./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:10:37,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:10:37,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:10:37,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:10:37,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:10:37,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:10:37,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:10:37,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:10:37,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:10:37,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:10:37,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:10:37,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:10:37,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:10:37,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:10:37,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:10:37,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:10:37,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:10:37,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:10:37,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:10:37,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:10:37,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:10:37,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:10:37,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:10:37,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:10:37,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:10:37,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:10:37,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:10:37,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:10:37,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:10:37,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:10:37,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:10:37,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:10:37,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:10:37,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:10:37,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:10:37,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:10:37,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:10:37,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:10:37,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:10:37,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:10:37,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:10:37,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:10:37,517 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:10:37,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:10:37,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:10:37,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:10:37,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:10:37,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:10:37,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:10:37,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:10:37,520 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:10:37,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:10:37,522 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:10:37,522 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:10:37,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:10:37,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:10:37,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:10:37,523 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:10:37,523 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:10:37,523 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:10:37,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:10:37,523 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:10:37,524 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:10:37,524 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:10:37,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:10:37,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:10:37,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:10:37,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:10:37,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:10:37,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:10:37,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:10:37,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:10:37,526 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:10:37,526 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:10:37,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:10:37,526 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:10:37,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:10:37,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:10:37,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:10:37,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:10:37,850 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:10:37,850 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:10:37,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-29 21:10:38,895 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:10:39,193 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:10:39,194 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-29 21:10:39,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a83ad95/514e6a52750447fd9edef7bdbea49dba/FLAG30681230a [2023-08-29 21:10:39,222 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a83ad95/514e6a52750447fd9edef7bdbea49dba [2023-08-29 21:10:39,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:10:39,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:10:39,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:10:39,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:10:39,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:10:39,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2f51b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39, skipping insertion in model container [2023-08-29 21:10:39,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:10:39,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:10:39,426 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-08-29 21:10:39,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:10:39,737 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:10:39,747 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-08-29 21:10:39,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:10:39,847 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:10:39,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39 WrapperNode [2023-08-29 21:10:39,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:10:39,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:10:39,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:10:39,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:10:39,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,893 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2023-08-29 21:10:39,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:10:39,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:10:39,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:10:39,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:10:39,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,926 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:10:39,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:10:39,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:10:39,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:10:39,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (1/1) ... [2023-08-29 21:10:39,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:10:39,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:39,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:10:39,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:10:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:10:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:10:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:10:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:10:39,990 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:10:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:10:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-08-29 21:10:39,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-08-29 21:10:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:10:39,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:10:39,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:10:39,993 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:10:40,115 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:10:40,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:10:40,347 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:10:40,353 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:10:40,368 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 21:10:40,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:10:40 BoogieIcfgContainer [2023-08-29 21:10:40,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:10:40,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:10:40,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:10:40,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:10:40,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:10:39" (1/3) ... [2023-08-29 21:10:40,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecfb49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:10:40, skipping insertion in model container [2023-08-29 21:10:40,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:10:39" (2/3) ... [2023-08-29 21:10:40,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecfb49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:10:40, skipping insertion in model container [2023-08-29 21:10:40,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:10:40" (3/3) ... [2023-08-29 21:10:40,378 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-08-29 21:10:40,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:10:40,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:10:40,416 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:10:40,490 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:10:40,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 94 transitions, 196 flow [2023-08-29 21:10:40,600 INFO L130 PetriNetUnfolder]: 7/93 cut-off events. [2023-08-29 21:10:40,600 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:10:40,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 93 events. 7/93 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-08-29 21:10:40,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 94 transitions, 196 flow [2023-08-29 21:10:40,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 89 transitions, 184 flow [2023-08-29 21:10:40,614 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:10:40,628 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 89 transitions, 184 flow [2023-08-29 21:10:40,632 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 89 transitions, 184 flow [2023-08-29 21:10:40,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 89 transitions, 184 flow [2023-08-29 21:10:40,674 INFO L130 PetriNetUnfolder]: 7/89 cut-off events. [2023-08-29 21:10:40,675 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:10:40,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 89 events. 7/89 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-08-29 21:10:40,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 798 [2023-08-29 21:10:42,730 INFO L134 LiptonReduction]: Checked pairs total: 1058 [2023-08-29 21:10:42,730 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-08-29 21:10:42,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:10:42,745 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;@5db05964, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:10:42,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-29 21:10:42,746 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 21:10:42,746 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:10:42,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:42,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 21:10:42,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:42,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:42,751 INFO L85 PathProgramCache]: Analyzing trace with hash 361, now seen corresponding path program 1 times [2023-08-29 21:10:42,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:42,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606321150] [2023-08-29 21:10:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:42,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:42,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:42,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606321150] [2023-08-29 21:10:42,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606321150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:10:42,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:10:42,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 21:10:42,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683586637] [2023-08-29 21:10:42,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:10:42,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 21:10:42,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:42,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 21:10:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 21:10:42,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2023-08-29 21:10:42,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:42,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:42,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2023-08-29 21:10:42,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:42,905 INFO L130 PetriNetUnfolder]: 37/78 cut-off events. [2023-08-29 21:10:42,906 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:10:42,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 78 events. 37/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 221 event pairs, 25 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 146. Up to 77 conditions per place. [2023-08-29 21:10:42,907 INFO L137 encePairwiseOnDemand]: 181/184 looper letters, 16 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-29 21:10:42,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 72 flow [2023-08-29 21:10:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 21:10:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 21:10:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 187 transitions. [2023-08-29 21:10:42,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081521739130435 [2023-08-29 21:10:42,919 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 187 transitions. [2023-08-29 21:10:42,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 187 transitions. [2023-08-29 21:10:42,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:42,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 187 transitions. [2023-08-29 21:10:42,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:42,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:42,929 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:42,931 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 2 states and 187 transitions. [2023-08-29 21:10:42,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 72 flow [2023-08-29 21:10:42,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:10:42,934 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 36 flow [2023-08-29 21:10:42,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2023-08-29 21:10:42,939 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -4 predicate places. [2023-08-29 21:10:42,939 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 36 flow [2023-08-29 21:10:42,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:42,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:42,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:10:42,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:10:42,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:42,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:42,949 INFO L85 PathProgramCache]: Analyzing trace with hash 11025112, now seen corresponding path program 1 times [2023-08-29 21:10:42,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:42,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765938277] [2023-08-29 21:10:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:42,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:43,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:43,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765938277] [2023-08-29 21:10:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765938277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:10:43,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:10:43,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:10:43,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365961853] [2023-08-29 21:10:43,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:10:43,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:10:43,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:43,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:10:43,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:10:43,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-29 21:10:43,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:43,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-29 21:10:43,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:43,150 INFO L130 PetriNetUnfolder]: 49/112 cut-off events. [2023-08-29 21:10:43,151 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:10:43,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 112 events. 49/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 387 event pairs, 25 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 213. Up to 77 conditions per place. [2023-08-29 21:10:43,153 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-29 21:10:43,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 100 flow [2023-08-29 21:10:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:10:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:10:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-08-29 21:10:43,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2023-08-29 21:10:43,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-08-29 21:10:43,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-08-29 21:10:43,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:43,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-08-29 21:10:43,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,173 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 36 flow. Second operand 3 states and 264 transitions. [2023-08-29 21:10:43,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 100 flow [2023-08-29 21:10:43,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:10:43,175 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 52 flow [2023-08-29 21:10:43,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-29 21:10:43,176 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-08-29 21:10:43,176 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 52 flow [2023-08-29 21:10:43,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:43,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:43,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:10:43,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:43,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2031391342, now seen corresponding path program 1 times [2023-08-29 21:10:43,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:43,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992125404] [2023-08-29 21:10:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:43,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:43,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:43,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992125404] [2023-08-29 21:10:43,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992125404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:43,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529198191] [2023-08-29 21:10:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:43,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:43,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:43,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:43,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:10:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:10:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:43,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:43,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529198191] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:43,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:43,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:10:43,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240788221] [2023-08-29 21:10:43,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:43,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:10:43,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:43,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:10:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:10:43,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 184 [2023-08-29 21:10:43,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 79.85714285714286) internal successors, (559), 7 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:43,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 184 [2023-08-29 21:10:43,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:43,654 INFO L130 PetriNetUnfolder]: 79/184 cut-off events. [2023-08-29 21:10:43,654 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-29 21:10:43,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 184 events. 79/184 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 555 event pairs, 20 based on Foata normal form. 18/177 useless extension candidates. Maximal degree in co-relation 399. Up to 59 conditions per place. [2023-08-29 21:10:43,657 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 41 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2023-08-29 21:10:43,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 48 transitions, 210 flow [2023-08-29 21:10:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:10:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:10:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 524 transitions. [2023-08-29 21:10:43,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4746376811594203 [2023-08-29 21:10:43,659 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 524 transitions. [2023-08-29 21:10:43,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 524 transitions. [2023-08-29 21:10:43,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:43,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 524 transitions. [2023-08-29 21:10:43,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.33333333333333) internal successors, (524), 6 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,664 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,664 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 52 flow. Second operand 6 states and 524 transitions. [2023-08-29 21:10:43,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 48 transitions, 210 flow [2023-08-29 21:10:43,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 48 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:10:43,666 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 102 flow [2023-08-29 21:10:43,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-08-29 21:10:43,667 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2023-08-29 21:10:43,667 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 102 flow [2023-08-29 21:10:43,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.85714285714286) internal successors, (559), 7 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:43,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:43,668 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-08-29 21:10:43,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:10:43,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:43,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:43,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1325181784, now seen corresponding path program 2 times [2023-08-29 21:10:43,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:43,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20970756] [2023-08-29 21:10:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:43,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-29 21:10:44,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:44,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20970756] [2023-08-29 21:10:44,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20970756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:10:44,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:10:44,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:10:44,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602847632] [2023-08-29 21:10:44,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:10:44,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:10:44,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:44,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:10:44,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:10:44,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 184 [2023-08-29 21:10:44,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 102 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) [2023-08-29 21:10:44,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:44,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 184 [2023-08-29 21:10:44,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:44,098 INFO L130 PetriNetUnfolder]: 73/156 cut-off events. [2023-08-29 21:10:44,098 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-29 21:10:44,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 156 events. 73/156 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 451 event pairs, 55 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 473. Up to 148 conditions per place. [2023-08-29 21:10:44,106 INFO L137 encePairwiseOnDemand]: 182/184 looper letters, 18 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-29 21:10:44,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 20 transitions, 130 flow [2023-08-29 21:10:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:10:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:10:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-08-29 21:10:44,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420289855072464 [2023-08-29 21:10:44,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-08-29 21:10:44,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-08-29 21:10:44,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:44,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-08-29 21:10:44,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:44,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:44,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:44,111 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 102 flow. Second operand 3 states and 244 transitions. [2023-08-29 21:10:44,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 20 transitions, 130 flow [2023-08-29 21:10:44,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 20 transitions, 122 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 21:10:44,114 INFO L231 Difference]: Finished difference. Result has 29 places, 20 transitions, 86 flow [2023-08-29 21:10:44,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=20} [2023-08-29 21:10:44,116 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2023-08-29 21:10:44,116 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 20 transitions, 86 flow [2023-08-29 21:10:44,116 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) [2023-08-29 21:10:44,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:44,117 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-08-29 21:10:44,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:10:44,117 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:44,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1325181785, now seen corresponding path program 1 times [2023-08-29 21:10:44,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:44,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330016127] [2023-08-29 21:10:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:44,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:44,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330016127] [2023-08-29 21:10:44,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330016127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:44,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621558215] [2023-08-29 21:10:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:44,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:44,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:44,273 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:44,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:10:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:10:44,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:44,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:44,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621558215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:44,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:44,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 21:10:44,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950100657] [2023-08-29 21:10:44,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:44,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:10:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:10:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:10:44,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 184 [2023-08-29 21:10:44,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 86 flow. Second operand has 13 states, 13 states have (on average 79.92307692307692) internal successors, (1039), 13 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:44,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:44,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 184 [2023-08-29 21:10:44,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:44,686 INFO L130 PetriNetUnfolder]: 145/352 cut-off events. [2023-08-29 21:10:44,687 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-08-29 21:10:44,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 352 events. 145/352 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1046 event pairs, 15 based on Foata normal form. 36/358 useless extension candidates. Maximal degree in co-relation 934. Up to 72 conditions per place. [2023-08-29 21:10:44,690 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 82 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2023-08-29 21:10:44,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 95 transitions, 478 flow [2023-08-29 21:10:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:10:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:10:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1042 transitions. [2023-08-29 21:10:44,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47192028985507245 [2023-08-29 21:10:44,694 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1042 transitions. [2023-08-29 21:10:44,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1042 transitions. [2023-08-29 21:10:44,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:44,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1042 transitions. [2023-08-29 21:10:44,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.83333333333333) internal successors, (1042), 12 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:44,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:44,703 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:44,703 INFO L175 Difference]: Start difference. First operand has 29 places, 20 transitions, 86 flow. Second operand 12 states and 1042 transitions. [2023-08-29 21:10:44,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 95 transitions, 478 flow [2023-08-29 21:10:44,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 95 transitions, 477 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:10:44,709 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 193 flow [2023-08-29 21:10:44,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=193, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-29 21:10:44,711 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2023-08-29 21:10:44,712 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 193 flow [2023-08-29 21:10:44,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 79.92307692307692) internal successors, (1039), 13 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:44,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:44,712 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1] [2023-08-29 21:10:44,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 21:10:44,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:44,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:44,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:44,918 INFO L85 PathProgramCache]: Analyzing trace with hash -291476455, now seen corresponding path program 2 times [2023-08-29 21:10:44,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:44,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675479408] [2023-08-29 21:10:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:45,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:45,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675479408] [2023-08-29 21:10:45,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675479408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:45,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517956605] [2023-08-29 21:10:45,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:10:45,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:45,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:45,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:45,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:10:45,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 21:10:45,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:10:45,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 21:10:45,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:45,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:10:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-08-29 21:10:45,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:10:45,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517956605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:10:45,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:10:45,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [12] total 13 [2023-08-29 21:10:45,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673376025] [2023-08-29 21:10:45,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:10:45,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:10:45,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:45,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:10:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-08-29 21:10:45,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-29 21:10:45,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:45,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:45,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-29 21:10:45,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:45,511 INFO L130 PetriNetUnfolder]: 139/324 cut-off events. [2023-08-29 21:10:45,512 INFO L131 PetriNetUnfolder]: For 770/770 co-relation queries the response was YES. [2023-08-29 21:10:45,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077 conditions, 324 events. 139/324 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 947 event pairs, 110 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 1062. Up to 280 conditions per place. [2023-08-29 21:10:45,514 INFO L137 encePairwiseOnDemand]: 182/184 looper letters, 24 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-29 21:10:45,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 26 transitions, 221 flow [2023-08-29 21:10:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:10:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:10:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-08-29 21:10:45,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2023-08-29 21:10:45,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-08-29 21:10:45,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-08-29 21:10:45,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:45,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-08-29 21:10:45,517 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) [2023-08-29 21:10:45,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:45,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:45,518 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 193 flow. Second operand 3 states and 252 transitions. [2023-08-29 21:10:45,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 26 transitions, 221 flow [2023-08-29 21:10:45,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:10:45,522 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 167 flow [2023-08-29 21:10:45,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2023-08-29 21:10:45,523 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 22 predicate places. [2023-08-29 21:10:45,523 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 167 flow [2023-08-29 21:10:45,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:45,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:45,524 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:45,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 21:10:45,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:45,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:45,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1834541916, now seen corresponding path program 1 times [2023-08-29 21:10:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:45,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19191951] [2023-08-29 21:10:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:45,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-08-29 21:10:45,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:45,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19191951] [2023-08-29 21:10:45,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19191951] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:10:45,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:10:45,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:10:45,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448445759] [2023-08-29 21:10:45,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:10:45,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:10:45,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:45,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:10:45,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:10:45,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 184 [2023-08-29 21:10:45,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 167 flow. Second operand has 3 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) [2023-08-29 21:10:45,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:45,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 184 [2023-08-29 21:10:45,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:45,915 INFO L130 PetriNetUnfolder]: 231/532 cut-off events. [2023-08-29 21:10:45,916 INFO L131 PetriNetUnfolder]: For 1174/1174 co-relation queries the response was YES. [2023-08-29 21:10:45,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 532 events. 231/532 cut-off events. For 1174/1174 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1943 event pairs, 137 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 1729. Up to 281 conditions per place. [2023-08-29 21:10:45,919 INFO L137 encePairwiseOnDemand]: 181/184 looper letters, 42 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-29 21:10:45,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 403 flow [2023-08-29 21:10:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:10:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:10:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-08-29 21:10:45,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47644927536231885 [2023-08-29 21:10:45,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-08-29 21:10:45,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-08-29 21:10:45,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:45,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-08-29 21:10:45,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:45,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:45,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:45,924 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 167 flow. Second operand 3 states and 263 transitions. [2023-08-29 21:10:45,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 403 flow [2023-08-29 21:10:45,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:10:45,930 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 178 flow [2023-08-29 21:10:45,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-29 21:10:45,932 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2023-08-29 21:10:45,932 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 178 flow [2023-08-29 21:10:45,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-29 21:10:45,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:45,932 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:45,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:10:45,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:45,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash 514079677, now seen corresponding path program 1 times [2023-08-29 21:10:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:45,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383760656] [2023-08-29 21:10:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-08-29 21:10:46,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:46,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383760656] [2023-08-29 21:10:46,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383760656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:10:46,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:10:46,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:10:46,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823638998] [2023-08-29 21:10:46,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:10:46,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:10:46,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:10:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:10:46,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-29 21:10:46,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 178 flow. Second operand has 3 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) [2023-08-29 21:10:46,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:46,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-29 21:10:46,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:46,125 INFO L130 PetriNetUnfolder]: 85/298 cut-off events. [2023-08-29 21:10:46,126 INFO L131 PetriNetUnfolder]: For 1214/1214 co-relation queries the response was YES. [2023-08-29 21:10:46,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 298 events. 85/298 cut-off events. For 1214/1214 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 946 event pairs, 36 based on Foata normal form. 86/384 useless extension candidates. Maximal degree in co-relation 1014. Up to 154 conditions per place. [2023-08-29 21:10:46,128 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 14 selfloop transitions, 16 changer transitions 0/31 dead transitions. [2023-08-29 21:10:46,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 31 transitions, 277 flow [2023-08-29 21:10:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:10:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:10:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-29 21:10:46,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46557971014492755 [2023-08-29 21:10:46,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-29 21:10:46,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-29 21:10:46,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:46,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-29 21:10:46,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:46,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:46,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:46,132 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 178 flow. Second operand 3 states and 257 transitions. [2023-08-29 21:10:46,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 31 transitions, 277 flow [2023-08-29 21:10:46,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 31 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:10:46,137 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 208 flow [2023-08-29 21:10:46,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-08-29 21:10:46,139 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-08-29 21:10:46,139 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 208 flow [2023-08-29 21:10:46,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-29 21:10:46,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:46,139 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:46,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:10:46,140 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:46,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1311206625, now seen corresponding path program 2 times [2023-08-29 21:10:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:46,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797844421] [2023-08-29 21:10:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:46,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-08-29 21:10:46,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:46,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797844421] [2023-08-29 21:10:46,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797844421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:46,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944219697] [2023-08-29 21:10:46,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:10:46,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:46,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:46,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:46,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:10:46,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:10:46,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:10:46,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:10:46,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-08-29 21:10:46,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-08-29 21:10:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944219697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:46,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:46,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 21:10:46,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600664174] [2023-08-29 21:10:46,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:46,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:10:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:10:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:10:46,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-29 21:10:46,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:46,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:46,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-29 21:10:46,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:46,587 INFO L130 PetriNetUnfolder]: 136/512 cut-off events. [2023-08-29 21:10:46,588 INFO L131 PetriNetUnfolder]: For 2306/2306 co-relation queries the response was YES. [2023-08-29 21:10:46,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 512 events. 136/512 cut-off events. For 2306/2306 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2222 event pairs, 25 based on Foata normal form. 69/581 useless extension candidates. Maximal degree in co-relation 2000. Up to 142 conditions per place. [2023-08-29 21:10:46,591 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 92 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2023-08-29 21:10:46,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 99 transitions, 1108 flow [2023-08-29 21:10:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:10:46,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:10:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 520 transitions. [2023-08-29 21:10:46,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47101449275362317 [2023-08-29 21:10:46,594 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 520 transitions. [2023-08-29 21:10:46,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 520 transitions. [2023-08-29 21:10:46,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:46,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 520 transitions. [2023-08-29 21:10:46,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.66666666666667) internal successors, (520), 6 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:46,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:46,597 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:46,597 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 208 flow. Second operand 6 states and 520 transitions. [2023-08-29 21:10:46,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 99 transitions, 1108 flow [2023-08-29 21:10:46,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 99 transitions, 1034 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:10:46,604 INFO L231 Difference]: Finished difference. Result has 55 places, 30 transitions, 235 flow [2023-08-29 21:10:46,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=55, PETRI_TRANSITIONS=30} [2023-08-29 21:10:46,605 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 33 predicate places. [2023-08-29 21:10:46,605 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 30 transitions, 235 flow [2023-08-29 21:10:46,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:46,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:46,605 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:46,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 21:10:46,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:46,816 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:46,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1535673350, now seen corresponding path program 3 times [2023-08-29 21:10:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:46,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29625862] [2023-08-29 21:10:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:46,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-08-29 21:10:46,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:46,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29625862] [2023-08-29 21:10:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29625862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823714366] [2023-08-29 21:10:46,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 21:10:46,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:46,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:46,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:47,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:10:47,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-29 21:10:47,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:10:47,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:10:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-08-29 21:10:47,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-08-29 21:10:47,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823714366] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:47,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:47,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-29 21:10:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192328952] [2023-08-29 21:10:47,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:47,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:10:47,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:10:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:10:47,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-29 21:10:47,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 30 transitions, 235 flow. Second operand has 13 states, 13 states have (on average 83.23076923076923) internal successors, (1082), 13 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:47,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:47,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-29 21:10:47,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:47,518 INFO L130 PetriNetUnfolder]: 250/1058 cut-off events. [2023-08-29 21:10:47,519 INFO L131 PetriNetUnfolder]: For 5495/5495 co-relation queries the response was YES. [2023-08-29 21:10:47,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4395 conditions, 1058 events. 250/1058 cut-off events. For 5495/5495 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5529 event pairs, 25 based on Foata normal form. 138/1196 useless extension candidates. Maximal degree in co-relation 4374. Up to 261 conditions per place. [2023-08-29 21:10:47,526 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 200 selfloop transitions, 12 changer transitions 0/213 dead transitions. [2023-08-29 21:10:47,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 213 transitions, 2336 flow [2023-08-29 21:10:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:10:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:10:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1045 transitions. [2023-08-29 21:10:47,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732789855072464 [2023-08-29 21:10:47,529 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1045 transitions. [2023-08-29 21:10:47,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1045 transitions. [2023-08-29 21:10:47,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:47,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1045 transitions. [2023-08-29 21:10:47,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 87.08333333333333) internal successors, (1045), 12 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:47,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:47,536 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:47,536 INFO L175 Difference]: Start difference. First operand has 55 places, 30 transitions, 235 flow. Second operand 12 states and 1045 transitions. [2023-08-29 21:10:47,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 213 transitions, 2336 flow [2023-08-29 21:10:47,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 213 transitions, 2316 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-29 21:10:47,548 INFO L231 Difference]: Finished difference. Result has 72 places, 37 transitions, 330 flow [2023-08-29 21:10:47,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=330, PETRI_PLACES=72, PETRI_TRANSITIONS=37} [2023-08-29 21:10:47,549 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2023-08-29 21:10:47,549 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 37 transitions, 330 flow [2023-08-29 21:10:47,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.23076923076923) internal successors, (1082), 13 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:47,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:47,550 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:47,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:10:47,755 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,SelfDestructingSolverStorable9 [2023-08-29 21:10:47,756 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:47,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash -204718828, now seen corresponding path program 4 times [2023-08-29 21:10:47,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:47,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424839200] [2023-08-29 21:10:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:47,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 10 proven. 208 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-08-29 21:10:48,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:48,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424839200] [2023-08-29 21:10:48,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424839200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:48,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124557106] [2023-08-29 21:10:48,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 21:10:48,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:48,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:48,055 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:48,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:10:48,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 21:10:48,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:10:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 21:10:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 10 proven. 208 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-08-29 21:10:48,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 10 proven. 208 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-08-29 21:10:48,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124557106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:48,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:48,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-08-29 21:10:48,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7626930] [2023-08-29 21:10:48,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:48,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 21:10:48,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 21:10:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-08-29 21:10:48,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-29 21:10:48,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 37 transitions, 330 flow. Second operand has 23 states, 23 states have (on average 83.34782608695652) internal successors, (1917), 23 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:48,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:48,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-29 21:10:48,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:49,185 INFO L130 PetriNetUnfolder]: 440/1962 cut-off events. [2023-08-29 21:10:49,185 INFO L131 PetriNetUnfolder]: For 20033/20033 co-relation queries the response was YES. [2023-08-29 21:10:49,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8862 conditions, 1962 events. 440/1962 cut-off events. For 20033/20033 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 11067 event pairs, 34 based on Foata normal form. 230/2192 useless extension candidates. Maximal degree in co-relation 8834. Up to 491 conditions per place. [2023-08-29 21:10:49,200 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 380 selfloop transitions, 22 changer transitions 0/403 dead transitions. [2023-08-29 21:10:49,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 403 transitions, 4550 flow [2023-08-29 21:10:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 21:10:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 21:10:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1919 transitions. [2023-08-29 21:10:49,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740612648221344 [2023-08-29 21:10:49,205 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1919 transitions. [2023-08-29 21:10:49,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1919 transitions. [2023-08-29 21:10:49,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:49,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1919 transitions. [2023-08-29 21:10:49,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 87.22727272727273) internal successors, (1919), 22 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:49,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 184.0) internal successors, (4232), 23 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:49,217 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 184.0) internal successors, (4232), 23 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:49,217 INFO L175 Difference]: Start difference. First operand has 72 places, 37 transitions, 330 flow. Second operand 22 states and 1919 transitions. [2023-08-29 21:10:49,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 403 transitions, 4550 flow [2023-08-29 21:10:49,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 403 transitions, 4544 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:10:49,239 INFO L231 Difference]: Finished difference. Result has 101 places, 48 transitions, 535 flow [2023-08-29 21:10:49,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=535, PETRI_PLACES=101, PETRI_TRANSITIONS=48} [2023-08-29 21:10:49,240 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 79 predicate places. [2023-08-29 21:10:49,240 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 48 transitions, 535 flow [2023-08-29 21:10:49,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 83.34782608695652) internal successors, (1917), 23 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:49,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:49,242 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:49,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 21:10:49,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:49,450 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:49,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1101720572, now seen corresponding path program 5 times [2023-08-29 21:10:49,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:49,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668538566] [2023-08-29 21:10:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:49,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 20 proven. 145 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-08-29 21:10:49,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668538566] [2023-08-29 21:10:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668538566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669715722] [2023-08-29 21:10:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 21:10:49,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:49,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:49,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:49,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:10:50,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-08-29 21:10:50,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:10:50,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 21:10:50,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 20 proven. 145 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-08-29 21:10:50,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 20 proven. 145 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-08-29 21:10:50,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669715722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:50,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:50,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-08-29 21:10:50,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235325806] [2023-08-29 21:10:50,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:50,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 21:10:50,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:50,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 21:10:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-08-29 21:10:50,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 184 [2023-08-29 21:10:50,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 48 transitions, 535 flow. Second operand has 23 states, 23 states have (on average 80.3913043478261) internal successors, (1849), 23 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:50,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:50,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 184 [2023-08-29 21:10:50,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:10:51,248 INFO L130 PetriNetUnfolder]: 690/3522 cut-off events. [2023-08-29 21:10:51,248 INFO L131 PetriNetUnfolder]: For 68098/68098 co-relation queries the response was YES. [2023-08-29 21:10:51,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17106 conditions, 3522 events. 690/3522 cut-off events. For 68098/68098 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 24121 event pairs, 104 based on Foata normal form. 830/4352 useless extension candidates. Maximal degree in co-relation 17067. Up to 921 conditions per place. [2023-08-29 21:10:51,279 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 613 selfloop transitions, 22 changer transitions 0/636 dead transitions. [2023-08-29 21:10:51,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 636 transitions, 9445 flow [2023-08-29 21:10:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 21:10:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 21:10:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1899 transitions. [2023-08-29 21:10:51,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691205533596838 [2023-08-29 21:10:51,286 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1899 transitions. [2023-08-29 21:10:51,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1899 transitions. [2023-08-29 21:10:51,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:10:51,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1899 transitions. [2023-08-29 21:10:51,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.31818181818181) internal successors, (1899), 22 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:51,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 184.0) internal successors, (4232), 23 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:51,298 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 184.0) internal successors, (4232), 23 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:51,298 INFO L175 Difference]: Start difference. First operand has 101 places, 48 transitions, 535 flow. Second operand 22 states and 1899 transitions. [2023-08-29 21:10:51,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 636 transitions, 9445 flow [2023-08-29 21:10:51,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 636 transitions, 9067 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 21:10:51,370 INFO L231 Difference]: Finished difference. Result has 124 places, 59 transitions, 728 flow [2023-08-29 21:10:51,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=728, PETRI_PLACES=124, PETRI_TRANSITIONS=59} [2023-08-29 21:10:51,371 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 102 predicate places. [2023-08-29 21:10:51,372 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 59 transitions, 728 flow [2023-08-29 21:10:51,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 80.3913043478261) internal successors, (1849), 23 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:51,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:10:51,373 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:10:51,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-29 21:10:51,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:51,579 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:10:51,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:10:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1303140678, now seen corresponding path program 6 times [2023-08-29 21:10:51,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:10:51,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913629281] [2023-08-29 21:10:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:10:51,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:10:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:10:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:55,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:10:55,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913629281] [2023-08-29 21:10:55,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913629281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:10:55,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751465756] [2023-08-29 21:10:55,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 21:10:55,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:10:55,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:10:55,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:10:55,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:10:56,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-08-29 21:10:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:10:56,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-29 21:10:56,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:10:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:56,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:10:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:10:57,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751465756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:10:57,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:10:57,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-29 21:10:57,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266690045] [2023-08-29 21:10:57,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:10:57,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-29 21:10:57,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:10:57,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-29 21:10:57,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-29 21:10:58,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-29 21:10:58,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 59 transitions, 728 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:10:58,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:10:58,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-29 21:10:58,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:11:36,315 INFO L130 PetriNetUnfolder]: 6510/20606 cut-off events. [2023-08-29 21:11:36,315 INFO L131 PetriNetUnfolder]: For 815463/815463 co-relation queries the response was YES. [2023-08-29 21:11:36,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166620 conditions, 20606 events. 6510/20606 cut-off events. For 815463/815463 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 201527 event pairs, 2026 based on Foata normal form. 1/20607 useless extension candidates. Maximal degree in co-relation 166570. Up to 6000 conditions per place. [2023-08-29 21:11:36,599 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 1653 selfloop transitions, 521 changer transitions 1/2175 dead transitions. [2023-08-29 21:11:36,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 2175 transitions, 31062 flow [2023-08-29 21:11:36,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2023-08-29 21:11:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2023-08-29 21:11:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 22640 transitions. [2023-08-29 21:11:36,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523657289002558 [2023-08-29 21:11:36,644 INFO L72 ComplementDD]: Start complementDD. Operand 272 states and 22640 transitions. [2023-08-29 21:11:36,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 272 states and 22640 transitions. [2023-08-29 21:11:36,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:11:36,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 272 states and 22640 transitions. [2023-08-29 21:11:36,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 273 states, 272 states have (on average 83.23529411764706) internal successors, (22640), 272 states have internal predecessors, (22640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:36,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 273 states, 273 states have (on average 184.0) internal successors, (50232), 273 states have internal predecessors, (50232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:36,791 INFO L81 ComplementDD]: Finished complementDD. Result has 273 states, 273 states have (on average 184.0) internal successors, (50232), 273 states have internal predecessors, (50232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:36,791 INFO L175 Difference]: Start difference. First operand has 124 places, 59 transitions, 728 flow. Second operand 272 states and 22640 transitions. [2023-08-29 21:11:36,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 2175 transitions, 31062 flow [2023-08-29 21:11:45,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 2175 transitions, 31026 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 21:11:45,153 INFO L231 Difference]: Finished difference. Result has 387 places, 638 transitions, 3059 flow [2023-08-29 21:11:45,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=272, PETRI_FLOW=3059, PETRI_PLACES=387, PETRI_TRANSITIONS=638} [2023-08-29 21:11:45,154 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 365 predicate places. [2023-08-29 21:11:45,154 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 638 transitions, 3059 flow [2023-08-29 21:11:45,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:45,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:11:45,156 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:11:45,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 21:11:45,369 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,SelfDestructingSolverStorable12 [2023-08-29 21:11:45,370 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:11:45,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:11:45,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1965990962, now seen corresponding path program 7 times [2023-08-29 21:11:45,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:11:45,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537689833] [2023-08-29 21:11:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:11:45,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:11:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:11:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:11:48,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:11:48,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537689833] [2023-08-29 21:11:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537689833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:11:48,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507907434] [2023-08-29 21:11:48,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 21:11:48,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:11:48,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:11:48,853 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:11:48,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 21:11:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:11:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-29 21:11:49,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:11:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:11:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:11:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:11:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507907434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:11:50,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:11:50,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-29 21:11:50,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519805282] [2023-08-29 21:11:50,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:11:50,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-29 21:11:50,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:11:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-29 21:11:50,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-29 21:11:51,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-29 21:11:51,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 638 transitions, 3059 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:11:51,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:11:51,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-29 21:11:51,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:12:44,957 INFO L130 PetriNetUnfolder]: 13472/42873 cut-off events. [2023-08-29 21:12:44,957 INFO L131 PetriNetUnfolder]: For 1667443/1667443 co-relation queries the response was YES. [2023-08-29 21:12:45,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357645 conditions, 42873 events. 13472/42873 cut-off events. For 1667443/1667443 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 479586 event pairs, 4416 based on Foata normal form. 1/42874 useless extension candidates. Maximal degree in co-relation 357593. Up to 20095 conditions per place. [2023-08-29 21:12:45,469 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 3224 selfloop transitions, 930 changer transitions 1/4155 dead transitions. [2023-08-29 21:12:45,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 4155 transitions, 52968 flow [2023-08-29 21:12:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 378 states. [2023-08-29 21:12:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2023-08-29 21:12:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 31327 transitions. [2023-08-29 21:12:45,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041120312859445 [2023-08-29 21:12:45,511 INFO L72 ComplementDD]: Start complementDD. Operand 378 states and 31327 transitions. [2023-08-29 21:12:45,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 378 states and 31327 transitions. [2023-08-29 21:12:45,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:12:45,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 378 states and 31327 transitions. [2023-08-29 21:12:45,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 379 states, 378 states have (on average 82.87566137566138) internal successors, (31327), 378 states have internal predecessors, (31327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:12:45,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 379 states, 379 states have (on average 184.0) internal successors, (69736), 379 states have internal predecessors, (69736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:12:45,637 INFO L81 ComplementDD]: Finished complementDD. Result has 379 states, 379 states have (on average 184.0) internal successors, (69736), 379 states have internal predecessors, (69736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:12:45,638 INFO L175 Difference]: Start difference. First operand has 387 places, 638 transitions, 3059 flow. Second operand 378 states and 31327 transitions. [2023-08-29 21:12:45,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 4155 transitions, 52968 flow [2023-08-29 21:12:54,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 4155 transitions, 52968 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:12:54,817 INFO L231 Difference]: Finished difference. Result has 838 places, 1539 transitions, 9601 flow [2023-08-29 21:12:54,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3059, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=378, PETRI_FLOW=9601, PETRI_PLACES=838, PETRI_TRANSITIONS=1539} [2023-08-29 21:12:54,818 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 816 predicate places. [2023-08-29 21:12:54,818 INFO L495 AbstractCegarLoop]: Abstraction has has 838 places, 1539 transitions, 9601 flow [2023-08-29 21:12:54,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:12:54,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:12:54,820 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:12:54,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 21:12:55,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-29 21:12:55,028 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:12:55,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:12:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1499751758, now seen corresponding path program 8 times [2023-08-29 21:12:55,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:12:55,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138260836] [2023-08-29 21:12:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:12:55,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:12:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:12:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:12:58,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:12:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138260836] [2023-08-29 21:12:58,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138260836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:12:58,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153948823] [2023-08-29 21:12:58,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:12:58,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:12:58,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:12:58,317 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:12:58,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 21:12:58,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:12:58,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:12:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-29 21:12:58,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:12:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:12:59,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:12:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:12:59,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153948823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:12:59,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:12:59,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-29 21:12:59,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456710325] [2023-08-29 21:12:59,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:12:59,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-29 21:12:59,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:12:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-29 21:12:59,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-29 21:13:00,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-29 21:13:00,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 838 places, 1539 transitions, 9601 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:13:00,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:13:00,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-29 21:13:00,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:14:17,593 INFO L130 PetriNetUnfolder]: 22509/71378 cut-off events. [2023-08-29 21:14:17,593 INFO L131 PetriNetUnfolder]: For 2834369/2834369 co-relation queries the response was YES. [2023-08-29 21:14:19,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625007 conditions, 71378 events. 22509/71378 cut-off events. For 2834369/2834369 co-relation queries the response was YES. Maximal size of possible extension queue 1359. Compared 871196 event pairs, 7357 based on Foata normal form. 1/71379 useless extension candidates. Maximal degree in co-relation 624880. Up to 39458 conditions per place. [2023-08-29 21:14:20,205 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 3984 selfloop transitions, 1422 changer transitions 1/5407 dead transitions. [2023-08-29 21:14:20,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1224 places, 5407 transitions, 66904 flow [2023-08-29 21:14:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 387 states. [2023-08-29 21:14:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2023-08-29 21:14:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 32090 transitions. [2023-08-29 21:14:20,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45065161217840694 [2023-08-29 21:14:20,237 INFO L72 ComplementDD]: Start complementDD. Operand 387 states and 32090 transitions. [2023-08-29 21:14:20,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 387 states and 32090 transitions. [2023-08-29 21:14:20,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:14:20,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 387 states and 32090 transitions. [2023-08-29 21:14:20,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 388 states, 387 states have (on average 82.91989664082688) internal successors, (32090), 387 states have internal predecessors, (32090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:14:20,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 388 states, 388 states have (on average 184.0) internal successors, (71392), 388 states have internal predecessors, (71392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:14:20,351 INFO L81 ComplementDD]: Finished complementDD. Result has 388 states, 388 states have (on average 184.0) internal successors, (71392), 388 states have internal predecessors, (71392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:14:20,351 INFO L175 Difference]: Start difference. First operand has 838 places, 1539 transitions, 9601 flow. Second operand 387 states and 32090 transitions. [2023-08-29 21:14:20,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1224 places, 5407 transitions, 66904 flow [2023-08-29 21:14:46,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1221 places, 5407 transitions, 65243 flow, removed 826 selfloop flow, removed 3 redundant places. [2023-08-29 21:14:46,136 INFO L231 Difference]: Finished difference. Result has 1483 places, 2801 transitions, 22177 flow [2023-08-29 21:14:46,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=8540, PETRI_DIFFERENCE_MINUEND_PLACES=835, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=387, PETRI_FLOW=22177, PETRI_PLACES=1483, PETRI_TRANSITIONS=2801} [2023-08-29 21:14:46,138 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1461 predicate places. [2023-08-29 21:14:46,138 INFO L495 AbstractCegarLoop]: Abstraction has has 1483 places, 2801 transitions, 22177 flow [2023-08-29 21:14:46,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:14:46,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:14:46,139 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:14:46,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 21:14:46,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 21:14:46,340 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:14:46,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:14:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash 677243664, now seen corresponding path program 9 times [2023-08-29 21:14:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:14:46,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456022735] [2023-08-29 21:14:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:14:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:14:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:14:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:14:49,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:14:49,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456022735] [2023-08-29 21:14:49,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456022735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:14:49,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659653693] [2023-08-29 21:14:49,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 21:14:49,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:14:49,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:14:49,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:14:49,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 21:14:49,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-08-29 21:14:49,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:14:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-29 21:14:49,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:14:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:14:50,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:14:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:14:50,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659653693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:14:50,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:14:50,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-29 21:14:50,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129794084] [2023-08-29 21:14:50,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:14:50,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-29 21:14:50,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:14:50,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-29 21:14:50,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-29 21:14:51,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-29 21:14:51,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1483 places, 2801 transitions, 22177 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:14:51,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:14:51,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-29 21:14:51,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:13,255 INFO L130 PetriNetUnfolder]: 33866/106841 cut-off events. [2023-08-29 21:17:13,255 INFO L131 PetriNetUnfolder]: For 4403897/4403897 co-relation queries the response was YES. [2023-08-29 21:17:26,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980909 conditions, 106841 events. 33866/106841 cut-off events. For 4403897/4403897 co-relation queries the response was YES. Maximal size of possible extension queue 2114. Compared 1392903 event pairs, 10899 based on Foata normal form. 1/106842 useless extension candidates. Maximal degree in co-relation 980519. Up to 50574 conditions per place. [2023-08-29 21:17:26,429 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 4151 selfloop transitions, 2595 changer transitions 1/6747 dead transitions. [2023-08-29 21:17:26,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1843 places, 6747 transitions, 84221 flow [2023-08-29 21:17:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2023-08-29 21:17:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2023-08-29 21:17:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 29933 transitions. [2023-08-29 21:17:26,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450635312537637 [2023-08-29 21:17:26,452 INFO L72 ComplementDD]: Start complementDD. Operand 361 states and 29933 transitions. [2023-08-29 21:17:26,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 361 states and 29933 transitions. [2023-08-29 21:17:26,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:26,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 361 states and 29933 transitions. [2023-08-29 21:17:26,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 362 states, 361 states have (on average 82.91689750692521) internal successors, (29933), 361 states have internal predecessors, (29933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:26,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 362 states, 362 states have (on average 184.0) internal successors, (66608), 362 states have internal predecessors, (66608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:26,553 INFO L81 ComplementDD]: Finished complementDD. Result has 362 states, 362 states have (on average 184.0) internal successors, (66608), 362 states have internal predecessors, (66608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:26,553 INFO L175 Difference]: Start difference. First operand has 1483 places, 2801 transitions, 22177 flow. Second operand 361 states and 29933 transitions. [2023-08-29 21:17:26,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1843 places, 6747 transitions, 84221 flow [2023-08-29 21:18:38,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1836 places, 6747 transitions, 82620 flow, removed 790 selfloop flow, removed 7 redundant places. [2023-08-29 21:18:38,146 INFO L231 Difference]: Finished difference. Result has 2103 places, 4150 transitions, 42369 flow [2023-08-29 21:18:38,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=20576, PETRI_DIFFERENCE_MINUEND_PLACES=1476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=361, PETRI_FLOW=42369, PETRI_PLACES=2103, PETRI_TRANSITIONS=4150} [2023-08-29 21:18:38,150 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 2081 predicate places. [2023-08-29 21:18:38,150 INFO L495 AbstractCegarLoop]: Abstraction has has 2103 places, 4150 transitions, 42369 flow [2023-08-29 21:18:38,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:18:38,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:18:38,151 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:18:38,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-29 21:18:38,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-29 21:18:38,361 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-29 21:18:38,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:18:38,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1448542338, now seen corresponding path program 10 times [2023-08-29 21:18:38,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:18:38,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726773165] [2023-08-29 21:18:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:18:38,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:18:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:18:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:18:41,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:18:41,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726773165] [2023-08-29 21:18:41,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726773165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:18:41,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593587424] [2023-08-29 21:18:41,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 21:18:41,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:18:41,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:18:41,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:18:41,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 21:18:42,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 21:18:42,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:18:42,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-29 21:18:42,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:18:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:18:43,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:18:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:18:43,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593587424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:18:43,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:18:43,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-29 21:18:43,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857203777] [2023-08-29 21:18:43,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:18:43,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-29 21:18:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:18:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-29 21:18:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-29 21:18:44,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-29 21:18:44,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2103 places, 4150 transitions, 42369 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:18:44,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:18:44,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-29 21:18:44,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand