./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/test-easy1.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/test-easy1.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 fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --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 04:07:30,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:07:30,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:07:30,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:07:30,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:07:30,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:07:30,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:07:30,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:07:30,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:07:30,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:07:30,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:07:30,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:07:30,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:07:30,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:07:30,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:07:30,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:07:30,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:07:30,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:07:30,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:07:30,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:07:30,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:07:30,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:07:30,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:07:30,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:07:30,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:07:30,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:07:30,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:07:30,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:07:30,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:07:30,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:07:30,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:07:30,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:07:30,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:07:30,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:07:30,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:07:30,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:07:30,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:07:30,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:07:30,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:07:30,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:07:30,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:07:30,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:07:30,431 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:07:30,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:07:30,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:07:30,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:07:30,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:07:30,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:07:30,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:07:30,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:07:30,435 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:07:30,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:07:30,436 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:07:30,436 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:07:30,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:07:30,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:07:30,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:07:30,437 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:07:30,437 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:07:30,437 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:07:30,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:07:30,438 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:07:30,438 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:07:30,438 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:07:30,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:07:30,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:07:30,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:07:30,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:07:30,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:07:30,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:07:30,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:07:30,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:07:30,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:07:30,440 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:07:30,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:07:30,441 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:07:30,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:07:30,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:07:30,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:07:30,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:07:30,757 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:07:30,757 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:07:30,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2023-09-01 04:07:31,981 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:07:32,154 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:07:32,154 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2023-09-01 04:07:32,161 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba95391f/c705d35fe41646ba84665dad34001f86/FLAG51fcea5fb [2023-09-01 04:07:32,186 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba95391f/c705d35fe41646ba84665dad34001f86 [2023-09-01 04:07:32,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:07:32,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:07:32,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:07:32,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:07:32,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:07:32,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dbf43c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32, skipping insertion in model container [2023-09-01 04:07:32,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:07:32,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:07:32,384 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/test-easy1.wvr.c[1876,1889] [2023-09-01 04:07:32,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:07:32,397 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:07:32,419 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/test-easy1.wvr.c[1876,1889] [2023-09-01 04:07:32,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:07:32,440 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:07:32,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32 WrapperNode [2023-09-01 04:07:32,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:07:32,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:07:32,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:07:32,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:07:32,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,482 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2023-09-01 04:07:32,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:07:32,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:07:32,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:07:32,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:07:32,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,520 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:07:32,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:07:32,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:07:32,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:07:32,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (1/1) ... [2023-09-01 04:07:32,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:07:32,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:07:32,558 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 04:07:32,587 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 04:07:32,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:07:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 04:07:32,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 04:07:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 04:07:32,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 04:07:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 04:07:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:07:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 04:07:32,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:07:32,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:07:32,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 04:07:32,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:07:32,605 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 04:07:32,701 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:07:32,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:07:32,936 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:07:32,944 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:07:32,944 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 04:07:32,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:07:32 BoogieIcfgContainer [2023-09-01 04:07:32,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:07:32,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:07:32,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:07:32,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:07:32,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:07:32" (1/3) ... [2023-09-01 04:07:32,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e076e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:07:32, skipping insertion in model container [2023-09-01 04:07:32,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:07:32" (2/3) ... [2023-09-01 04:07:32,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e076e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:07:32, skipping insertion in model container [2023-09-01 04:07:32,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:07:32" (3/3) ... [2023-09-01 04:07:32,952 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2023-09-01 04:07:32,964 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:07:32,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 04:07:32,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:07:33,008 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:07:33,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 198 flow [2023-09-01 04:07:33,072 INFO L130 PetriNetUnfolder]: 6/89 cut-off events. [2023-09-01 04:07:33,073 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:07:33,077 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 5. Compared 68 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-09-01 04:07:33,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 198 flow [2023-09-01 04:07:33,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 182 flow [2023-09-01 04:07:33,084 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:07:33,091 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 85 transitions, 182 flow [2023-09-01 04:07:33,093 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 85 transitions, 182 flow [2023-09-01 04:07:33,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 182 flow [2023-09-01 04:07:33,113 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-09-01 04:07:33,113 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:07:33,114 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 5. Compared 69 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-09-01 04:07:33,115 INFO L119 LiptonReduction]: Number of co-enabled transitions 496 [2023-09-01 04:07:35,821 INFO L134 LiptonReduction]: Checked pairs total: 586 [2023-09-01 04:07:35,822 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-09-01 04:07:35,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:07:35,844 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;@6e7e848b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:07:35,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-09-01 04:07:35,845 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 04:07:35,845 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:07:35,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:35,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 04:07:35,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 04:07:35,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash 342, now seen corresponding path program 1 times [2023-09-01 04:07:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:35,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377320708] [2023-09-01 04:07:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:35,939 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 04:07:35,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:35,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377320708] [2023-09-01 04:07:35,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377320708] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:35,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:35,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 04:07:35,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142235284] [2023-09-01 04:07:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:35,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 04:07:35,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:35,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 04:07:35,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 04:07:35,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 177 [2023-09-01 04:07:35,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 04:07:35,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:35,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 177 [2023-09-01 04:07:35,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:36,083 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-09-01 04:07:36,083 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 04:07:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 80 events. 45/80 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 154 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 124. Up to 81 conditions per place. [2023-09-01 04:07:36,087 INFO L137 encePairwiseOnDemand]: 174/177 looper letters, 19 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-09-01 04:07:36,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 88 flow [2023-09-01 04:07:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 04:07:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 04:07:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 186 transitions. [2023-09-01 04:07:36,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254237288135594 [2023-09-01 04:07:36,101 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 186 transitions. [2023-09-01 04:07:36,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 186 transitions. [2023-09-01 04:07:36,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:36,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 186 transitions. [2023-09-01 04:07:36,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 04:07:36,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 04:07:36,117 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 04:07:36,119 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 56 flow. Second operand 2 states and 186 transitions. [2023-09-01 04:07:36,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 88 flow [2023-09-01 04:07:36,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:07:36,123 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 42 flow [2023-09-01 04:07:36,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-09-01 04:07:36,128 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-09-01 04:07:36,128 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 42 flow [2023-09-01 04:07:36,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 04:07:36,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:36,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:07:36,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 04:07:36,129 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 04:07:36,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash 334842, now seen corresponding path program 1 times [2023-09-01 04:07:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:36,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044129862] [2023-09-01 04:07:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:36,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:36,302 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 04:07:36,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044129862] [2023-09-01 04:07:36,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044129862] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:36,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:36,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:36,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919449114] [2023-09-01 04:07:36,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:36,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:36,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:36,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:36,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:36,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 177 [2023-09-01 04:07:36,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 04:07:36,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:36,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 177 [2023-09-01 04:07:36,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:36,365 INFO L130 PetriNetUnfolder]: 41/72 cut-off events. [2023-09-01 04:07:36,366 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:07:36,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 72 events. 41/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 129 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 147. Up to 72 conditions per place. [2023-09-01 04:07:36,367 INFO L137 encePairwiseOnDemand]: 174/177 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-09-01 04:07:36,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 72 flow [2023-09-01 04:07:36,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-09-01 04:07:36,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708097928436911 [2023-09-01 04:07:36,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-09-01 04:07:36,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-09-01 04:07:36,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:36,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-09-01 04:07:36,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 04:07:36,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:36,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:36,373 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 42 flow. Second operand 3 states and 250 transitions. [2023-09-01 04:07:36,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 72 flow [2023-09-01 04:07:36,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 04:07:36,374 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 40 flow [2023-09-01 04:07:36,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=40, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-09-01 04:07:36,375 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-09-01 04:07:36,375 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 40 flow [2023-09-01 04:07:36,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 04:07:36,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:36,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:07:36,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 04:07:36,376 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 04:07:36,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:36,377 INFO L85 PathProgramCache]: Analyzing trace with hash 334844, now seen corresponding path program 1 times [2023-09-01 04:07:36,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:36,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512465342] [2023-09-01 04:07:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:36,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:36,435 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 04:07:36,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:36,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512465342] [2023-09-01 04:07:36,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512465342] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:36,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:36,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:36,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310514756] [2023-09-01 04:07:36,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:36,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:36,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:36,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:36,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:36,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 177 [2023-09-01 04:07:36,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 04:07:36,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:36,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 177 [2023-09-01 04:07:36,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:36,541 INFO L130 PetriNetUnfolder]: 37/64 cut-off events. [2023-09-01 04:07:36,542 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:07:36,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 64 events. 37/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 110 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 132. Up to 64 conditions per place. [2023-09-01 04:07:36,545 INFO L137 encePairwiseOnDemand]: 174/177 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-09-01 04:07:36,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-09-01 04:07:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-09-01 04:07:36,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-09-01 04:07:36,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-09-01 04:07:36,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-09-01 04:07:36,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:36,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-09-01 04:07:36,553 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 04:07:36,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:36,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:36,559 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 40 flow. Second operand 3 states and 236 transitions. [2023-09-01 04:07:36,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-09-01 04:07:36,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 15 transitions, 65 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:36,560 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 37 flow [2023-09-01 04:07:36,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=37, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-09-01 04:07:36,562 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-09-01 04:07:36,562 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 37 flow [2023-09-01 04:07:36,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 04:07:36,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:36,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:07:36,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 04:07:36,565 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 04:07:36,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash 321791311, now seen corresponding path program 1 times [2023-09-01 04:07:36,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:36,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704246547] [2023-09-01 04:07:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:36,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:36,686 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 04:07:36,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:36,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704246547] [2023-09-01 04:07:36,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704246547] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:36,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:36,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:07:36,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470050372] [2023-09-01 04:07:36,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:36,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:07:36,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:07:36,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:07:36,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 177 [2023-09-01 04:07:36,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 37 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 04:07:36,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:36,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 177 [2023-09-01 04:07:36,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:36,764 INFO L130 PetriNetUnfolder]: 29/52 cut-off events. [2023-09-01 04:07:36,765 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:07:36,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 52 events. 29/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 76 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 109. Up to 52 conditions per place. [2023-09-01 04:07:36,766 INFO L137 encePairwiseOnDemand]: 175/177 looper letters, 13 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2023-09-01 04:07:36,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 63 flow [2023-09-01 04:07:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-09-01 04:07:36,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180790960451977 [2023-09-01 04:07:36,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-09-01 04:07:36,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-09-01 04:07:36,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:36,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-09-01 04:07:36,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 04:07:36,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:36,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:36,773 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 37 flow. Second operand 3 states and 222 transitions. [2023-09-01 04:07:36,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 63 flow [2023-09-01 04:07:36,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 14 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:36,774 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-09-01 04:07:36,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-09-01 04:07:36,775 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-09-01 04:07:36,775 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-09-01 04:07:36,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 04:07:36,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:36,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:07:36,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 04:07:36,776 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 04:07:36,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash 321791312, now seen corresponding path program 1 times [2023-09-01 04:07:36,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:36,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966833077] [2023-09-01 04:07:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:36,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:36,864 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 04:07:36,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:36,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966833077] [2023-09-01 04:07:36,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966833077] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:36,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:36,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:07:36,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902871581] [2023-09-01 04:07:36,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:36,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:07:36,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:36,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:07:36,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:07:36,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 177 [2023-09-01 04:07:36,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 04:07:36,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:36,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 177 [2023-09-01 04:07:36,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:36,961 INFO L130 PetriNetUnfolder]: 21/40 cut-off events. [2023-09-01 04:07:36,962 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:07:36,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 40 events. 21/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 86. Up to 40 conditions per place. [2023-09-01 04:07:36,962 INFO L137 encePairwiseOnDemand]: 175/177 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-09-01 04:07:36,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 60 flow [2023-09-01 04:07:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-09-01 04:07:36,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4500941619585687 [2023-09-01 04:07:36,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-09-01 04:07:36,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-09-01 04:07:36,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:36,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-09-01 04:07:36,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 04:07:36,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:36,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:36,967 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 3 states and 239 transitions. [2023-09-01 04:07:36,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 60 flow [2023-09-01 04:07:36,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 59 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:36,968 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 35 flow [2023-09-01 04:07:36,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=35, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2023-09-01 04:07:36,969 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-09-01 04:07:36,969 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 35 flow [2023-09-01 04:07:36,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 04:07:36,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:36,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:36,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 04:07:36,970 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 04:07:36,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1939358427, now seen corresponding path program 1 times [2023-09-01 04:07:36,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:36,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544764614] [2023-09-01 04:07:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:36,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:37,064 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 04:07:37,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:37,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544764614] [2023-09-01 04:07:37,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544764614] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:37,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:37,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:07:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728370306] [2023-09-01 04:07:37,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:37,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:07:37,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:37,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:07:37,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:07:37,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 177 [2023-09-01 04:07:37,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 35 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 04:07:37,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:37,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 177 [2023-09-01 04:07:37,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:37,117 INFO L130 PetriNetUnfolder]: 41/77 cut-off events. [2023-09-01 04:07:37,118 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:07:37,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 77 events. 