273073081] [2023-08-30 02:34:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:15,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:15,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:15,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273073081] [2023-08-30 02:34:15,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273073081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:15,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:15,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:15,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245928347] [2023-08-30 02:34:15,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:15,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:15,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:15,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:15,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:15,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 251 [2023-08-30 02:34:15,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:15,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 251 [2023-08-30 02:34:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:15,164 INFO L130 PetriNetUnfolder]: 178/333 cut-off events. [2023-08-30 02:34:15,166 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-30 02:34:15,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 333 events. 178/333 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1493 event pairs, 178 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 181. Up to 298 conditions per place. [2023-08-30 02:34:15,168 INFO L137 encePairwiseOnDemand]: 243/251 looper letters, 11 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-30 02:34:15,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 15 transitions, 75 flow [2023-08-30 02:34:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-30 02:34:15,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196547144754316 [2023-08-30 02:34:15,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-30 02:34:15,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-30 02:34:15,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:15,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-30 02:34:15,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,174 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 3 states and 316 transitions. [2023-08-30 02:34:15,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 15 transitions, 75 flow [2023-08-30 02:34:15,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 15 transitions, 69 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:15,176 INFO L231 Difference]: Finished difference. Result has 24 places, 15 transitions, 47 flow [2023-08-30 02:34:15,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=24, PETRI_TRANSITIONS=15} [2023-08-30 02:34:15,177 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-08-30 02:34:15,177 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 15 transitions, 47 flow [2023-08-30 02:34:15,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:15,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:15,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:34:15,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:34:15,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash 25312, now seen corresponding path program 1 times [2023-08-30 02:34:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:15,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278287851] [2023-08-30 02:34:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:15,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:15,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:15,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278287851] [2023-08-30 02:34:15,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278287851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:15,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:15,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:15,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922135438] [2023-08-30 02:34:15,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:15,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:15,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:15,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:15,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 251 [2023-08-30 02:34:15,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 15 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:15,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 251 [2023-08-30 02:34:15,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:15,270 INFO L130 PetriNetUnfolder]: 110/225 cut-off events. [2023-08-30 02:34:15,271 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-08-30 02:34:15,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 225 events. 110/225 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 899 event pairs, 110 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 460. Up to 190 conditions per place. [2023-08-30 02:34:15,272 INFO L137 encePairwiseOnDemand]: 249/251 looper letters, 10 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2023-08-30 02:34:15,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 14 transitions, 67 flow [2023-08-30 02:34:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-08-30 02:34:15,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40239043824701193 [2023-08-30 02:34:15,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-08-30 02:34:15,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-08-30 02:34:15,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:15,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-08-30 02:34:15,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,276 INFO L175 Difference]: Start difference. First operand has 24 places, 15 transitions, 47 flow. Second operand 3 states and 303 transitions. [2023-08-30 02:34:15,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 14 transitions, 67 flow [2023-08-30 02:34:15,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 14 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:34:15,277 INFO L231 Difference]: Finished difference. Result has 24 places, 14 transitions, 46 flow [2023-08-30 02:34:15,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=24, PETRI_TRANSITIONS=14} [2023-08-30 02:34:15,277 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-08-30 02:34:15,278 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 14 transitions, 46 flow [2023-08-30 02:34:15,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:15,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:15,278 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 02:34:15,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:34:15,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:34:15,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1061430325, now seen corresponding path program 1 times [2023-08-30 02:34:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:15,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095642278] [2023-08-30 02:34:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:15,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:15,292 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:34:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:15,305 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:34:15,306 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:34:15,306 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 02:34:15,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-08-30 02:34:15,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-30 02:34:15,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-30 02:34:15,307 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-30 02:34:15,307 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-30 02:34:15,307 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-08-30 02:34:15,307 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-08-30 02:34:15,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:34:15,307 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 02:34:15,308 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:34:15,309 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 02:34:15,324 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:34:15,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 150 transitions, 332 flow [2023-08-30 02:34:15,345 INFO L130 PetriNetUnfolder]: 21/216 cut-off events. [2023-08-30 02:34:15,345 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:34:15,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 216 events. 21/216 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 626 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 177. Up to 10 conditions per place. [2023-08-30 02:34:15,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 150 transitions, 332 flow [2023-08-30 02:34:15,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 150 transitions, 332 flow [2023-08-30 02:34:15,348 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:34:15,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 150 transitions, 332 flow [2023-08-30 02:34:15,349 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 150 transitions, 332 flow [2023-08-30 02:34:15,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 150 transitions, 332 flow [2023-08-30 02:34:15,364 INFO L130 PetriNetUnfolder]: 21/216 cut-off events. [2023-08-30 02:34:15,365 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:34:15,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 216 events. 21/216 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 626 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 177. Up to 10 conditions per place. [2023-08-30 02:34:15,371 INFO L119 LiptonReduction]: Number of co-enabled transitions 14616 [2023-08-30 02:34:18,461 INFO L134 LiptonReduction]: Checked pairs total: 14139 [2023-08-30 02:34:18,461 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-30 02:34:18,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:34:18,463 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;@7875655b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:34:18,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 02:34:18,463 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:34:18,463 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:18,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:18,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:18,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:34:18,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash 36367, now seen corresponding path program 1 times [2023-08-30 02:34:18,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:18,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325116904] [2023-08-30 02:34:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:18,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:18,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325116904] [2023-08-30 02:34:18,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325116904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:18,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:18,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:18,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427626884] [2023-08-30 02:34:18,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:18,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:18,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:18,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 318 [2023-08-30 02:34:18,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:18,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 318 [2023-08-30 02:34:18,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:18,608 INFO L130 PetriNetUnfolder]: 772/1242 cut-off events. [2023-08-30 02:34:18,609 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2023-08-30 02:34:18,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2673 conditions, 1242 events. 772/1242 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6168 event pairs, 772 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 727. Up to 1135 conditions per place. [2023-08-30 02:34:18,613 INFO L137 encePairwiseOnDemand]: 309/318 looper letters, 14 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-30 02:34:18,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 18 transitions, 98 flow [2023-08-30 02:34:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-30 02:34:18,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140461215932914 [2023-08-30 02:34:18,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-30 02:34:18,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-30 02:34:18,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:18,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-30 02:34:18,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,618 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 86 flow. Second operand 3 states and 395 transitions. [2023-08-30 02:34:18,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 18 transitions, 98 flow [2023-08-30 02:34:18,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 18 transitions, 86 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:18,620 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 58 flow [2023-08-30 02:34:18,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-30 02:34:18,622 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -6 predicate places. [2023-08-30 02:34:18,622 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 58 flow [2023-08-30 02:34:18,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:18,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:18,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:34:18,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:34:18,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash 36369, now seen corresponding path program 1 times [2023-08-30 02:34:18,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:18,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917670639] [2023-08-30 02:34:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:18,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917670639] [2023-08-30 02:34:18,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917670639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:18,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:18,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:18,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835293469] [2023-08-30 02:34:18,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:18,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:18,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:18,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 318 [2023-08-30 02:34:18,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:18,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 318 [2023-08-30 02:34:18,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:18,736 INFO L130 PetriNetUnfolder]: 488/837 cut-off events. [2023-08-30 02:34:18,737 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-08-30 02:34:18,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 837 events. 488/837 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3897 event pairs, 488 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 1711. Up to 730 conditions per place. [2023-08-30 02:34:18,740 INFO L137 encePairwiseOnDemand]: 316/318 looper letters, 13 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-30 02:34:18,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 17 transitions, 84 flow [2023-08-30 02:34:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-30 02:34:18,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39937106918238996 [2023-08-30 02:34:18,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-30 02:34:18,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-30 02:34:18,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:18,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-30 02:34:18,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,744 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 58 flow. Second operand 3 states and 381 transitions. [2023-08-30 02:34:18,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 17 transitions, 84 flow [2023-08-30 02:34:18,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 17 transitions, 83 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:34:18,745 INFO L231 Difference]: Finished difference. Result has 29 places, 17 transitions, 57 flow [2023-08-30 02:34:18,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2023-08-30 02:34:18,746 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -6 predicate places. [2023-08-30 02:34:18,747 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 57 flow [2023-08-30 02:34:18,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:18,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:18,747 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 02:34:18,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:34:18,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:34:18,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:18,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1307431076, now seen corresponding path program 1 times [2023-08-30 02:34:18,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:18,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465231154] [2023-08-30 02:34:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:18,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:18,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:34:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:18,773 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:34:18,773 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:34:18,773 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-30 02:34:18,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-08-30 02:34:18,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-30 02:34:18,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-30 02:34:18,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-08-30 02:34:18,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-30 02:34:18,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-08-30 02:34:18,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-08-30 02:34:18,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-30 02:34:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:34:18,775 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 02:34:18,776 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:34:18,776 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 02:34:18,795 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:34:18,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 180 transitions, 405 flow [2023-08-30 02:34:18,814 INFO L130 PetriNetUnfolder]: 26/263 cut-off events. [2023-08-30 02:34:18,814 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 02:34:18,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 263 events. 26/263 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 830 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 229. Up to 12 conditions per place. [2023-08-30 02:34:18,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 180 transitions, 405 flow [2023-08-30 02:34:18,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 180 transitions, 405 flow [2023-08-30 02:34:18,818 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:34:18,818 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 180 transitions, 405 flow [2023-08-30 02:34:18,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 180 transitions, 405 flow [2023-08-30 02:34:18,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 180 transitions, 405 flow [2023-08-30 02:34:18,835 INFO L130 PetriNetUnfolder]: 26/263 cut-off events. [2023-08-30 02:34:18,835 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 02:34:18,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 263 events. 26/263 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 830 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 229. Up to 12 conditions per place. [2023-08-30 02:34:18,844 INFO L119 LiptonReduction]: Number of co-enabled transitions 22620 [2023-08-30 02:34:22,480 INFO L134 LiptonReduction]: Checked pairs total: 22178 [2023-08-30 02:34:22,481 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-30 02:34:22,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:34:22,482 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;@7875655b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:34:22,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 02:34:22,483 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 02:34:22,483 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:22,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:22,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:22,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:34:22,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash 49302, now seen corresponding path program 1 times [2023-08-30 02:34:22,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:22,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079273334] [2023-08-30 02:34:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:22,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:22,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:22,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079273334] [2023-08-30 02:34:22,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079273334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:22,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:22,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230190258] [2023-08-30 02:34:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:22,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:34:22,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:34:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:34:22,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 382 [2023-08-30 02:34:22,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 107 flow. Second operand has 2 states, 2 states have (on average 154.0) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:22,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:22,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 382 [2023-08-30 02:34:22,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:22,948 INFO L130 PetriNetUnfolder]: 4134/5913 cut-off events. [2023-08-30 02:34:22,948 INFO L131 PetriNetUnfolder]: For 2176/2176 co-relation queries the response was YES. [2023-08-30 02:34:22,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12583 conditions, 5913 events. 4134/5913 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 31963 event pairs, 4134 based on Foata normal form. 0/5064 useless extension candidates. Maximal degree in co-relation 3544. Up to 5591 conditions per place. [2023-08-30 02:34:22,970 INFO L137 encePairwiseOnDemand]: 374/382 looper letters, 19 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2023-08-30 02:34:22,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 22 transitions, 127 flow [2023-08-30 02:34:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:34:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:34:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2023-08-30 02:34:22,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43586387434554974 [2023-08-30 02:34:22,972 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2023-08-30 02:34:22,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2023-08-30 02:34:22,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:22,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2023-08-30 02:34:22,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:22,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:22,974 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:22,974 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 107 flow. Second operand 2 states and 333 transitions. [2023-08-30 02:34:22,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 22 transitions, 127 flow [2023-08-30 02:34:22,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 22 transitions, 107 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:22,977 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 69 flow [2023-08-30 02:34:22,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=69, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2023-08-30 02:34:22,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-30 02:34:22,978 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 69 flow [2023-08-30 02:34:22,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 154.0) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:22,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:22,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:22,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:34:22,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:34:22,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:22,979 INFO L85 PathProgramCache]: Analyzing trace with hash 49282, now seen corresponding path program 1 times [2023-08-30 02:34:22,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:22,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136137798] [2023-08-30 02:34:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:22,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:23,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:23,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136137798] [2023-08-30 02:34:23,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136137798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:23,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:23,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:23,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486120827] [2023-08-30 02:34:23,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:23,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:23,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:23,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 382 [2023-08-30 02:34:23,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:23,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 382 [2023-08-30 02:34:23,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:23,397 INFO L130 PetriNetUnfolder]: 3040/4455 cut-off events. [2023-08-30 02:34:23,397 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-08-30 02:34:23,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9038 conditions, 4455 events. 3040/4455 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23585 event pairs, 3040 based on Foata normal form. 0/3970 useless extension candidates. Maximal degree in co-relation 9030. Up to 4132 conditions per place. [2023-08-30 02:34:23,418 INFO L137 encePairwiseOnDemand]: 380/382 looper letters, 17 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-30 02:34:23,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 21 transitions, 103 flow [2023-08-30 02:34:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-30 02:34:23,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4040139616055846 [2023-08-30 02:34:23,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-30 02:34:23,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-30 02:34:23,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:23,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-30 02:34:23,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,424 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 69 flow. Second operand 3 states and 463 transitions. [2023-08-30 02:34:23,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 21 transitions, 103 flow [2023-08-30 02:34:23,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 21 transitions, 103 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:23,426 INFO L231 Difference]: Finished difference. Result has 35 places, 21 transitions, 69 flow [2023-08-30 02:34:23,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=35, PETRI_TRANSITIONS=21} [2023-08-30 02:34:23,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-08-30 02:34:23,428 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 21 transitions, 69 flow [2023-08-30 02:34:23,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:23,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:23,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:34:23,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:34:23,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash 49284, now seen corresponding path program 1 times [2023-08-30 02:34:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420536314] [2023-08-30 02:34:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:23,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:23,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420536314] [2023-08-30 02:34:23,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420536314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:23,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:23,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:23,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189942508] [2023-08-30 02:34:23,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:23,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:23,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:23,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:23,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:23,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 382 [2023-08-30 02:34:23,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 21 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:23,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 382 [2023-08-30 02:34:23,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:23,718 INFO L130 PetriNetUnfolder]: 1946/2997 cut-off events. [2023-08-30 02:34:23,718 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-08-30 02:34:23,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6124 conditions, 2997 events. 1946/2997 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15415 event pairs, 1946 based on Foata normal form. 0/2876 useless extension candidates. Maximal degree in co-relation 6115. Up to 2674 conditions per place. [2023-08-30 02:34:23,731 INFO L137 encePairwiseOnDemand]: 380/382 looper letters, 16 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-30 02:34:23,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 20 transitions, 101 flow [2023-08-30 02:34:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-30 02:34:23,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005235602094241 [2023-08-30 02:34:23,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-30 02:34:23,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-30 02:34:23,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:23,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-30 02:34:23,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,736 INFO L175 Difference]: Start difference. First operand has 35 places, 21 transitions, 69 flow. Second operand 3 states and 459 transitions. [2023-08-30 02:34:23,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 20 transitions, 101 flow [2023-08-30 02:34:23,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 20 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:34:23,738 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 68 flow [2023-08-30 02:34:23,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2023-08-30 02:34:23,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-08-30 02:34:23,739 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 68 flow [2023-08-30 02:34:23,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:23,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:23,739 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:34:23,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:34:23,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 02:34:23,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:23,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1041726554, now seen corresponding path program 1 times [2023-08-30 02:34:23,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:23,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949905445] [2023-08-30 02:34:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:23,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:23,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:34:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:23,775 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:34:23,777 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:34:23,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-30 02:34:23,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-08-30 02:34:23,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-30 02:34:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-30 02:34:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-08-30 02:34:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-08-30 02:34:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-30 02:34:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-08-30 02:34:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-08-30 02:34:23,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-08-30 02:34:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:34:23,779 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 02:34:23,779 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:34:23,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 02:34:23,793 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:34:23,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 210 transitions, 480 flow [2023-08-30 02:34:23,817 INFO L130 PetriNetUnfolder]: 31/310 cut-off events. [2023-08-30 02:34:23,817 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 02:34:23,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 310 events. 31/310 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 976 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 284. Up to 14 conditions per place. [2023-08-30 02:34:23,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 210 transitions, 480 flow [2023-08-30 02:34:23,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 210 transitions, 480 flow [2023-08-30 02:34:23,820 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:34:23,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 210 transitions, 480 flow [2023-08-30 02:34:23,820 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 210 transitions, 480 flow [2023-08-30 02:34:23,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 210 transitions, 480 flow [2023-08-30 02:34:23,844 INFO L130 PetriNetUnfolder]: 31/310 cut-off events. [2023-08-30 02:34:23,845 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 02:34:23,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 310 events. 31/310 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 976 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 284. Up to 14 conditions per place. [2023-08-30 02:34:23,852 INFO L119 LiptonReduction]: Number of co-enabled transitions 32364 [2023-08-30 02:34:28,167 INFO L134 LiptonReduction]: Checked pairs total: 29501 [2023-08-30 02:34:28,167 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-08-30 02:34:28,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:34:28,168 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;@7875655b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:34:28,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 02:34:28,169 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:34:28,169 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:28,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:28,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:28,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:34:28,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash 64397, now seen corresponding path program 1 times [2023-08-30 02:34:28,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:28,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040934573] [2023-08-30 02:34:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:28,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:28,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:28,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040934573] [2023-08-30 02:34:28,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040934573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:28,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:28,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:28,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758109944] [2023-08-30 02:34:28,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:28,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:34:28,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:28,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:34:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:34:28,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 440 [2023-08-30 02:34:28,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 130 flow. Second operand has 2 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:28,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:28,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 440 [2023-08-30 02:34:28,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:29,717 INFO L130 PetriNetUnfolder]: 15312/20655 cut-off events. [2023-08-30 02:34:29,717 INFO L131 PetriNetUnfolder]: For 9628/9628 co-relation queries the response was YES. [2023-08-30 02:34:29,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44174 conditions, 20655 events. 15312/20655 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 115319 event pairs, 15312 based on Foata normal form. 0/18105 useless extension candidates. Maximal degree in co-relation 12778. Up to 19685 conditions per place. [2023-08-30 02:34:29,876 INFO L137 encePairwiseOnDemand]: 431/440 looper letters, 22 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-08-30 02:34:29,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 25 transitions, 154 flow [2023-08-30 02:34:29,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:34:29,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:34:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 387 transitions. [2023-08-30 02:34:29,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43977272727272726 [2023-08-30 02:34:29,878 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 387 transitions. [2023-08-30 02:34:29,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 387 transitions. [2023-08-30 02:34:29,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:29,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 387 transitions. [2023-08-30 02:34:29,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 193.5) internal successors, (387), 2 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:29,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 440.0) internal successors, (1320), 3 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:29,881 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 440.0) internal successors, (1320), 3 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:29,881 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 130 flow. Second operand 2 states and 387 transitions. [2023-08-30 02:34:29,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 25 transitions, 154 flow [2023-08-30 02:34:29,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 25 transitions, 124 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:29,889 INFO L231 Difference]: Finished difference. Result has 39 places, 25 transitions, 80 flow [2023-08-30 02:34:29,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=2, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=25} [2023-08-30 02:34:29,890 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -8 predicate places. [2023-08-30 02:34:29,890 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 25 transitions, 80 flow [2023-08-30 02:34:29,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:29,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:29,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:29,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:34:29,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:34:29,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:29,891 INFO L85 PathProgramCache]: Analyzing trace with hash 64381, now seen corresponding path program 1 times [2023-08-30 02:34:29,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:29,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863619395] [2023-08-30 02:34:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:29,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:29,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:29,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863619395] [2023-08-30 02:34:29,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863619395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:29,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:29,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:29,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766168256] [2023-08-30 02:34:29,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:29,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:29,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:29,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 440 [2023-08-30 02:34:29,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 25 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:29,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:29,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 440 [2023-08-30 02:34:29,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:31,077 INFO L130 PetriNetUnfolder]: 11302/15552 cut-off events. [2023-08-30 02:34:31,078 INFO L131 PetriNetUnfolder]: For 847/847 co-relation queries the response was YES. [2023-08-30 02:34:31,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31476 conditions, 15552 events. 11302/15552 cut-off events. For 847/847 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 85980 event pairs, 11302 based on Foata normal form. 0/14095 useless extension candidates. Maximal degree in co-relation 31467. Up to 14581 conditions per place. [2023-08-30 02:34:31,142 INFO L137 encePairwiseOnDemand]: 438/440 looper letters, 20 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-30 02:34:31,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 24 transitions, 120 flow [2023-08-30 02:34:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-08-30 02:34:31,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121212121212121 [2023-08-30 02:34:31,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-08-30 02:34:31,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-08-30 02:34:31,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:31,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-08-30 02:34:31,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:31,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:31,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:31,148 INFO L175 Difference]: Start difference. First operand has 39 places, 25 transitions, 80 flow. Second operand 3 states and 544 transitions. [2023-08-30 02:34:31,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 24 transitions, 120 flow [2023-08-30 02:34:31,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 24 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:31,149 INFO L231 Difference]: Finished difference. Result has 40 places, 24 transitions, 80 flow [2023-08-30 02:34:31,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=40, PETRI_TRANSITIONS=24} [2023-08-30 02:34:31,150 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2023-08-30 02:34:31,150 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 24 transitions, 80 flow [2023-08-30 02:34:31,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:31,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:31,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:31,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:34:31,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:34:31,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:31,152 INFO L85 PathProgramCache]: Analyzing trace with hash 64379, now seen corresponding path program 1 times [2023-08-30 02:34:31,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:31,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340370724] [2023-08-30 02:34:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:31,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:31,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:31,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340370724] [2023-08-30 02:34:31,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340370724] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:31,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:31,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321257824] [2023-08-30 02:34:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:31,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 440 [2023-08-30 02:34:31,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 24 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:31,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:31,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 440 [2023-08-30 02:34:31,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:32,008 INFO L130 PetriNetUnfolder]: 7292/10449 cut-off events. [2023-08-30 02:34:32,008 INFO L131 PetriNetUnfolder]: For 847/847 co-relation queries the response was YES. [2023-08-30 02:34:32,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21272 conditions, 10449 events. 7292/10449 cut-off events. For 847/847 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57367 event pairs, 7292 based on Foata normal form. 0/10085 useless extension candidates. Maximal degree in co-relation 21262. Up to 9478 conditions per place. [2023-08-30 02:34:32,049 INFO L137 encePairwiseOnDemand]: 438/440 looper letters, 19 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-30 02:34:32,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 23 transitions, 118 flow [2023-08-30 02:34:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-30 02:34:32,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2023-08-30 02:34:32,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-30 02:34:32,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-30 02:34:32,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:32,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-30 02:34:32,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 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) [2023-08-30 02:34:32,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:32,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:32,054 INFO L175 Difference]: Start difference. First operand has 40 places, 24 transitions, 80 flow. Second operand 3 states and 537 transitions. [2023-08-30 02:34:32,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 23 transitions, 118 flow [2023-08-30 02:34:32,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 23 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:34:32,056 INFO L231 Difference]: Finished difference. Result has 40 places, 23 transitions, 79 flow [2023-08-30 02:34:32,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=40, PETRI_TRANSITIONS=23} [2023-08-30 02:34:32,057 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2023-08-30 02:34:32,057 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 23 transitions, 79 flow [2023-08-30 02:34:32,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:32,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:32,058 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:34:32,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:34:32,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 02:34:32,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:32,058 INFO L85 PathProgramCache]: Analyzing trace with hash -820972917, now seen corresponding path program 1 times [2023-08-30 02:34:32,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:32,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924948957] [2023-08-30 02:34:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:32,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:32,069 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:34:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:32,076 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:34:32,076 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:34:32,077 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 02:34:32,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 11 remaining) [2023-08-30 02:34:32,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-30 02:34:32,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-30 02:34:32,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2023-08-30 02:34:32,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 11 remaining) [2023-08-30 02:34:32,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-08-30 02:34:32,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2023-08-30 02:34:32,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2023-08-30 02:34:32,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2023-08-30 02:34:32,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-08-30 02:34:32,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:34:32,078 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 02:34:32,079 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:34:32,079 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-30 02:34:32,117 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:34:32,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 240 transitions, 557 flow [2023-08-30 02:34:32,148 INFO L130 PetriNetUnfolder]: 36/357 cut-off events. [2023-08-30 02:34:32,149 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 02:34:32,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 357 events. 36/357 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1162 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 340. Up to 16 conditions per place. [2023-08-30 02:34:32,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 240 transitions, 557 flow [2023-08-30 02:34:32,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 240 transitions, 557 flow [2023-08-30 02:34:32,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:34:32,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 240 transitions, 557 flow [2023-08-30 02:34:32,156 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 240 transitions, 557 flow [2023-08-30 02:34:32,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 240 transitions, 557 flow [2023-08-30 02:34:32,184 INFO L130 PetriNetUnfolder]: 36/357 cut-off events. [2023-08-30 02:34:32,185 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 02:34:32,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 357 events. 36/357 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1162 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 340. Up to 16 conditions per place. [2023-08-30 02:34:32,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 43848 [2023-08-30 02:34:37,247 INFO L134 LiptonReduction]: Checked pairs total: 41753 [2023-08-30 02:34:37,247 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-08-30 02:34:37,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:34:37,248 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;@7875655b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:34:37,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 02:34:37,249 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:34:37,249 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:37,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:37,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:37,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:34:37,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:37,249 INFO L85 PathProgramCache]: Analyzing trace with hash 81465, now seen corresponding path program 1 times [2023-08-30 02:34:37,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:37,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614159557] [2023-08-30 02:34:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:37,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:37,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:37,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614159557] [2023-08-30 02:34:37,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614159557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:37,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:37,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:37,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13160112] [2023-08-30 02:34:37,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:37,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:34:37,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:34:37,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:34:37,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 507 [2023-08-30 02:34:37,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 151 flow. Second operand has 2 states, 2 states have (on average 204.0) internal successors, (408), 2 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:37,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:37,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 507 [2023-08-30 02:34:37,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:42,816 INFO L130 PetriNetUnfolder]: 54678/70713 cut-off events. [2023-08-30 02:34:42,816 INFO L131 PetriNetUnfolder]: For 40003/40003 co-relation queries the response was YES. [2023-08-30 02:34:42,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151824 conditions, 70713 events. 54678/70713 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 3081. Compared 404672 event pairs, 54678 based on Foata normal form. 0/63060 useless extension candidates. Maximal degree in co-relation 44773. Up to 67799 conditions per place. [2023-08-30 02:34:43,112 INFO L137 encePairwiseOnDemand]: 498/507 looper letters, 25 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-08-30 02:34:43,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 28 transitions, 183 flow [2023-08-30 02:34:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:34:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:34:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 440 transitions. [2023-08-30 02:34:43,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339250493096647 [2023-08-30 02:34:43,114 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 440 transitions. [2023-08-30 02:34:43,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 440 transitions. [2023-08-30 02:34:43,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:43,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 440 transitions. [2023-08-30 02:34:43,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 220.0) internal successors, (440), 2 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:43,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:43,117 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:43,117 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 151 flow. Second operand 2 states and 440 transitions. [2023-08-30 02:34:43,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 28 transitions, 183 flow [2023-08-30 02:34:43,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 28 transitions, 141 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:43,147 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 91 flow [2023-08-30 02:34:43,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=91, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2023-08-30 02:34:43,148 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-30 02:34:43,148 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 91 flow [2023-08-30 02:34:43,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 204.0) internal successors, (408), 2 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:43,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:43,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:43,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 02:34:43,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:34:43,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:43,149 INFO L85 PathProgramCache]: Analyzing trace with hash 81510, now seen corresponding path program 1 times [2023-08-30 02:34:43,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:43,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641193347] [2023-08-30 02:34:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:43,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:43,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:43,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641193347] [2023-08-30 02:34:43,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641193347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:43,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:43,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:43,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403756391] [2023-08-30 02:34:43,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:43,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:43,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:43,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 507 [2023-08-30 02:34:43,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:43,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:43,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 507 [2023-08-30 02:34:43,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:47,229 INFO L130 PetriNetUnfolder]: 40462/53217 cut-off events. [2023-08-30 02:34:47,229 INFO L131 PetriNetUnfolder]: For 2548/2548 co-relation queries the response was YES. [2023-08-30 02:34:47,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107536 conditions, 53217 events. 40462/53217 cut-off events. For 2548/2548 co-relation queries the response was YES. Maximal size of possible extension queue 2241. Compared 303377 event pairs, 40462 based on Foata normal form. 0/48844 useless extension candidates. Maximal degree in co-relation 107526. Up to 50302 conditions per place. [2023-08-30 02:34:47,451 INFO L137 encePairwiseOnDemand]: 505/507 looper letters, 23 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-30 02:34:47,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 27 transitions, 137 flow [2023-08-30 02:34:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-30 02:34:47,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4089414858645628 [2023-08-30 02:34:47,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-30 02:34:47,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-30 02:34:47,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:47,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-30 02:34:47,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:47,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:47,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:47,457 INFO L175 Difference]: Start difference. First operand has 44 places, 28 transitions, 91 flow. Second operand 3 states and 622 transitions. [2023-08-30 02:34:47,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 27 transitions, 137 flow [2023-08-30 02:34:47,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 27 transitions, 137 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:34:47,458 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 91 flow [2023-08-30 02:34:47,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-30 02:34:47,459 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-30 02:34:47,459 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 91 flow [2023-08-30 02:34:47,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:47,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:47,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:47,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 02:34:47,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:34:47,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash 81509, now seen corresponding path program 1 times [2023-08-30 02:34:47,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:47,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872047907] [2023-08-30 02:34:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:47,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:47,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872047907] [2023-08-30 02:34:47,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872047907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:47,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:47,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026144639] [2023-08-30 02:34:47,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:47,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:34:47,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:34:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:34:47,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 507 [2023-08-30 02:34:47,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:47,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:47,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 507 [2023-08-30 02:34:47,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:34:50,251 INFO L130 PetriNetUnfolder]: 26246/35721 cut-off events. [2023-08-30 02:34:50,251 INFO L131 PetriNetUnfolder]: For 2548/2548 co-relation queries the response was YES. [2023-08-30 02:34:50,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72546 conditions, 35721 events. 26246/35721 cut-off events. For 2548/2548 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 205650 event pairs, 26246 based on Foata normal form. 0/34628 useless extension candidates. Maximal degree in co-relation 72535. Up to 32806 conditions per place. [2023-08-30 02:34:50,399 INFO L137 encePairwiseOnDemand]: 505/507 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 02:34:50,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 26 transitions, 135 flow [2023-08-30 02:34:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:34:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:34:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-30 02:34:50,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40433925049309666 [2023-08-30 02:34:50,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-30 02:34:50,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-30 02:34:50,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:34:50,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-30 02:34:50,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:50,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:50,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:50,404 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 91 flow. Second operand 3 states and 615 transitions. [2023-08-30 02:34:50,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 26 transitions, 135 flow [2023-08-30 02:34:50,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 26 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:34:50,429 INFO L231 Difference]: Finished difference. Result has 45 places, 26 transitions, 90 flow [2023-08-30 02:34:50,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=45, PETRI_TRANSITIONS=26} [2023-08-30 02:34:50,429 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-30 02:34:50,429 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 90 flow [2023-08-30 02:34:50,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:50,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:50,430 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:34:50,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 02:34:50,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 02:34:50,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1292634471, now seen corresponding path program 1 times [2023-08-30 02:34:50,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:50,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841823378] [2023-08-30 02:34:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:50,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:34:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:34:50,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:34:50,447 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:34:50,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 12 remaining) [2023-08-30 02:34:50,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (10 of 12 remaining) [2023-08-30 02:34:50,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-08-30 02:34:50,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-30 02:34:50,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (7 of 12 remaining) [2023-08-30 02:34:50,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 12 remaining) [2023-08-30 02:34:50,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 12 remaining) [2023-08-30 02:34:50,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 12 remaining) [2023-08-30 02:34:50,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-08-30 02:34:50,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-08-30 02:34:50,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 12 remaining) [2023-08-30 02:34:50,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 12 remaining) [2023-08-30 02:34:50,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 02:34:50,449 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 02:34:50,449 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:34:50,450 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-30 02:34:50,467 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:34:50,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 270 transitions, 636 flow [2023-08-30 02:34:50,504 INFO L130 PetriNetUnfolder]: 41/404 cut-off events. [2023-08-30 02:34:50,504 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 02:34:50,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 404 events. 41/404 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1358 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 397. Up to 18 conditions per place. [2023-08-30 02:34:50,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 270 transitions, 636 flow [2023-08-30 02:34:50,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 270 transitions, 636 flow [2023-08-30 02:34:50,510 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:34:50,510 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 270 transitions, 636 flow [2023-08-30 02:34:50,510 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 270 transitions, 636 flow [2023-08-30 02:34:50,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 270 transitions, 636 flow [2023-08-30 02:34:50,544 INFO L130 PetriNetUnfolder]: 41/404 cut-off events. [2023-08-30 02:34:50,545 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 02:34:50,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 404 events. 41/404 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1358 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 397. Up to 18 conditions per place. [2023-08-30 02:34:50,560 INFO L119 LiptonReduction]: Number of co-enabled transitions 57072 [2023-08-30 02:34:56,153 INFO L134 LiptonReduction]: Checked pairs total: 54463 [2023-08-30 02:34:56,154 INFO L136 LiptonReduction]: Total number of compositions: 299 [2023-08-30 02:34:56,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:34:56,155 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;@7875655b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:34:56,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-30 02:34:56,155 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:34:56,155 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:34:56,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:34:56,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:34:56,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:34:56,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:34:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash 100571, now seen corresponding path program 1 times [2023-08-30 02:34:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:34:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280039264] [2023-08-30 02:34:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:34:56,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:34:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:34:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:34:56,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:34:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280039264] [2023-08-30 02:34:56,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280039264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:34:56,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:34:56,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:34:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058925325] [2023-08-30 02:34:56,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:34:56,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:34:56,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:34:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:34:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:34:56,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 569 [2023-08-30 02:34:56,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 178 flow. Second operand has 2 states, 2 states have (on average 229.0) internal successors, (458), 2 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:34:56,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:34:56,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 569 [2023-08-30 02:34:56,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:15,909 INFO L130 PetriNetUnfolder]: 190272/238383 cut-off events. [2023-08-30 02:35:15,913 INFO L131 PetriNetUnfolder]: For 158830/158830 co-relation queries the response was YES. [2023-08-30 02:35:16,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513409 conditions, 238383 events. 190272/238383 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 8584. Compared 1381708 event pairs, 190272 based on Foata normal form. 0/215421 useless extension candidates. Maximal degree in co-relation 153637. Up to 229637 conditions per place. [2023-08-30 02:35:17,078 INFO L137 encePairwiseOnDemand]: 559/569 looper letters, 28 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-08-30 02:35:17,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 31 transitions, 214 flow [2023-08-30 02:35:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:35:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:35:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 494 transitions. [2023-08-30 02:35:17,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43409490333919154 [2023-08-30 02:35:17,080 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 494 transitions. [2023-08-30 02:35:17,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 494 transitions. [2023-08-30 02:35:17,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:17,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 494 transitions. [2023-08-30 02:35:17,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 247.0) internal successors, (494), 2 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:17,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 569.0) internal successors, (1707), 3 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:17,244 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 569.0) internal successors, (1707), 3 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:17,244 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 178 flow. Second operand 2 states and 494 transitions. [2023-08-30 02:35:17,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 31 transitions, 214 flow [2023-08-30 02:35:17,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 31 transitions, 158 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-08-30 02:35:17,314 INFO L231 Difference]: Finished difference. Result has 49 places, 31 transitions, 102 flow [2023-08-30 02:35:17,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=49, PETRI_TRANSITIONS=31} [2023-08-30 02:35:17,315 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -9 predicate places. [2023-08-30 02:35:17,315 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 31 transitions, 102 flow [2023-08-30 02:35:17,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 229.0) internal successors, (458), 2 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:17,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:17,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:35:17,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 02:35:17,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:35:17,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:17,316 INFO L85 PathProgramCache]: Analyzing trace with hash 100615, now seen corresponding path program 1 times [2023-08-30 02:35:17,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:17,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981702429] [2023-08-30 02:35:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:35:17,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:17,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981702429] [2023-08-30 02:35:17,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981702429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:17,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:17,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:17,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059431991] [2023-08-30 02:35:17,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:17,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:17,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:17,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:17,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:17,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 569 [2023-08-30 02:35:17,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 31 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:17,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:17,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 569 [2023-08-30 02:35:17,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:31,622 INFO L130 PetriNetUnfolder]: 141064/179334 cut-off events. [2023-08-30 02:35:31,623 INFO L131 PetriNetUnfolder]: For 7651/7651 co-relation queries the response was YES. [2023-08-30 02:35:32,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361958 conditions, 179334 events. 141064/179334 cut-off events. For 7651/7651 co-relation queries the response was YES. Maximal size of possible extension queue 6315. Compared 1047644 event pairs, 141064 based on Foata normal form. 0/166213 useless extension candidates. Maximal degree in co-relation 361947. Up to 170587 conditions per place. [2023-08-30 02:35:32,538 INFO L137 encePairwiseOnDemand]: 567/569 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 02:35:32,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 30 transitions, 154 flow [2023-08-30 02:35:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2023-08-30 02:35:32,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065612185120094 [2023-08-30 02:35:32,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2023-08-30 02:35:32,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2023-08-30 02:35:32,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:32,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2023-08-30 02:35:32,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:32,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:32,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:32,543 INFO L175 Difference]: Start difference. First operand has 49 places, 31 transitions, 102 flow. Second operand 3 states and 694 transitions. [2023-08-30 02:35:32,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 30 transitions, 154 flow [2023-08-30 02:35:32,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 30 transitions, 154 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:35:32,544 INFO L231 Difference]: Finished difference. Result has 50 places, 30 transitions, 102 flow [2023-08-30 02:35:32,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=50, PETRI_TRANSITIONS=30} [2023-08-30 02:35:32,545 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -8 predicate places. [2023-08-30 02:35:32,545 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 30 transitions, 102 flow [2023-08-30 02:35:32,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:32,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:32,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:35:32,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 02:35:32,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:35:32,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:32,546 INFO L85 PathProgramCache]: Analyzing trace with hash 100616, now seen corresponding path program 1 times [2023-08-30 02:35:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:32,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380431226] [2023-08-30 02:35:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:32,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:35:32,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:32,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380431226] [2023-08-30 02:35:32,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380431226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:32,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:32,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:32,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674516915] [2023-08-30 02:35:32,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:32,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:35:32,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:35:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:35:32,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 569 [2023-08-30 02:35:32,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 30 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:32,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:32,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 569 [2023-08-30 02:35:32,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:35:42,092 INFO L130 PetriNetUnfolder]: 91856/120285 cut-off events. [2023-08-30 02:35:42,092 INFO L131 PetriNetUnfolder]: For 7651/7651 co-relation queries the response was YES. [2023-08-30 02:35:42,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243862 conditions, 120285 events. 91856/120285 cut-off events. For 7651/7651 co-relation queries the response was YES. Maximal size of possible extension queue 4108. Compared 717175 event pairs, 91856 based on Foata normal form. 0/117005 useless extension candidates. Maximal degree in co-relation 243850. Up to 111538 conditions per place. [2023-08-30 02:35:42,713 INFO L137 encePairwiseOnDemand]: 567/569 looper letters, 25 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 02:35:42,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 29 transitions, 152 flow [2023-08-30 02:35:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:35:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:35:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-30 02:35:42,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094903339191564 [2023-08-30 02:35:42,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-30 02:35:42,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-30 02:35:42,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:35:42,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-30 02:35:42,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:42,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:42,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 569.0) internal successors, (2276), 4 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:42,719 INFO L175 Difference]: Start difference. First operand has 50 places, 30 transitions, 102 flow. Second operand 3 states and 699 transitions. [2023-08-30 02:35:42,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 29 transitions, 152 flow [2023-08-30 02:35:42,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 29 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:35:42,731 INFO L231 Difference]: Finished difference. Result has 50 places, 29 transitions, 101 flow [2023-08-30 02:35:42,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=569, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=50, PETRI_TRANSITIONS=29} [2023-08-30 02:35:42,731 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -8 predicate places. [2023-08-30 02:35:42,731 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 101 flow [2023-08-30 02:35:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:42,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:42,732 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:35:42,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 02:35:42,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-30 02:35:42,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1096958905, now seen corresponding path program 1 times [2023-08-30 02:35:42,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:42,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207772188] [2023-08-30 02:35:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:35:42,743 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:35:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:35:42,750 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:35:42,751 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:35:42,751 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-08-30 02:35:42,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (11 of 13 remaining) [2023-08-30 02:35:42,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-08-30 02:35:42,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-08-30 02:35:42,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 13 remaining) [2023-08-30 02:35:42,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 13 remaining) [2023-08-30 02:35:42,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-08-30 02:35:42,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 13 remaining) [2023-08-30 02:35:42,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 13 remaining) [2023-08-30 02:35:42,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2023-08-30 02:35:42,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2023-08-30 02:35:42,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 13 remaining) [2023-08-30 02:35:42,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-08-30 02:35:42,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 02:35:42,753 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 02:35:42,753 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:35:42,753 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-30 02:35:42,772 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:35:42,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 300 transitions, 717 flow [2023-08-30 02:35:42,814 INFO L130 PetriNetUnfolder]: 46/451 cut-off events. [2023-08-30 02:35:42,814 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 02:35:42,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 451 events. 46/451 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1548 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 455. Up to 20 conditions per place. [2023-08-30 02:35:42,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 300 transitions, 717 flow [2023-08-30 02:35:42,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 300 transitions, 717 flow [2023-08-30 02:35:42,820 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:35:42,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 300 transitions, 717 flow [2023-08-30 02:35:42,820 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 300 transitions, 717 flow [2023-08-30 02:35:42,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 300 transitions, 717 flow [2023-08-30 02:35:42,861 INFO L130 PetriNetUnfolder]: 46/451 cut-off events. [2023-08-30 02:35:42,861 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 02:35:42,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 451 events. 46/451 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1548 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 455. Up to 20 conditions per place. [2023-08-30 02:35:42,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 72036 [2023-08-30 02:35:49,039 INFO L134 LiptonReduction]: Checked pairs total: 70904 [2023-08-30 02:35:49,039 INFO L136 LiptonReduction]: Total number of compositions: 332 [2023-08-30 02:35:49,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:35:49,041 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;@7875655b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:35:49,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-30 02:35:49,041 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:35:49,041 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:35:49,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:35:49,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:35:49,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-08-30 02:35:49,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:35:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 121398, now seen corresponding path program 1 times [2023-08-30 02:35:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:35:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893672525] [2023-08-30 02:35:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:35:49,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:35:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:35:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:35:49,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:35:49,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893672525] [2023-08-30 02:35:49,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893672525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:35:49,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:35:49,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:35:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565989796] [2023-08-30 02:35:49,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:35:49,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:35:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:35:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:35:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:35:49,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 632 [2023-08-30 02:35:49,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 219 flow. Second operand has 2 states, 2 states have (on average 254.0) internal successors, (508), 2 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:35:49,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:35:49,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 632 [2023-08-30 02:35:49,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand