./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:27:10,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:27:10,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:27:10,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:27:10,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:27:10,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:27:10,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:27:10,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:27:10,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:27:10,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:27:10,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:27:10,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:27:10,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:27:10,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:27:10,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:27:10,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:27:10,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:27:10,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:27:10,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:27:10,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:27:10,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:27:10,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:27:10,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:27:10,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:27:10,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:27:10,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:27:10,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:27:10,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:27:10,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:27:10,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:27:10,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:27:10,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:27:10,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:27:10,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:27:10,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:27:10,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:27:10,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:27:10,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:27:10,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:27:10,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:27:10,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:27:10,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:27:10,639 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:27:10,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:27:10,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:27:10,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:27:10,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:27:10,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:27:10,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:27:10,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:27:10,642 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:27:10,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:27:10,642 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:27:10,642 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:27:10,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:27:10,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:27:10,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:27:10,643 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:27:10,643 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:27:10,644 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:27:10,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:27:10,644 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:27:10,644 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:27:10,644 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:27:10,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:27:10,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:27:10,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:27:10,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:27:10,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:27:10,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:27:10,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:27:10,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:27:10,646 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:27:10,646 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:27:10,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:27:10,647 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:27:10,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:27:10,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:27:11,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:27:11,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:27:11,020 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:27:11,021 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:27:11,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-09-01 03:27:12,175 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:27:12,399 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:27:12,399 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-09-01 03:27:12,407 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c69aa934/d004affcb1cc487790732eb12ff3b25c/FLAG55602d03a [2023-09-01 03:27:12,431 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c69aa934/d004affcb1cc487790732eb12ff3b25c [2023-09-01 03:27:12,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:27:12,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:27:12,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:27:12,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:27:12,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:27:12,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78adfe9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12, skipping insertion in model container [2023-09-01 03:27:12,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:27:12,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:27:12,643 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-09-01 03:27:12,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:27:12,659 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:27:12,686 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-09-01 03:27:12,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:27:12,701 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:27:12,701 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:27:12,707 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:27:12,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12 WrapperNode [2023-09-01 03:27:12,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:27:12,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:27:12,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:27:12,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:27:12,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,755 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-09-01 03:27:12,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:27:12,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:27:12,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:27:12,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:27:12,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:27:12,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:27:12,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:27:12,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:27:12,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (1/1) ... [2023-09-01 03:27:12,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:27:12,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:12,830 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) [2023-09-01 03:27:12,839 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 [2023-09-01 03:27:12,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:27:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:27:12,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:27:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:27:12,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:27:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 03:27:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:27:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 03:27:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:27:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:27:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:27:12,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:27:12,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 03:27:12,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:27:12,894 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:27:12,970 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:27:12,972 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:27:13,135 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:27:13,168 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:27:13,168 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 03:27:13,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:27:13 BoogieIcfgContainer [2023-09-01 03:27:13,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:27:13,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:27:13,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:27:13,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:27:13,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:27:12" (1/3) ... [2023-09-01 03:27:13,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2371fdf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:27:13, skipping insertion in model container [2023-09-01 03:27:13,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:27:12" (2/3) ... [2023-09-01 03:27:13,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2371fdf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:27:13, skipping insertion in model container [2023-09-01 03:27:13,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:27:13" (3/3) ... [2023-09-01 03:27:13,194 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-09-01 03:27:13,213 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:27:13,214 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 03:27:13,214 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:27:13,303 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 03:27:13,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 198 flow [2023-09-01 03:27:13,425 INFO L130 PetriNetUnfolder]: 6/89 cut-off events. [2023-09-01 03:27:13,425 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:27:13,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-09-01 03:27:13,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 198 flow [2023-09-01 03:27:13,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 182 flow [2023-09-01 03:27:13,441 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:27:13,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 85 transitions, 182 flow [2023-09-01 03:27:13,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 85 transitions, 182 flow [2023-09-01 03:27:13,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 182 flow [2023-09-01 03:27:13,491 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-09-01 03:27:13,495 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:27:13,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-09-01 03:27:13,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-09-01 03:27:16,089 INFO L134 LiptonReduction]: Checked pairs total: 665 [2023-09-01 03:27:16,089 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-09-01 03:27:16,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:27:16,108 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;@6e8fb22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:27:16,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-09-01 03:27:16,109 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 03:27:16,110 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:27:16,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:16,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 03:27:16,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:16,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash 355, now seen corresponding path program 1 times [2023-09-01 03:27:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:16,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015636159] [2023-09-01 03:27:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:16,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:16,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015636159] [2023-09-01 03:27:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015636159] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:27:16,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:27:16,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 03:27:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249926258] [2023-09-01 03:27:16,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:27:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 03:27:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:16,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 03:27:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 03:27:16,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-09-01 03:27:16,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:16,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-09-01 03:27:16,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:16,301 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-09-01 03:27:16,302 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 03:27:16,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 509 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-09-01 03:27:16,305 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-09-01 03:27:16,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-09-01 03:27:16,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 03:27:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 03:27:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2023-09-01 03:27:16,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317919075144508 [2023-09-01 03:27:16,320 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2023-09-01 03:27:16,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2023-09-01 03:27:16,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:16,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2023-09-01 03:27:16,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,330 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,331 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 184 transitions. [2023-09-01 03:27:16,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-09-01 03:27:16,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:27:16,335 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-09-01 03:27:16,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-09-01 03:27:16,340 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 03:27:16,341 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-09-01 03:27:16,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:16,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:27:16,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 03:27:16,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:16,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:16,343 INFO L85 PathProgramCache]: Analyzing trace with hash 347876, now seen corresponding path program 1 times [2023-09-01 03:27:16,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:16,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960907284] [2023-09-01 03:27:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:16,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:16,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:16,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960907284] [2023-09-01 03:27:16,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960907284] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:27:16,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:27:16,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:27:16,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622150686] [2023-09-01 03:27:16,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:27:16,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:27:16,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:16,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:27:16,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:27:16,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 173 [2023-09-01 03:27:16,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:16,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 173 [2023-09-01 03:27:16,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:16,634 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-09-01 03:27:16,634 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:27:16,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 461 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-09-01 03:27:16,636 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-09-01 03:27:16,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-09-01 03:27:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:27:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:27:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-09-01 03:27:16,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47591522157996147 [2023-09-01 03:27:16,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-09-01 03:27:16,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-09-01 03:27:16,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:16,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-09-01 03:27:16,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,643 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 247 transitions. [2023-09-01 03:27:16,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-09-01 03:27:16,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 03:27:16,644 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-09-01 03:27:16,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-09-01 03:27:16,645 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 03:27:16,645 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-09-01 03:27:16,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:16,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:27:16,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 03:27:16,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:16,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:16,647 INFO L85 PathProgramCache]: Analyzing trace with hash 347875, now seen corresponding path program 1 times [2023-09-01 03:27:16,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:16,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041430290] [2023-09-01 03:27:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:16,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:16,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:16,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041430290] [2023-09-01 03:27:16,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041430290] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:27:16,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:27:16,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:27:16,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490787219] [2023-09-01 03:27:16,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:27:16,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:27:16,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:27:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:27:16,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-09-01 03:27:16,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:16,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-09-01 03:27:16,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:16,795 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-09-01 03:27:16,795 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:27:16,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 406 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-09-01 03:27:16,798 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-09-01 03:27:16,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-09-01 03:27:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:27:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:27:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-09-01 03:27:16,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489402697495183 [2023-09-01 03:27:16,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-09-01 03:27:16,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-09-01 03:27:16,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:16,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-09-01 03:27:16,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,807 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 233 transitions. [2023-09-01 03:27:16,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-09-01 03:27:16,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:27:16,808 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-09-01 03:27:16,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-09-01 03:27:16,809 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 03:27:16,809 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-09-01 03:27:16,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:16,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:16,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:27:16,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 03:27:16,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:16,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:16,810 INFO L85 PathProgramCache]: Analyzing trace with hash 334314637, now seen corresponding path program 1 times [2023-09-01 03:27:16,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:16,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316604680] [2023-09-01 03:27:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:16,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:16,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:16,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316604680] [2023-09-01 03:27:16,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316604680] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:27:16,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:27:16,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:27:16,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571708013] [2023-09-01 03:27:16,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:27:16,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:27:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:16,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:27:16,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:27:17,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 173 [2023-09-01 03:27:17,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:17,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 173 [2023-09-01 03:27:17,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:17,066 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-09-01 03:27:17,068 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:27:17,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 281 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-09-01 03:27:17,069 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-09-01 03:27:17,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-09-01 03:27:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:27:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:27:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-09-01 03:27:17,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42196531791907516 [2023-09-01 03:27:17,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-09-01 03:27:17,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-09-01 03:27:17,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:17,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-09-01 03:27:17,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,076 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 219 transitions. [2023-09-01 03:27:17,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-09-01 03:27:17,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:27:17,077 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-09-01 03:27:17,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-09-01 03:27:17,078 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 03:27:17,078 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-09-01 03:27:17,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:17,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:27:17,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 03:27:17,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:17,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:17,079 INFO L85 PathProgramCache]: Analyzing trace with hash 334314636, now seen corresponding path program 1 times [2023-09-01 03:27:17,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:17,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796869287] [2023-09-01 03:27:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:17,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:17,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:17,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796869287] [2023-09-01 03:27:17,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796869287] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:27:17,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:27:17,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:27:17,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371909991] [2023-09-01 03:27:17,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:27:17,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:27:17,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:17,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:27:17,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:27:17,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 173 [2023-09-01 03:27:17,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:17,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 173 [2023-09-01 03:27:17,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:17,268 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-09-01 03:27:17,268 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:27:17,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-09-01 03:27:17,269 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-09-01 03:27:17,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-09-01 03:27:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:27:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:27:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-09-01 03:27:17,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45472061657032753 [2023-09-01 03:27:17,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-09-01 03:27:17,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-09-01 03:27:17,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:17,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-09-01 03:27:17,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,274 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 236 transitions. [2023-09-01 03:27:17,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-09-01 03:27:17,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:27:17,274 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-09-01 03:27:17,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-09-01 03:27:17,275 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 03:27:17,275 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-09-01 03:27:17,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:17,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:17,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 03:27:17,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:17,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash 502104479, now seen corresponding path program 1 times [2023-09-01 03:27:17,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:17,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690493] [2023-09-01 03:27:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:17,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:17,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:17,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690493] [2023-09-01 03:27:17,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690493] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:27:17,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:27:17,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:27:17,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097243546] [2023-09-01 03:27:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:27:17,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:27:17,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:17,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:27:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:27:17,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-09-01 03:27:17,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:17,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-09-01 03:27:17,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:17,459 INFO L130 PetriNetUnfolder]: 63/112 cut-off events. [2023-09-01 03:27:17,459 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:27:17,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 112 events. 63/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 332 event pairs, 13 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 230. Up to 66 conditions per place. [2023-09-01 03:27:17,462 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 17 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-09-01 03:27:17,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2023-09-01 03:27:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:27:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:27:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-09-01 03:27:17,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028901734104047 [2023-09-01 03:27:17,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-09-01 03:27:17,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-09-01 03:27:17,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:17,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-09-01 03:27:17,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,467 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 261 transitions. [2023-09-01 03:27:17,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2023-09-01 03:27:17,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:27:17,468 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 50 flow [2023-09-01 03:27:17,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-09-01 03:27:17,470 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-09-01 03:27:17,471 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 50 flow [2023-09-01 03:27:17,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:17,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:17,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 03:27:17,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:17,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:17,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1548984245, now seen corresponding path program 1 times [2023-09-01 03:27:17,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:17,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573824860] [2023-09-01 03:27:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:17,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:17,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:17,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573824860] [2023-09-01 03:27:17,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573824860] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:27:17,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:27:17,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:27:17,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606554673] [2023-09-01 03:27:17,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:27:17,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:27:17,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:17,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:27:17,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:27:17,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 173 [2023-09-01 03:27:17,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:17,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 173 [2023-09-01 03:27:17,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:17,738 INFO L130 PetriNetUnfolder]: 102/196 cut-off events. [2023-09-01 03:27:17,738 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 03:27:17,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 196 events. 102/196 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 646 event pairs, 46 based on Foata normal form. 6/174 useless extension candidates. Maximal degree in co-relation 435. Up to 125 conditions per place. [2023-09-01 03:27:17,740 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2023-09-01 03:27:17,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 37 transitions, 178 flow [2023-09-01 03:27:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:27:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:27:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 402 transitions. [2023-09-01 03:27:17,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647398843930636 [2023-09-01 03:27:17,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 402 transitions. [2023-09-01 03:27:17,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 402 transitions. [2023-09-01 03:27:17,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:17,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 402 transitions. [2023-09-01 03:27:17,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.4) internal successors, (402), 5 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,745 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,745 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 50 flow. Second operand 5 states and 402 transitions. [2023-09-01 03:27:17,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 37 transitions, 178 flow [2023-09-01 03:27:17,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:27:17,747 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 74 flow [2023-09-01 03:27:17,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2023-09-01 03:27:17,747 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-09-01 03:27:17,748 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 74 flow [2023-09-01 03:27:17,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:17,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:17,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:17,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 03:27:17,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:17,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:17,749 INFO L85 PathProgramCache]: Analyzing trace with hash 244022087, now seen corresponding path program 2 times [2023-09-01 03:27:17,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:17,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653894273] [2023-09-01 03:27:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:17,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:17,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:17,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653894273] [2023-09-01 03:27:17,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653894273] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:17,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092716812] [2023-09-01 03:27:17,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:27:17,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:17,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:17,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 03:27:17,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:27:17,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:17,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:27:17,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:27:18,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:27:18,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092716812] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:27:18,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 03:27:18,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-09-01 03:27:18,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440594234] [2023-09-01 03:27:18,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:27:18,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:27:18,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:27:18,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:27:18,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 173 [2023-09-01 03:27:18,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:18,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:18,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 173 [2023-09-01 03:27:18,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:18,099 INFO L130 PetriNetUnfolder]: 73/134 cut-off events. [2023-09-01 03:27:18,100 INFO L131 PetriNetUnfolder]: For 131/140 co-relation queries the response was YES. [2023-09-01 03:27:18,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 134 events. 73/134 cut-off events. For 131/140 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 386 event pairs, 37 based on Foata normal form. 12/134 useless extension candidates. Maximal degree in co-relation 389. Up to 105 conditions per place. [2023-09-01 03:27:18,101 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-09-01 03:27:18,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 23 transitions, 135 flow [2023-09-01 03:27:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:27:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:27:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 321 transitions. [2023-09-01 03:27:18,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638728323699422 [2023-09-01 03:27:18,103 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 321 transitions. [2023-09-01 03:27:18,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 321 transitions. [2023-09-01 03:27:18,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:18,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 321 transitions. [2023-09-01 03:27:18,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:18,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:18,112 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:18,112 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 74 flow. Second operand 4 states and 321 transitions. [2023-09-01 03:27:18,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 23 transitions, 135 flow [2023-09-01 03:27:18,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 117 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 03:27:18,113 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 62 flow [2023-09-01 03:27:18,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2023-09-01 03:27:18,114 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-09-01 03:27:18,114 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 62 flow [2023-09-01 03:27:18,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:18,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:18,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:18,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:18,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:18,322 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:18,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash 558410263, now seen corresponding path program 1 times [2023-09-01 03:27:18,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:18,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120284277] [2023-09-01 03:27:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:18,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:18,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120284277] [2023-09-01 03:27:18,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120284277] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80512031] [2023-09-01 03:27:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:18,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:18,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:18,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:18,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 03:27:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:27:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:18,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:18,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80512031] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:18,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:18,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 2] total 9 [2023-09-01 03:27:18,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067532863] [2023-09-01 03:27:18,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:18,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 03:27:18,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:18,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 03:27:18,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-09-01 03:27:19,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 173 [2023-09-01 03:27:19,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 17 transitions, 62 flow. Second operand has 11 states, 11 states have (on average 72.45454545454545) internal successors, (797), 11 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:19,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:19,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 173 [2023-09-01 03:27:19,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:19,377 INFO L130 PetriNetUnfolder]: 187/339 cut-off events. [2023-09-01 03:27:19,378 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-09-01 03:27:19,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 339 events. 187/339 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1290 event pairs, 15 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 889. Up to 109 conditions per place. [2023-09-01 03:27:19,381 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 53 selfloop transitions, 23 changer transitions 21/97 dead transitions. [2023-09-01 03:27:19,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 97 transitions, 499 flow [2023-09-01 03:27:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 03:27:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 03:27:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 994 transitions. [2023-09-01 03:27:19,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44197421076033794 [2023-09-01 03:27:19,385 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 994 transitions. [2023-09-01 03:27:19,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 994 transitions. [2023-09-01 03:27:19,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:19,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 994 transitions. [2023-09-01 03:27:19,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.46153846153847) internal successors, (994), 13 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:19,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 173.0) internal successors, (2422), 14 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:19,392 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 173.0) internal successors, (2422), 14 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:19,392 INFO L175 Difference]: Start difference. First operand has 28 places, 17 transitions, 62 flow. Second operand 13 states and 994 transitions. [2023-09-01 03:27:19,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 97 transitions, 499 flow [2023-09-01 03:27:19,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 97 transitions, 477 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:27:19,398 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 216 flow [2023-09-01 03:27:19,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=216, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-09-01 03:27:19,399 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2023-09-01 03:27:19,399 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 216 flow [2023-09-01 03:27:19,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 72.45454545454545) internal successors, (797), 11 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:19,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:19,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:19,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:19,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-09-01 03:27:19,611 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:19,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2108995189, now seen corresponding path program 2 times [2023-09-01 03:27:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:19,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785174176] [2023-09-01 03:27:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:27:19,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785174176] [2023-09-01 03:27:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785174176] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202003680] [2023-09-01 03:27:19,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:27:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:19,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:19,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 03:27:19,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:27:19,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:27:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:27:19,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:27:20,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202003680] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:20,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:20,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-09-01 03:27:20,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79150042] [2023-09-01 03:27:20,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:20,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:27:20,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:27:20,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:27:20,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 173 [2023-09-01 03:27:20,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 216 flow. Second operand has 10 states, 10 states have (on average 75.9) internal successors, (759), 10 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:20,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:20,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 173 [2023-09-01 03:27:20,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:20,247 INFO L130 PetriNetUnfolder]: 184/346 cut-off events. [2023-09-01 03:27:20,248 INFO L131 PetriNetUnfolder]: For 506/507 co-relation queries the response was YES. [2023-09-01 03:27:20,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 346 events. 184/346 cut-off events. For 506/507 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1319 event pairs, 41 based on Foata normal form. 21/367 useless extension candidates. Maximal degree in co-relation 1137. Up to 199 conditions per place. [2023-09-01 03:27:20,250 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 43 selfloop transitions, 16 changer transitions 6/67 dead transitions. [2023-09-01 03:27:20,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 470 flow [2023-09-01 03:27:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:27:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:27:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 481 transitions. [2023-09-01 03:27:20,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633911368015414 [2023-09-01 03:27:20,252 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 481 transitions. [2023-09-01 03:27:20,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 481 transitions. [2023-09-01 03:27:20,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:20,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 481 transitions. [2023-09-01 03:27:20,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:20,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:20,256 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:20,256 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 216 flow. Second operand 6 states and 481 transitions. [2023-09-01 03:27:20,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 470 flow [2023-09-01 03:27:20,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 445 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-09-01 03:27:20,260 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 309 flow [2023-09-01 03:27:20,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-09-01 03:27:20,261 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2023-09-01 03:27:20,261 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 309 flow [2023-09-01 03:27:20,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 75.9) internal successors, (759), 10 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:20,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:20,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:20,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:20,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:20,470 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:20,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:20,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2113833375, now seen corresponding path program 3 times [2023-09-01 03:27:20,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:20,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527806421] [2023-09-01 03:27:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:20,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:20,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:20,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527806421] [2023-09-01 03:27:20,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527806421] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:20,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583302811] [2023-09-01 03:27:20,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:27:20,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:20,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:20,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:20,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 03:27:20,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:27:20,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:20,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:27:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:20,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:21,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583302811] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:21,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:21,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-09-01 03:27:21,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885855761] [2023-09-01 03:27:21,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:21,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:27:21,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:27:21,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:27:21,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-09-01 03:27:21,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 309 flow. Second operand has 12 states, 12 states have (on average 74.58333333333333) internal successors, (895), 12 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:21,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:21,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-09-01 03:27:21,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:21,494 INFO L130 PetriNetUnfolder]: 223/415 cut-off events. [2023-09-01 03:27:21,495 INFO L131 PetriNetUnfolder]: For 965/965 co-relation queries the response was YES. [2023-09-01 03:27:21,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 415 events. 223/415 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1674 event pairs, 41 based on Foata normal form. 6/421 useless extension candidates. Maximal degree in co-relation 1554. Up to 187 conditions per place. [2023-09-01 03:27:21,498 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 58 selfloop transitions, 19 changer transitions 20/97 dead transitions. [2023-09-01 03:27:21,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 97 transitions, 731 flow [2023-09-01 03:27:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:27:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:27:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 866 transitions. [2023-09-01 03:27:21,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4550709406200736 [2023-09-01 03:27:21,501 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 866 transitions. [2023-09-01 03:27:21,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 866 transitions. [2023-09-01 03:27:21,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:21,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 866 transitions. [2023-09-01 03:27:21,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 78.72727272727273) internal successors, (866), 11 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:21,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:21,507 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:21,507 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 309 flow. Second operand 11 states and 866 transitions. [2023-09-01 03:27:21,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 97 transitions, 731 flow [2023-09-01 03:27:21,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 97 transitions, 700 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-09-01 03:27:21,513 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 392 flow [2023-09-01 03:27:21,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=392, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-09-01 03:27:21,514 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2023-09-01 03:27:21,514 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 392 flow [2023-09-01 03:27:21,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 74.58333333333333) internal successors, (895), 12 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:21,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:21,515 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:21,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:21,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:21,721 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:21,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1578008217, now seen corresponding path program 4 times [2023-09-01 03:27:21,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:21,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050107488] [2023-09-01 03:27:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:21,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:21,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:21,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050107488] [2023-09-01 03:27:21,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050107488] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:21,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790682653] [2023-09-01 03:27:21,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:27:21,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:21,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:21,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:21,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 03:27:21,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:27:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:21,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:27:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:22,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790682653] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:22,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:22,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 03:27:22,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080165736] [2023-09-01 03:27:22,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:22,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:27:22,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:22,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:27:22,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-09-01 03:27:22,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 173 [2023-09-01 03:27:22,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 392 flow. Second operand has 16 states, 16 states have (on average 72.375) internal successors, (1158), 16 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:22,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:22,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 173 [2023-09-01 03:27:22,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:23,109 INFO L130 PetriNetUnfolder]: 378/701 cut-off events. [2023-09-01 03:27:23,109 INFO L131 PetriNetUnfolder]: For 3199/3199 co-relation queries the response was YES. [2023-09-01 03:27:23,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3102 conditions, 701 events. 378/701 cut-off events. For 3199/3199 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3255 event pairs, 65 based on Foata normal form. 38/739 useless extension candidates. Maximal degree in co-relation 3081. Up to 249 conditions per place. [2023-09-01 03:27:23,115 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 98 selfloop transitions, 48 changer transitions 7/153 dead transitions. [2023-09-01 03:27:23,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 153 transitions, 1277 flow [2023-09-01 03:27:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 03:27:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 03:27:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1454 transitions. [2023-09-01 03:27:23,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423486461819288 [2023-09-01 03:27:23,120 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1454 transitions. [2023-09-01 03:27:23,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1454 transitions. [2023-09-01 03:27:23,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:23,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1454 transitions. [2023-09-01 03:27:23,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 76.52631578947368) internal successors, (1454), 19 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:23,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 173.0) internal successors, (3460), 20 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:23,129 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 173.0) internal successors, (3460), 20 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:23,129 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 392 flow. Second operand 19 states and 1454 transitions. [2023-09-01 03:27:23,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 153 transitions, 1277 flow [2023-09-01 03:27:23,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 153 transitions, 1155 flow, removed 53 selfloop flow, removed 5 redundant places. [2023-09-01 03:27:23,143 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 818 flow [2023-09-01 03:27:23,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=818, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2023-09-01 03:27:23,143 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-09-01 03:27:23,143 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 818 flow [2023-09-01 03:27:23,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 72.375) internal successors, (1158), 16 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:23,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:23,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:23,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 03:27:23,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 03:27:23,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:23,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash -62934905, now seen corresponding path program 5 times [2023-09-01 03:27:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:23,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209491304] [2023-09-01 03:27:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:23,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209491304] [2023-09-01 03:27:23,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209491304] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:23,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185118941] [2023-09-01 03:27:23,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:27:23,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:23,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:23,598 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:23,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 03:27:23,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:27:23,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:27:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:23,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:24,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185118941] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:24,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:24,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2023-09-01 03:27:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095803353] [2023-09-01 03:27:24,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:24,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 03:27:24,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:24,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 03:27:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-09-01 03:27:24,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-09-01 03:27:24,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 818 flow. Second operand has 15 states, 15 states have (on average 74.33333333333333) internal successors, (1115), 15 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:24,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:24,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-09-01 03:27:24,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:25,149 INFO L130 PetriNetUnfolder]: 600/1140 cut-off events. [2023-09-01 03:27:25,149 INFO L131 PetriNetUnfolder]: For 11124/11124 co-relation queries the response was YES. [2023-09-01 03:27:25,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6197 conditions, 1140 events. 600/1140 cut-off events. For 11124/11124 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6273 event pairs, 11 based on Foata normal form. 24/1164 useless extension candidates. Maximal degree in co-relation 6170. Up to 393 conditions per place. [2023-09-01 03:27:25,160 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 108 selfloop transitions, 88 changer transitions 41/237 dead transitions. [2023-09-01 03:27:25,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 237 transitions, 2354 flow [2023-09-01 03:27:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 03:27:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 03:27:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1962 transitions. [2023-09-01 03:27:25,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536416184971098 [2023-09-01 03:27:25,166 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1962 transitions. [2023-09-01 03:27:25,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1962 transitions. [2023-09-01 03:27:25,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:25,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1962 transitions. [2023-09-01 03:27:25,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 78.48) internal successors, (1962), 25 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:25,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 173.0) internal successors, (4498), 26 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:25,177 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 173.0) internal successors, (4498), 26 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:25,177 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 818 flow. Second operand 25 states and 1962 transitions. [2023-09-01 03:27:25,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 237 transitions, 2354 flow [2023-09-01 03:27:25,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 237 transitions, 2136 flow, removed 97 selfloop flow, removed 4 redundant places. [2023-09-01 03:27:25,236 INFO L231 Difference]: Finished difference. Result has 118 places, 130 transitions, 1458 flow [2023-09-01 03:27:25,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1458, PETRI_PLACES=118, PETRI_TRANSITIONS=130} [2023-09-01 03:27:25,237 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2023-09-01 03:27:25,237 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 130 transitions, 1458 flow [2023-09-01 03:27:25,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.33333333333333) internal successors, (1115), 15 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:25,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:25,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:25,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:25,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:25,444 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:25,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:25,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1171108499, now seen corresponding path program 6 times [2023-09-01 03:27:25,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:25,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077795247] [2023-09-01 03:27:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:25,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077795247] [2023-09-01 03:27:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077795247] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139367680] [2023-09-01 03:27:25,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:27:25,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:25,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:25,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:25,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 03:27:25,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:27:25,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:25,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:27:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:25,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:26,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139367680] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:26,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:26,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2023-09-01 03:27:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990267548] [2023-09-01 03:27:26,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:26,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:27:26,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:27:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:27:26,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-09-01 03:27:26,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 130 transitions, 1458 flow. Second operand has 14 states, 14 states have (on average 74.14285714285714) internal successors, (1038), 14 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:26,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:26,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-09-01 03:27:26,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:26,632 INFO L130 PetriNetUnfolder]: 611/1164 cut-off events. [2023-09-01 03:27:26,632 INFO L131 PetriNetUnfolder]: For 20005/20005 co-relation queries the response was YES. [2023-09-01 03:27:26,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7989 conditions, 1164 events. 611/1164 cut-off events. For 20005/20005 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6371 event pairs, 39 based on Foata normal form. 20/1184 useless extension candidates. Maximal degree in co-relation 7947. Up to 373 conditions per place. [2023-09-01 03:27:26,649 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 121 selfloop transitions, 93 changer transitions 17/231 dead transitions. [2023-09-01 03:27:26,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 231 transitions, 3130 flow [2023-09-01 03:27:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 03:27:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 03:27:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1395 transitions. [2023-09-01 03:27:26,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479768786127168 [2023-09-01 03:27:26,654 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1395 transitions. [2023-09-01 03:27:26,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1395 transitions. [2023-09-01 03:27:26,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:26,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1395 transitions. [2023-09-01 03:27:26,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 77.5) internal successors, (1395), 18 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:26,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 173.0) internal successors, (3287), 19 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:26,663 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 173.0) internal successors, (3287), 19 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:26,663 INFO L175 Difference]: Start difference. First operand has 118 places, 130 transitions, 1458 flow. Second operand 18 states and 1395 transitions. [2023-09-01 03:27:26,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 231 transitions, 3130 flow [2023-09-01 03:27:26,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 231 transitions, 2746 flow, removed 154 selfloop flow, removed 8 redundant places. [2023-09-01 03:27:26,800 INFO L231 Difference]: Finished difference. Result has 130 places, 170 transitions, 2112 flow [2023-09-01 03:27:26,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2112, PETRI_PLACES=130, PETRI_TRANSITIONS=170} [2023-09-01 03:27:26,801 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 101 predicate places. [2023-09-01 03:27:26,801 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 170 transitions, 2112 flow [2023-09-01 03:27:26,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 74.14285714285714) internal successors, (1038), 14 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:26,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:26,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:26,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:27,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:27,008 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:27,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1998234997, now seen corresponding path program 7 times [2023-09-01 03:27:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:27,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856490626] [2023-09-01 03:27:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:27,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:27,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:27,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856490626] [2023-09-01 03:27:27,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856490626] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:27,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525565921] [2023-09-01 03:27:27,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:27:27,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:27,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:27,161 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:27,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 03:27:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:27,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:27:27,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:27,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:27,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525565921] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:27,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:27,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-09-01 03:27:27,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486716157] [2023-09-01 03:27:27,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:27,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:27:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:27:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-09-01 03:27:27,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 173 [2023-09-01 03:27:27,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 170 transitions, 2112 flow. Second operand has 16 states, 16 states have (on average 72.3125) internal successors, (1157), 16 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:27,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:27,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 173 [2023-09-01 03:27:27,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:28,642 INFO L130 PetriNetUnfolder]: 821/1580 cut-off events. [2023-09-01 03:27:28,642 INFO L131 PetriNetUnfolder]: For 39458/39458 co-relation queries the response was YES. [2023-09-01 03:27:28,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10806 conditions, 1580 events. 821/1580 cut-off events. For 39458/39458 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9511 event pairs, 78 based on Foata normal form. 80/1660 useless extension candidates. Maximal degree in co-relation 10760. Up to 864 conditions per place. [2023-09-01 03:27:28,662 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 209 selfloop transitions, 136 changer transitions 7/352 dead transitions. [2023-09-01 03:27:28,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 352 transitions, 4704 flow [2023-09-01 03:27:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 03:27:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 03:27:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2059 transitions. [2023-09-01 03:27:28,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44080496681652753 [2023-09-01 03:27:28,666 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2059 transitions. [2023-09-01 03:27:28,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2059 transitions. [2023-09-01 03:27:28,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:28,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2059 transitions. [2023-09-01 03:27:28,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 76.25925925925925) internal successors, (2059), 27 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:28,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 173.0) internal successors, (4844), 28 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:28,677 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 173.0) internal successors, (4844), 28 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:28,677 INFO L175 Difference]: Start difference. First operand has 130 places, 170 transitions, 2112 flow. Second operand 27 states and 2059 transitions. [2023-09-01 03:27:28,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 352 transitions, 4704 flow [2023-09-01 03:27:28,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 352 transitions, 4193 flow, removed 220 selfloop flow, removed 12 redundant places. [2023-09-01 03:27:28,775 INFO L231 Difference]: Finished difference. Result has 155 places, 241 transitions, 3316 flow [2023-09-01 03:27:28,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3316, PETRI_PLACES=155, PETRI_TRANSITIONS=241} [2023-09-01 03:27:28,775 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-09-01 03:27:28,775 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 241 transitions, 3316 flow [2023-09-01 03:27:28,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 72.3125) internal successors, (1157), 16 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:28,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:28,776 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:28,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:28,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 03:27:28,983 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:28,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:28,983 INFO L85 PathProgramCache]: Analyzing trace with hash -127571903, now seen corresponding path program 8 times [2023-09-01 03:27:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:28,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316058373] [2023-09-01 03:27:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:28,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:29,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:29,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316058373] [2023-09-01 03:27:29,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316058373] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:29,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185867887] [2023-09-01 03:27:29,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:27:29,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:29,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:29,183 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:29,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 03:27:29,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:27:29,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:27:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:29,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:29,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185867887] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:29,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:29,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-09-01 03:27:29,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874600047] [2023-09-01 03:27:29,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:29,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:27:29,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:29,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:27:29,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:27:29,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-09-01 03:27:29,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 241 transitions, 3316 flow. Second operand has 14 states, 14 states have (on average 74.14285714285714) internal successors, (1038), 14 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:29,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:29,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-09-01 03:27:29,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:30,807 INFO L130 PetriNetUnfolder]: 823/1589 cut-off events. [2023-09-01 03:27:30,807 INFO L131 PetriNetUnfolder]: For 44844/44844 co-relation queries the response was YES. [2023-09-01 03:27:30,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11858 conditions, 1589 events. 823/1589 cut-off events. For 44844/44844 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9646 event pairs, 93 based on Foata normal form. 24/1613 useless extension candidates. Maximal degree in co-relation 11805. Up to 608 conditions per place. [2023-09-01 03:27:30,829 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 142 selfloop transitions, 160 changer transitions 1/303 dead transitions. [2023-09-01 03:27:30,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 303 transitions, 4522 flow [2023-09-01 03:27:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:27:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:27:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1170 transitions. [2023-09-01 03:27:30,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508670520231214 [2023-09-01 03:27:30,832 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1170 transitions. [2023-09-01 03:27:30,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1170 transitions. [2023-09-01 03:27:30,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:30,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1170 transitions. [2023-09-01 03:27:30,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.0) internal successors, (1170), 15 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:30,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 173.0) internal successors, (2768), 16 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:30,837 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 173.0) internal successors, (2768), 16 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:30,838 INFO L175 Difference]: Start difference. First operand has 155 places, 241 transitions, 3316 flow. Second operand 15 states and 1170 transitions. [2023-09-01 03:27:30,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 303 transitions, 4522 flow [2023-09-01 03:27:30,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 303 transitions, 4012 flow, removed 232 selfloop flow, removed 5 redundant places. [2023-09-01 03:27:30,968 INFO L231 Difference]: Finished difference. Result has 168 places, 260 transitions, 3620 flow [2023-09-01 03:27:30,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=2882, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3620, PETRI_PLACES=168, PETRI_TRANSITIONS=260} [2023-09-01 03:27:30,968 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 139 predicate places. [2023-09-01 03:27:30,968 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 260 transitions, 3620 flow [2023-09-01 03:27:30,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 74.14285714285714) internal successors, (1038), 14 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:30,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:30,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:30,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:31,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 03:27:31,175 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:31,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1524504279, now seen corresponding path program 9 times [2023-09-01 03:27:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:31,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003601910] [2023-09-01 03:27:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:31,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:31,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003601910] [2023-09-01 03:27:31,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003601910] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093776169] [2023-09-01 03:27:31,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:27:31,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:31,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:31,378 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:31,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 03:27:31,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:27:31,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:31,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:27:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:31,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:31,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093776169] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:31,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:31,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 03:27:31,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298908069] [2023-09-01 03:27:31,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 03:27:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 03:27:31,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-09-01 03:27:31,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-09-01 03:27:31,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 260 transitions, 3620 flow. Second operand has 15 states, 15 states have (on average 73.86666666666666) internal successors, (1108), 15 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:31,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:31,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-09-01 03:27:31,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:32,885 INFO L130 PetriNetUnfolder]: 1004/1989 cut-off events. [2023-09-01 03:27:32,885 INFO L131 PetriNetUnfolder]: For 62073/62073 co-relation queries the response was YES. [2023-09-01 03:27:32,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15404 conditions, 1989 events. 1004/1989 cut-off events. For 62073/62073 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12996 event pairs, 144 based on Foata normal form. 24/2013 useless extension candidates. Maximal degree in co-relation 15347. Up to 924 conditions per place. [2023-09-01 03:27:32,911 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 221 selfloop transitions, 189 changer transitions 3/413 dead transitions. [2023-09-01 03:27:32,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 413 transitions, 6163 flow [2023-09-01 03:27:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 03:27:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 03:27:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1727 transitions. [2023-09-01 03:27:32,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45375722543352603 [2023-09-01 03:27:32,915 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1727 transitions. [2023-09-01 03:27:32,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1727 transitions. [2023-09-01 03:27:32,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:32,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1727 transitions. [2023-09-01 03:27:32,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.5) internal successors, (1727), 22 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:32,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 173.0) internal successors, (3979), 23 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:32,922 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 173.0) internal successors, (3979), 23 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:32,922 INFO L175 Difference]: Start difference. First operand has 168 places, 260 transitions, 3620 flow. Second operand 22 states and 1727 transitions. [2023-09-01 03:27:32,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 413 transitions, 6163 flow [2023-09-01 03:27:33,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 413 transitions, 6050 flow, removed 36 selfloop flow, removed 5 redundant places. [2023-09-01 03:27:33,090 INFO L231 Difference]: Finished difference. Result has 195 places, 315 transitions, 4944 flow [2023-09-01 03:27:33,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4944, PETRI_PLACES=195, PETRI_TRANSITIONS=315} [2023-09-01 03:27:33,091 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 166 predicate places. [2023-09-01 03:27:33,091 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 315 transitions, 4944 flow [2023-09-01 03:27:33,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.86666666666666) internal successors, (1108), 15 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:33,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:33,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:33,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:33,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 03:27:33,300 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:33,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1843997177, now seen corresponding path program 10 times [2023-09-01 03:27:33,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:33,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614096204] [2023-09-01 03:27:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:33,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:33,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614096204] [2023-09-01 03:27:33,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614096204] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:33,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583490554] [2023-09-01 03:27:33,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:27:33,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:33,457 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:33,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 03:27:33,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:27:33,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:27:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:33,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:33,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583490554] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:33,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:33,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 03:27:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711708300] [2023-09-01 03:27:33,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:33,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:27:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:27:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:27:33,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-09-01 03:27:33,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 315 transitions, 4944 flow. Second operand has 14 states, 14 states have (on average 73.78571428571429) internal successors, (1033), 14 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:33,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:33,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-09-01 03:27:33,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:34,997 INFO L130 PetriNetUnfolder]: 1071/2121 cut-off events. [2023-09-01 03:27:34,997 INFO L131 PetriNetUnfolder]: For 80249/80249 co-relation queries the response was YES. [2023-09-01 03:27:35,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18271 conditions, 2121 events. 1071/2121 cut-off events. For 80249/80249 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14029 event pairs, 91 based on Foata normal form. 18/2139 useless extension candidates. Maximal degree in co-relation 18203. Up to 890 conditions per place. [2023-09-01 03:27:35,019 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 194 selfloop transitions, 195 changer transitions 13/402 dead transitions. [2023-09-01 03:27:35,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 402 transitions, 7122 flow [2023-09-01 03:27:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 03:27:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 03:27:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1619 transitions. [2023-09-01 03:27:35,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456372144233416 [2023-09-01 03:27:35,022 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1619 transitions. [2023-09-01 03:27:35,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1619 transitions. [2023-09-01 03:27:35,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:35,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1619 transitions. [2023-09-01 03:27:35,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 77.0952380952381) internal successors, (1619), 21 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:35,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 173.0) internal successors, (3806), 22 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:35,030 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 173.0) internal successors, (3806), 22 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:35,030 INFO L175 Difference]: Start difference. First operand has 195 places, 315 transitions, 4944 flow. Second operand 21 states and 1619 transitions. [2023-09-01 03:27:35,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 402 transitions, 7122 flow [2023-09-01 03:27:35,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 402 transitions, 6886 flow, removed 71 selfloop flow, removed 7 redundant places. [2023-09-01 03:27:35,236 INFO L231 Difference]: Finished difference. Result has 216 places, 338 transitions, 6014 flow [2023-09-01 03:27:35,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=4611, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6014, PETRI_PLACES=216, PETRI_TRANSITIONS=338} [2023-09-01 03:27:35,236 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2023-09-01 03:27:35,236 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 338 transitions, 6014 flow [2023-09-01 03:27:35,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.78571428571429) internal successors, (1033), 14 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:35,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:35,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:35,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:35,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 03:27:35,440 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:35,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:35,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1167349025, now seen corresponding path program 11 times [2023-09-01 03:27:35,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:35,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687158112] [2023-09-01 03:27:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:35,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:35,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687158112] [2023-09-01 03:27:35,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687158112] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969279958] [2023-09-01 03:27:35,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:27:35,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:35,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:35,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:35,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 03:27:35,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 03:27:35,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:35,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:27:35,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:35,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:27:36,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969279958] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:36,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:36,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2023-09-01 03:27:36,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320197140] [2023-09-01 03:27:36,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:36,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 03:27:36,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:36,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 03:27:36,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-09-01 03:27:36,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 173 [2023-09-01 03:27:36,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 338 transitions, 6014 flow. Second operand has 13 states, 13 states have (on average 77.23076923076923) internal successors, (1004), 13 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) [2023-09-01 03:27:36,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:36,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 173 [2023-09-01 03:27:36,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:37,226 INFO L130 PetriNetUnfolder]: 1351/2669 cut-off events. [2023-09-01 03:27:37,227 INFO L131 PetriNetUnfolder]: For 128506/128507 co-relation queries the response was YES. [2023-09-01 03:27:37,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25330 conditions, 2669 events. 1351/2669 cut-off events. For 128506/128507 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18430 event pairs, 183 based on Foata normal form. 18/2687 useless extension candidates. Maximal degree in co-relation 25256. Up to 1132 conditions per place. [2023-09-01 03:27:37,265 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 286 selfloop transitions, 128 changer transitions 84/502 dead transitions. [2023-09-01 03:27:37,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 502 transitions, 10171 flow [2023-09-01 03:27:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:27:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:27:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 905 transitions. [2023-09-01 03:27:37,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47556489753021547 [2023-09-01 03:27:37,270 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 905 transitions. [2023-09-01 03:27:37,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 905 transitions. [2023-09-01 03:27:37,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:37,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 905 transitions. [2023-09-01 03:27:37,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 82.27272727272727) internal successors, (905), 11 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:37,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:37,274 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:37,275 INFO L175 Difference]: Start difference. First operand has 216 places, 338 transitions, 6014 flow. Second operand 11 states and 905 transitions. [2023-09-01 03:27:37,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 502 transitions, 10171 flow [2023-09-01 03:27:37,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 502 transitions, 9736 flow, removed 202 selfloop flow, removed 5 redundant places. [2023-09-01 03:27:37,754 INFO L231 Difference]: Finished difference. Result has 222 places, 358 transitions, 6730 flow [2023-09-01 03:27:37,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6730, PETRI_PLACES=222, PETRI_TRANSITIONS=358} [2023-09-01 03:27:37,755 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 193 predicate places. [2023-09-01 03:27:37,755 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 358 transitions, 6730 flow [2023-09-01 03:27:37,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 77.23076923076923) internal successors, (1004), 13 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) [2023-09-01 03:27:37,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:37,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:37,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:37,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:37,968 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:37,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:37,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1651252309, now seen corresponding path program 12 times [2023-09-01 03:27:37,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:37,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685600220] [2023-09-01 03:27:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:37,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:27:38,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:38,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685600220] [2023-09-01 03:27:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685600220] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418178314] [2023-09-01 03:27:38,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:27:38,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:38,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:38,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:38,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 03:27:38,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:27:38,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:27:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:27:38,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:27:38,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:27:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:39,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418178314] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:27:39,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:27:39,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2023-09-01 03:27:39,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961759425] [2023-09-01 03:27:39,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:27:39,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 03:27:39,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:27:39,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 03:27:39,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-09-01 03:27:39,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 173 [2023-09-01 03:27:39,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 358 transitions, 6730 flow. Second operand has 19 states, 19 states have (on average 69.94736842105263) internal successors, (1329), 19 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:39,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:27:39,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 173 [2023-09-01 03:27:39,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:27:42,094 INFO L130 PetriNetUnfolder]: 1194/2376 cut-off events. [2023-09-01 03:27:42,094 INFO L131 PetriNetUnfolder]: For 129941/129941 co-relation queries the response was YES. [2023-09-01 03:27:42,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23338 conditions, 2376 events. 1194/2376 cut-off events. For 129941/129941 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16119 event pairs, 105 based on Foata normal form. 46/2422 useless extension candidates. Maximal degree in co-relation 23261. Up to 1287 conditions per place. [2023-09-01 03:27:42,129 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 272 selfloop transitions, 158 changer transitions 33/463 dead transitions. [2023-09-01 03:27:42,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 463 transitions, 9376 flow [2023-09-01 03:27:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 03:27:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 03:27:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2393 transitions. [2023-09-01 03:27:42,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419162725521107 [2023-09-01 03:27:42,134 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2393 transitions. [2023-09-01 03:27:42,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2393 transitions. [2023-09-01 03:27:42,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:27:42,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2393 transitions. [2023-09-01 03:27:42,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.51515151515152) internal successors, (2393), 33 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:42,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 173.0) internal successors, (5882), 34 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:42,145 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 173.0) internal successors, (5882), 34 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:42,145 INFO L175 Difference]: Start difference. First operand has 222 places, 358 transitions, 6730 flow. Second operand 33 states and 2393 transitions. [2023-09-01 03:27:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 463 transitions, 9376 flow [2023-09-01 03:27:42,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 463 transitions, 9171 flow, removed 63 selfloop flow, removed 9 redundant places. [2023-09-01 03:27:42,513 INFO L231 Difference]: Finished difference. Result has 251 places, 381 transitions, 7726 flow [2023-09-01 03:27:42,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=6501, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7726, PETRI_PLACES=251, PETRI_TRANSITIONS=381} [2023-09-01 03:27:42,513 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 222 predicate places. [2023-09-01 03:27:42,513 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 381 transitions, 7726 flow [2023-09-01 03:27:42,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 69.94736842105263) internal successors, (1329), 19 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:27:42,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:27:42,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:27:42,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:27:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-09-01 03:27:42,720 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:27:42,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:27:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1156883011, now seen corresponding path program 13 times [2023-09-01 03:27:42,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:27:42,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282039220] [2023-09-01 03:27:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:27:42,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:27:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:42,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:27:42,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282039220] [2023-09-01 03:27:42,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282039220] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:27:42,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515749670] [2023-09-01 03:27:42,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:27:42,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:27:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:27:42,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:27:42,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 03:27:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:27:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:27:43,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:27:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:27:43,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:29:32,090 WARN L222 SmtUtils]: Spent 30.37s on a formula simplification that was a NOOP. DAG size: 1206 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15