41/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 166 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 163. Up to 51 conditions per place. [2023-09-01 04:07:37,119 INFO L137 encePairwiseOnDemand]: 173/177 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2023-09-01 04:07:37,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 23 transitions, 104 flow [2023-09-01 04:07:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:07:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:07:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-09-01 04:07:37,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745762711864407 [2023-09-01 04:07:37,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-09-01 04:07:37,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-09-01 04:07:37,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:37,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-09-01 04:07:37,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 04:07:37,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:37,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 04:07:37,123 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 35 flow. Second operand 3 states and 252 transitions. [2023-09-01 04:07:37,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 23 transitions, 104 flow [2023-09-01 04:07:37,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:37,125 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 53 flow [2023-09-01 04:07:37,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-09-01 04:07:37,126 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-09-01 04:07:37,126 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 53 flow [2023-09-01 04:07:37,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 04:07:37,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:37,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:37,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 04:07:37,127 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 04:07:37,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash 818603250, now seen corresponding path program 1 times [2023-09-01 04:07:37,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:37,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854895110] [2023-09-01 04:07:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:37,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:37,206 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 04:07:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854895110] [2023-09-01 04:07:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854895110] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:37,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:07:37,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:07:37,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074423104] [2023-09-01 04:07:37,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:07:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:07:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:07:37,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-09-01 04:07:37,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:37,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:37,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-09-01 04:07:37,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:37,277 INFO L130 PetriNetUnfolder]: 35/71 cut-off events. [2023-09-01 04:07:37,277 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 04:07:37,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 71 events. 35/71 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 153 event pairs, 6 based on Foata normal form. 6/77 useless extension candidates. Maximal degree in co-relation 177. Up to 45 conditions per place. [2023-09-01 04:07:37,278 INFO L137 encePairwiseOnDemand]: 172/177 looper letters, 15 selfloop transitions, 3 changer transitions 10/28 dead transitions. [2023-09-01 04:07:37,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 139 flow [2023-09-01 04:07:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:07:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:07:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2023-09-01 04:07:37,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491525423728814 [2023-09-01 04:07:37,280 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 318 transitions. [2023-09-01 04:07:37,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 318 transitions. [2023-09-01 04:07:37,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:37,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 318 transitions. [2023-09-01 04:07:37,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 04:07:37,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 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 04:07:37,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 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 04:07:37,283 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 53 flow. Second operand 4 states and 318 transitions. [2023-09-01 04:07:37,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 139 flow [2023-09-01 04:07:37,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:07:37,285 INFO L231 Difference]: Finished difference. Result has 25 places, 15 transitions, 63 flow [2023-09-01 04:07:37,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2023-09-01 04:07:37,285 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2023-09-01 04:07:37,286 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 63 flow [2023-09-01 04:07:37,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:37,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:37,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:37,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 04:07:37,287 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 04:07:37,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash 616670918, now seen corresponding path program 1 times [2023-09-01 04:07:37,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:37,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381707658] [2023-09-01 04:07:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:37,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:37,345 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 04:07:37,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:37,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381707658] [2023-09-01 04:07:37,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381707658] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:37,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020357655] [2023-09-01 04:07:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:37,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:07:37,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:07:37,353 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 04:07:37,360 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 04:07:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:37,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:07:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:37,491 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 04:07:37,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:37,527 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 04:07:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020357655] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:37,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:07:37,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2023-09-01 04:07:37,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650353642] [2023-09-01 04:07:37,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:37,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:07:37,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:37,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:07:37,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 04:07:37,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-09-01 04:07:37,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:37,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:37,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-09-01 04:07:37,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:37,601 INFO L130 PetriNetUnfolder]: 40/79 cut-off events. [2023-09-01 04:07:37,602 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:07:37,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 79 events. 40/79 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 2 based on Foata normal form. 6/85 useless extension candidates. Maximal degree in co-relation 230. Up to 39 conditions per place. [2023-09-01 04:07:37,603 INFO L137 encePairwiseOnDemand]: 172/177 looper letters, 24 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2023-09-01 04:07:37,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 169 flow [2023-09-01 04:07:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:07:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:07:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2023-09-01 04:07:37,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491525423728814 [2023-09-01 04:07:37,605 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 318 transitions. [2023-09-01 04:07:37,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 318 transitions. [2023-09-01 04:07:37,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:37,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 318 transitions. [2023-09-01 04:07:37,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 04:07:37,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 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 04:07:37,623 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 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 04:07:37,624 INFO L175 Difference]: Start difference. First operand has 25 places, 15 transitions, 63 flow. Second operand 4 states and 318 transitions. [2023-09-01 04:07:37,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 169 flow [2023-09-01 04:07:37,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 159 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 04:07:37,625 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 92 flow [2023-09-01 04:07:37,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-09-01 04:07:37,626 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-09-01 04:07:37,626 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 92 flow [2023-09-01 04:07:37,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:37,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:37,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:37,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 04:07:37,833 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 04:07:37,833 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 04:07:37,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1875583386, now seen corresponding path program 2 times [2023-09-01 04:07:37,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:37,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320363697] [2023-09-01 04:07:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:37,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:37,906 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 04:07:37,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:37,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320363697] [2023-09-01 04:07:37,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320363697] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:37,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5998889] [2023-09-01 04:07:37,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:07:37,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:07:37,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:07:37,913 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 04:07:37,951 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 04:07:38,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:07:38,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:38,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:07:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:38,081 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 04:07:38,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:38,159 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 04:07:38,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5998889] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:38,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 04:07:38,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2023-09-01 04:07:38,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537042135] [2023-09-01 04:07:38,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:38,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 04:07:38,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 04:07:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:07:38,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 177 [2023-09-01 04:07:38,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:38,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:38,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 177 [2023-09-01 04:07:38,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:38,256 INFO L130 PetriNetUnfolder]: 76/156 cut-off events. [2023-09-01 04:07:38,256 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-09-01 04:07:38,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 156 events. 76/156 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 501 event pairs, 4 based on Foata normal form. 1/157 useless extension candidates. Maximal degree in co-relation 523. Up to 64 conditions per place. [2023-09-01 04:07:38,258 INFO L137 encePairwiseOnDemand]: 171/177 looper letters, 35 selfloop transitions, 9 changer transitions 2/46 dead transitions. [2023-09-01 04:07:38,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 289 flow [2023-09-01 04:07:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 04:07:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 04:07:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 407 transitions. [2023-09-01 04:07:38,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598870056497175 [2023-09-01 04:07:38,260 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 407 transitions. [2023-09-01 04:07:38,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 407 transitions. [2023-09-01 04:07:38,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:38,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 407 transitions. [2023-09-01 04:07:38,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:38,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 04:07:38,263 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 04:07:38,264 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 92 flow. Second operand 5 states and 407 transitions. [2023-09-01 04:07:38,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 289 flow [2023-09-01 04:07:38,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 289 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 04:07:38,266 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 176 flow [2023-09-01 04:07:38,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-09-01 04:07:38,267 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 8 predicate places. [2023-09-01 04:07:38,267 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 176 flow [2023-09-01 04:07:38,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:38,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:38,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:38,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 04:07:38,474 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 04:07:38,474 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 04:07:38,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash 186555903, now seen corresponding path program 1 times [2023-09-01 04:07:38,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:38,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440444902] [2023-09-01 04:07:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:38,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:38,578 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 04:07:38,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440444902] [2023-09-01 04:07:38,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440444902] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400639506] [2023-09-01 04:07:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:38,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:07:38,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:07:38,581 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 04:07:38,608 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 04:07:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:38,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:07:38,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:38,714 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 04:07:38,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:38,765 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 04:07:38,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400639506] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:38,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 04:07:38,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 2] total 9 [2023-09-01 04:07:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489655752] [2023-09-01 04:07:38,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:38,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:07:38,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:07:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:07:38,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-09-01 04:07:38,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 176 flow. Second operand has 10 states, 10 states have (on average 75.7) internal successors, (757), 10 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 04:07:38,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:38,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-09-01 04:07:38,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:39,048 INFO L130 PetriNetUnfolder]: 124/248 cut-off events. [2023-09-01 04:07:39,048 INFO L131 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2023-09-01 04:07:39,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 248 events. 124/248 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 953 event pairs, 4 based on Foata normal form. 29/277 useless extension candidates. Maximal degree in co-relation 1029. Up to 83 conditions per place. [2023-09-01 04:07:39,050 INFO L137 encePairwiseOnDemand]: 171/177 looper letters, 25 selfloop transitions, 13 changer transitions 38/76 dead transitions. [2023-09-01 04:07:39,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 76 transitions, 626 flow [2023-09-01 04:07:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 04:07:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 04:07:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 853 transitions. [2023-09-01 04:07:39,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381099126861839 [2023-09-01 04:07:39,054 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 853 transitions. [2023-09-01 04:07:39,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 853 transitions. [2023-09-01 04:07:39,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:39,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 853 transitions. [2023-09-01 04:07:39,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.54545454545455) internal successors, (853), 11 states have internal predecessors, (853), 0 states have call successors, (0), 0 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 04:07:39,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 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 04:07:39,059 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 0 states have call successors, (0), 0 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 04:07:39,060 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 176 flow. Second operand 11 states and 853 transitions. [2023-09-01 04:07:39,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 76 transitions, 626 flow [2023-09-01 04:07:39,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 618 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-09-01 04:07:39,064 INFO L231 Difference]: Finished difference. Result has 51 places, 27 transitions, 251 flow [2023-09-01 04:07:39,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=251, PETRI_PLACES=51, PETRI_TRANSITIONS=27} [2023-09-01 04:07:39,065 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2023-09-01 04:07:39,065 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 27 transitions, 251 flow [2023-09-01 04:07:39,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 75.7) internal successors, (757), 10 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 04:07:39,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:39,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:39,077 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 04:07:39,277 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 04:07:39,278 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 04:07:39,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:39,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1909349441, now seen corresponding path program 2 times [2023-09-01 04:07:39,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:39,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752848548] [2023-09-01 04:07:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:39,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:39,369 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 04:07:39,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752848548] [2023-09-01 04:07:39,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752848548] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:39,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200019248] [2023-09-01 04:07:39,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:07:39,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:07:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:07:39,371 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 04:07:39,373 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 04:07:39,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:07:39,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:39,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:07:39,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:39,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:39,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200019248] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:39,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:07:39,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-09-01 04:07:39,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125589665] [2023-09-01 04:07:39,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:39,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:07:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:07:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 04:07:39,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-09-01 04:07:39,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 27 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 04:07:39,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:39,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-09-01 04:07:39,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:39,577 INFO L130 PetriNetUnfolder]: 48/94 cut-off events. [2023-09-01 04:07:39,577 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2023-09-01 04:07:39,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 94 events. 48/94 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 202 event pairs, 6 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 512. Up to 41 conditions per place. [2023-09-01 04:07:39,579 INFO L137 encePairwiseOnDemand]: 172/177 looper letters, 27 selfloop transitions, 4 changer transitions 10/41 dead transitions. [2023-09-01 04:07:39,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 408 flow [2023-09-01 04:07:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:07:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:07:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2023-09-01 04:07:39,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340866290018832 [2023-09-01 04:07:39,581 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 461 transitions. [2023-09-01 04:07:39,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 461 transitions. [2023-09-01 04:07:39,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:39,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 461 transitions. [2023-09-01 04:07:39,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.83333333333333) internal successors, (461), 6 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:39,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 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 04:07:39,586 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 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 04:07:39,587 INFO L175 Difference]: Start difference. First operand has 51 places, 27 transitions, 251 flow. Second operand 6 states and 461 transitions. [2023-09-01 04:07:39,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 408 flow [2023-09-01 04:07:39,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 339 flow, removed 23 selfloop flow, removed 9 redundant places. [2023-09-01 04:07:39,591 INFO L231 Difference]: Finished difference. Result has 47 places, 25 transitions, 187 flow [2023-09-01 04:07:39,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=47, PETRI_TRANSITIONS=25} [2023-09-01 04:07:39,591 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2023-09-01 04:07:39,592 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 25 transitions, 187 flow [2023-09-01 04:07:39,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 04:07:39,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:39,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:39,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 04:07:39,801 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 04:07:39,801 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 04:07:39,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1135847803, now seen corresponding path program 3 times [2023-09-01 04:07:39,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703180202] [2023-09-01 04:07:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:39,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:39,927 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 04:07:39,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:39,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703180202] [2023-09-01 04:07:39,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703180202] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:39,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136335981] [2023-09-01 04:07:39,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:07:39,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:07:39,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:07:39,929 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 04:07:39,951 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 04:07:39,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 04:07:39,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:39,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 04:07:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:07:40,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:07:40,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136335981] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:07:40,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:07:40,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-09-01 04:07:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810859551] [2023-09-01 04:07:40,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:07:40,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 04:07:40,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:40,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 04:07:40,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:07:40,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-09-01 04:07:40,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 25 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 04:07:40,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:40,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-09-01 04:07:40,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:40,162 INFO L130 PetriNetUnfolder]: 50/106 cut-off events. [2023-09-01 04:07:40,163 INFO L131 PetriNetUnfolder]: For 647/647 co-relation queries the response was YES. [2023-09-01 04:07:40,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 106 events. 50/106 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 259 event pairs, 10 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 514. Up to 34 conditions per place. [2023-09-01 04:07:40,164 INFO L137 encePairwiseOnDemand]: 172/177 looper letters, 31 selfloop transitions, 7 changer transitions 5/43 dead transitions. [2023-09-01 04:07:40,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 379 flow [2023-09-01 04:07:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:07:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:07:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 464 transitions. [2023-09-01 04:07:40,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369114877589454 [2023-09-01 04:07:40,166 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 464 transitions. [2023-09-01 04:07:40,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 464 transitions. [2023-09-01 04:07:40,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:40,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 464 transitions. [2023-09-01 04:07:40,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.33333333333333) internal successors, (464), 6 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:40,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 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 04:07:40,170 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 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 04:07:40,170 INFO L175 Difference]: Start difference. First operand has 47 places, 25 transitions, 187 flow. Second operand 6 states and 464 transitions. [2023-09-01 04:07:40,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 379 flow [2023-09-01 04:07:40,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 341 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-09-01 04:07:40,173 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 215 flow [2023-09-01 04:07:40,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-09-01 04:07:40,173 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2023-09-01 04:07:40,174 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 215 flow [2023-09-01 04:07:40,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 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 04:07:40,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:40,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:40,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 04:07:40,380 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 04:07:40,381 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 04:07:40,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1051664203, now seen corresponding path program 4 times [2023-09-01 04:07:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:40,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776646253] [2023-09-01 04:07:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:40,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:40,482 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 04:07:40,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:40,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776646253] [2023-09-01 04:07:40,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776646253] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:40,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513087142] [2023-09-01 04:07:40,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:07:40,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:07:40,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:07:40,489 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 04:07:40,492 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 04:07:40,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:07:40,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:07:40,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:40,611 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 04:07:40,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:40,676 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 04:07:40,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513087142] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:40,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 04:07:40,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 2] total 9 [2023-09-01 04:07:40,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717033260] [2023-09-01 04:07:40,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:40,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:07:40,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:07:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:07:40,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-09-01 04:07:40,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 75.5) internal successors, (755), 10 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:40,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:40,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-09-01 04:07:40,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:40,881 INFO L130 PetriNetUnfolder]: 70/143 cut-off events. [2023-09-01 04:07:40,882 INFO L131 PetriNetUnfolder]: For 661/661 co-relation queries the response was YES. [2023-09-01 04:07:40,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 143 events. 70/143 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 434 event pairs, 0 based on Foata normal form. 6/149 useless extension candidates. Maximal degree in co-relation 706. Up to 73 conditions per place. [2023-09-01 04:07:40,883 INFO L137 encePairwiseOnDemand]: 171/177 looper letters, 19 selfloop transitions, 3 changer transitions 30/52 dead transitions. [2023-09-01 04:07:40,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 506 flow [2023-09-01 04:07:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 04:07:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 04:07:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 543 transitions. [2023-09-01 04:07:40,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43825665859564167 [2023-09-01 04:07:40,885 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 543 transitions. [2023-09-01 04:07:40,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 543 transitions. [2023-09-01 04:07:40,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:40,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 543 transitions. [2023-09-01 04:07:40,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.57142857142857) internal successors, (543), 7 states have internal predecessors, (543), 0 states have call successors, (0), 0 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 04:07:40,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 177.0) internal successors, (1416), 8 states have internal predecessors, (1416), 0 states have call successors, (0), 0 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 04:07:40,889 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 177.0) internal successors, (1416), 8 states have internal predecessors, (1416), 0 states have call successors, (0), 0 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 04:07:40,889 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 215 flow. Second operand 7 states and 543 transitions. [2023-09-01 04:07:40,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 506 flow [2023-09-01 04:07:40,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 495 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 04:07:40,894 INFO L231 Difference]: Finished difference. Result has 53 places, 16 transitions, 124 flow [2023-09-01 04:07:40,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=124, PETRI_PLACES=53, PETRI_TRANSITIONS=16} [2023-09-01 04:07:40,895 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2023-09-01 04:07:40,895 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 16 transitions, 124 flow [2023-09-01 04:07:40,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 75.5) internal successors, (755), 10 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:40,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:40,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:40,907 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 04:07:41,102 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 04:07:41,103 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 04:07:41,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:41,103 INFO L85 PathProgramCache]: Analyzing trace with hash -269207914, now seen corresponding path program 5 times [2023-09-01 04:07:41,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:41,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694401702] [2023-09-01 04:07:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:41,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:41,167 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 04:07:41,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:41,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694401702] [2023-09-01 04:07:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694401702] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:41,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287028070] [2023-09-01 04:07:41,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 04:07:41,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:07:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:07:41,170 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 04:07:41,181 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 04:07:41,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 04:07:41,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:41,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:07:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:41,283 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 04:07:41,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:41,334 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 04:07:41,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287028070] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:41,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 04:07:41,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 04:07:41,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784751420] [2023-09-01 04:07:41,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:41,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:07:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:07:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:07:41,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-09-01 04:07:41,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 16 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 74.4) internal successors, (744), 10 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:41,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:41,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-09-01 04:07:41,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:41,480 INFO L130 PetriNetUnfolder]: 20/53 cut-off events. [2023-09-01 04:07:41,480 INFO L131 PetriNetUnfolder]: For 576/576 co-relation queries the response was YES. [2023-09-01 04:07:41,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 53 events. 20/53 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 2 based on Foata normal form. 6/59 useless extension candidates. Maximal degree in co-relation 277. Up to 15 conditions per place. [2023-09-01 04:07:41,481 INFO L137 encePairwiseOnDemand]: 172/177 looper letters, 20 selfloop transitions, 6 changer transitions 5/31 dead transitions. [2023-09-01 04:07:41,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 31 transitions, 255 flow [2023-09-01 04:07:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 04:07:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 04:07:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 609 transitions. [2023-09-01 04:07:41,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300847457627119 [2023-09-01 04:07:41,484 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 609 transitions. [2023-09-01 04:07:41,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 609 transitions. [2023-09-01 04:07:41,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:41,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 609 transitions. [2023-09-01 04:07:41,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 76.125) internal successors, (609), 8 states have internal predecessors, (609), 0 states have call successors, (0), 0 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 04:07:41,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 177.0) internal successors, (1593), 9 states have internal predecessors, (1593), 0 states have call successors, (0), 0 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 04:07:41,488 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 177.0) internal successors, (1593), 9 states have internal predecessors, (1593), 0 states have call successors, (0), 0 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 04:07:41,488 INFO L175 Difference]: Start difference. First operand has 53 places, 16 transitions, 124 flow. Second operand 8 states and 609 transitions. [2023-09-01 04:07:41,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 31 transitions, 255 flow [2023-09-01 04:07:41,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 187 flow, removed 24 selfloop flow, removed 14 redundant places. [2023-09-01 04:07:41,490 INFO L231 Difference]: Finished difference. Result has 42 places, 17 transitions, 101 flow [2023-09-01 04:07:41,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=101, PETRI_PLACES=42, PETRI_TRANSITIONS=17} [2023-09-01 04:07:41,491 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2023-09-01 04:07:41,491 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 17 transitions, 101 flow [2023-09-01 04:07:41,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 74.4) internal successors, (744), 10 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:07:41,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:07:41,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:41,501 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 04:07:41,701 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 04:07:41,701 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 04:07:41,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:07:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1563361209, now seen corresponding path program 6 times [2023-09-01 04:07:41,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:07:41,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934011904] [2023-09-01 04:07:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:07:41,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:07:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:07:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 04:07:41,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:07:41,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934011904] [2023-09-01 04:07:41,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934011904] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:07:41,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029505283] [2023-09-01 04:07:41,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 04:07:41,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:07:41,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:07:41,827 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 04:07:41,830 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 04:07:41,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 04:07:41,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:07:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 04:07:41,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:07:41,981 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 04:07:41,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:07:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 04:07:42,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029505283] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:07:42,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 04:07:42,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 12 [2023-09-01 04:07:42,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229514442] [2023-09-01 04:07:42,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 04:07:42,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 04:07:42,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:07:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 04:07:42,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-09-01 04:07:42,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 177 [2023-09-01 04:07:42,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 17 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 75.15384615384616) internal successors, (977), 13 states have internal predecessors, (977), 0 states have call successors, (0), 0 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 04:07:42,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:07:42,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 177 [2023-09-01 04:07:42,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:07:42,284 INFO L130 PetriNetUnfolder]: 32/74 cut-off events. [2023-09-01 04:07:42,284 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2023-09-01 04:07:42,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 74 events. 32/74 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 153 event pairs, 2 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 323. Up to 23 conditions per place. [2023-09-01 04:07:42,285 INFO L137 encePairwiseOnDemand]: 171/177 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-09-01 04:07:42,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 37 transitions, 274 flow [2023-09-01 04:07:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 04:07:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 04:07:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 685 transitions. [2023-09-01 04:07:42,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300062774639046 [2023-09-01 04:07:42,287 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 685 transitions. [2023-09-01 04:07:42,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 685 transitions. [2023-09-01 04:07:42,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:07:42,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 685 transitions. [2023-09-01 04:07:42,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 76.11111111111111) internal successors, (685), 9 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 04:07:42,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 177.0) internal successors, (1770), 10 states have internal predecessors, (1770), 0 states have call successors, (0), 0 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 04:07:42,292 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 177.0) internal successors, (1770), 10 states have internal predecessors, (1770), 0 states have call successors, (0), 0 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 04:07:42,292 INFO L175 Difference]: Start difference. First operand has 42 places, 17 transitions, 101 flow. Second operand 9 states and 685 transitions. [2023-09-01 04:07:42,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 37 transitions, 274 flow [2023-09-01 04:07:42,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 253 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 04:07:42,294 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2023-09-01 04:07:42,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2023-09-01 04:07:42,295 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-09-01 04:07:42,295 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2023-09-01 04:07:42,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 75.15384615384616) internal successors, (977), 13 states have internal predecessors, (977), 0 states have call successors, (0), 0 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 04:07:42,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2023-09-01 04:07:42,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-09-01 04:07:42,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-09-01 04:07:42,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-09-01 04:07:42,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-09-01 04:07:42,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-09-01 04:07:42,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-09-01 04:07:42,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2023-09-01 04:07:42,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-09-01 04:07:42,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-09-01 04:07:42,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-09-01 04:07:42,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2023-09-01 04:07:42,314 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 04:07:42,507 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 04:07:42,507 INFO L445 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:07:42,511 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 04:07:42,511 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 04:07:42,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 04:07:42 BasicIcfg [2023-09-01 04:07:42,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 04:07:42,513 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 04:07:42,513 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 04:07:42,513 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 04:07:42,514 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:07:32" (3/4) ... [2023-09-01 04:07:42,515 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 04:07:42,519 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-09-01 04:07:42,519 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-09-01 04:07:42,522 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2023-09-01 04:07:42,522 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 04:07:42,523 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 04:07:42,523 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 04:07:42,545 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 04:07:42,545 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 04:07:42,546 INFO L158 Benchmark]: Toolchain (without parser) took 10356.21ms. Allocated memory was 79.7MB in the beginning and 142.6MB in the end (delta: 62.9MB). Free memory was 60.5MB in the beginning and 97.6MB in the end (delta: -37.1MB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. [2023-09-01 04:07:42,546 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:07:42,546 INFO L158 Benchmark]: CACSL2BoogieTranslator took 248.17ms. Allocated memory is still 79.7MB. Free memory was 60.2MB in the beginning and 49.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 04:07:42,547 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.68ms. Allocated memory is still 79.7MB. Free memory was 49.7MB in the beginning and 48.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:07:42,547 INFO L158 Benchmark]: Boogie Preprocessor took 41.61ms. Allocated memory is still 79.7MB. Free memory was 48.0MB in the beginning and 46.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:07:42,547 INFO L158 Benchmark]: RCFGBuilder took 419.79ms. Allocated memory is still 79.7MB. Free memory was 46.7MB in the beginning and 55.3MB in the end (delta: -8.6MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2023-09-01 04:07:42,547 INFO L158 Benchmark]: TraceAbstraction took 9565.54ms. Allocated memory was 79.7MB in the beginning and 142.6MB in the end (delta: 62.9MB). Free memory was 54.5MB in the beginning and 100.6MB in the end (delta: -46.1MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2023-09-01 04:07:42,548 INFO L158 Benchmark]: Witness Printer took 32.20ms. Allocated memory is still 142.6MB. Free memory was 100.6MB in the beginning and 97.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:07:42,549 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 248.17ms. Allocated memory is still 79.7MB. Free memory was 60.2MB in the beginning and 49.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.68ms. Allocated memory is still 79.7MB. Free memory was 49.7MB in the beginning and 48.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.61ms. Allocated memory is still 79.7MB. Free memory was 48.0MB in the beginning and 46.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 419.79ms. Allocated memory is still 79.7MB. Free memory was 46.7MB in the beginning and 55.3MB in the end (delta: -8.6MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. * TraceAbstraction took 9565.54ms. Allocated memory was 79.7MB in the beginning and 142.6MB in the end (delta: 62.9MB). Free memory was 54.5MB in the beginning and 100.6MB in the end (delta: -46.1MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. * Witness Printer took 32.20ms. Allocated memory is still 142.6MB. Free memory was 100.6MB in the beginning and 97.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 86 PlacesBefore, 27 PlacesAfterwards, 85 TransitionsBefore, 22 TransitionsAfterwards, 496 CoEnabledTransitionPairs, 7 FixpointIterations, 51 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 86 TotalNumberOfCompositions, 586 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 586, independent: 586, independent conditional: 0, independent unconditional: 586, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 269, independent: 269, independent conditional: 0, independent unconditional: 269, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 586, independent: 317, independent conditional: 0, independent unconditional: 317, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 269, unknown conditional: 0, unknown unconditional: 269] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 70]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 56]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 102 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.5s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 950 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 645 mSDsluCounter, 110 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 29 mSDsCounter, 113 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1925 IncrementalHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 113 mSolverCounterUnsat, 81 mSDtfsCounter, 1925 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 250 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=251occurred in iteration=10, InterpolantAutomatonStates: 77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 250 NumberOfCodeBlocks, 250 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 1763 SizeOfPredicates, 12 NumberOfNonLiveVariables, 987 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 29 InterpolantComputations, 11 PerfectInterpolantSequences, 20/57 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 04:07:42,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE