./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:38:50,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:38:50,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:38:50,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:38:50,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:38:50,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:38:50,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:38:50,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:38:50,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:38:50,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:38:50,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:38:50,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:38:50,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:38:50,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:38:50,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:38:50,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:38:50,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:38:50,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:38:50,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:38:50,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:38:50,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:38:50,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:38:50,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:38:50,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:38:50,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:38:50,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:38:50,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:38:50,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:38:50,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:38:50,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:38:50,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:38:50,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:38:50,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:38:50,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:38:50,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:38:50,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:38:50,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:38:50,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:38:50,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:38:50,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:38:50,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:38:50,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:38:50,931 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:38:50,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:38:50,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:38:50,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:38:50,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:38:50,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:38:50,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:38:50,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:38:50,933 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:38:50,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:38:50,934 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:38:50,934 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:38:50,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:38:50,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:38:50,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:38:50,935 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:38:50,935 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:38:50,935 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:38:50,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:38:50,936 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:38:50,936 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:38:50,936 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:38:50,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:38:50,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:38:50,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:38:50,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:38:50,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:38:50,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:38:50,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:38:50,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:38:50,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:38:50,937 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:38:50,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:38:50,938 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:38:50,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:38:51,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:38:51,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:38:51,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:38:51,202 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:38:51,202 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:38:51,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-09-01 03:38:52,232 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:38:52,404 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:38:52,405 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-09-01 03:38:52,417 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5d68136/063a4e7c8359433fa1be10ffc3ca310a/FLAGf2c72420d [2023-09-01 03:38:52,436 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5d68136/063a4e7c8359433fa1be10ffc3ca310a [2023-09-01 03:38:52,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:38:52,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:38:52,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:38:52,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:38:52,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:38:52,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef72ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52, skipping insertion in model container [2023-09-01 03:38:52,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:38:52,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:38:52,628 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2612,2625] [2023-09-01 03:38:52,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:38:52,642 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:38:52,669 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2612,2625] [2023-09-01 03:38:52,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:38:52,677 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:38:52,678 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:38:52,681 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:38:52,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52 WrapperNode [2023-09-01 03:38:52,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:38:52,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:38:52,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:38:52,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:38:52,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,721 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-09-01 03:38:52,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:38:52,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:38:52,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:38:52,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:38:52,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,754 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:38:52,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:38:52,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:38:52,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:38:52,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (1/1) ... [2023-09-01 03:38:52,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:38:52,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:38:52,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:38:52,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:38:52,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:38:52,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:38:52,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:38:52,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:38:52,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:38:52,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:38:52,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:38:52,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 03:38:52,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 03:38:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 03:38:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:38:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 03:38:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:38:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:38:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:38:52,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:38:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 03:38:52,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:38:52,834 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:38:52,929 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:38:52,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:38:53,154 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:38:53,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:38:53,182 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 03:38:53,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:38:53 BoogieIcfgContainer [2023-09-01 03:38:53,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:38:53,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:38:53,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:38:53,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:38:53,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:38:52" (1/3) ... [2023-09-01 03:38:53,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb39faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:38:53, skipping insertion in model container [2023-09-01 03:38:53,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:38:52" (2/3) ... [2023-09-01 03:38:53,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb39faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:38:53, skipping insertion in model container [2023-09-01 03:38:53,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:38:53" (3/3) ... [2023-09-01 03:38:53,221 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-09-01 03:38:53,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:38:53,237 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-09-01 03:38:53,237 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:38:53,328 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 03:38:53,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 148 transitions, 328 flow [2023-09-01 03:38:53,407 INFO L130 PetriNetUnfolder]: 10/144 cut-off events. [2023-09-01 03:38:53,411 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:38:53,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 144 events. 10/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 154 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-09-01 03:38:53,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 148 transitions, 328 flow [2023-09-01 03:38:53,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 140 transitions, 304 flow [2023-09-01 03:38:53,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:38:53,437 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 140 transitions, 304 flow [2023-09-01 03:38:53,439 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 140 transitions, 304 flow [2023-09-01 03:38:53,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 140 transitions, 304 flow [2023-09-01 03:38:53,462 INFO L130 PetriNetUnfolder]: 10/140 cut-off events. [2023-09-01 03:38:53,462 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 03:38:53,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 140 events. 10/140 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 153 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-09-01 03:38:53,466 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-09-01 03:38:57,239 INFO L134 LiptonReduction]: Checked pairs total: 3407 [2023-09-01 03:38:57,240 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-09-01 03:38:57,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:38:57,273 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;@4168f063, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:38:57,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-09-01 03:38:57,275 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 03:38:57,275 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:38:57,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:38:57,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 03:38:57,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:38:57,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:38:57,280 INFO L85 PathProgramCache]: Analyzing trace with hash 577, now seen corresponding path program 1 times [2023-09-01 03:38:57,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:38:57,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117498767] [2023-09-01 03:38:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:38:57,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:38:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:38:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:38:57,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:38:57,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117498767] [2023-09-01 03:38:57,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117498767] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:38:57,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:38:57,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 03:38:57,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224739156] [2023-09-01 03:38:57,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:38:57,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 03:38:57,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:38:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 03:38:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 03:38:57,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 278 [2023-09-01 03:38:57,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 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) [2023-09-01 03:38:57,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:38:57,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 278 [2023-09-01 03:38:57,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:38:57,680 INFO L130 PetriNetUnfolder]: 2518/3157 cut-off events. [2023-09-01 03:38:57,681 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-09-01 03:38:57,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6409 conditions, 3157 events. 2518/3157 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 11209 event pairs, 1179 based on Foata normal form. 0/1490 useless extension candidates. Maximal degree in co-relation 4953. Up to 3127 conditions per place. [2023-09-01 03:38:57,703 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-09-01 03:38:57,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-09-01 03:38:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 03:38:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 03:38:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 304 transitions. [2023-09-01 03:38:57,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467625899280576 [2023-09-01 03:38:57,716 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 304 transitions. [2023-09-01 03:38:57,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 304 transitions. [2023-09-01 03:38:57,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:38:57,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 304 transitions. [2023-09-01 03:38:57,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 152.0) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:57,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:57,727 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:57,728 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 116 flow. Second operand 2 states and 304 transitions. [2023-09-01 03:38:57,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-09-01 03:38:57,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 03:38:57,734 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-09-01 03:38:57,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-09-01 03:38:57,739 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-09-01 03:38:57,739 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-09-01 03:38:57,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 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) [2023-09-01 03:38:57,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:38:57,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:38:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 03:38:57,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:38:57,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:38:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash 566674, now seen corresponding path program 1 times [2023-09-01 03:38:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:38:57,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066677823] [2023-09-01 03:38:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:38:57,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:38:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:38:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:38:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:38:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066677823] [2023-09-01 03:38:58,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066677823] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:38:58,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:38:58,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:38:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623032035] [2023-09-01 03:38:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:38:58,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:38:58,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:38:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:38:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:38:58,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-09-01 03:38:58,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:38:58,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-09-01 03:38:58,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:38:58,316 INFO L130 PetriNetUnfolder]: 2407/3016 cut-off events. [2023-09-01 03:38:58,316 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 03:38:58,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6044 conditions, 3016 events. 2407/3016 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10641 event pairs, 1124 based on Foata normal form. 0/1434 useless extension candidates. Maximal degree in co-relation 6041. Up to 2985 conditions per place. [2023-09-01 03:38:58,343 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-09-01 03:38:58,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-09-01 03:38:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:38:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:38:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-09-01 03:38:58,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4784172661870504 [2023-09-01 03:38:58,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-09-01 03:38:58,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-09-01 03:38:58,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:38:58,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-09-01 03:38:58,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,354 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 399 transitions. [2023-09-01 03:38:58,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-09-01 03:38:58,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 03:38:58,356 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-09-01 03:38:58,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-09-01 03:38:58,357 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-09-01 03:38:58,357 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-09-01 03:38:58,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:38:58,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:38:58,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 03:38:58,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:38:58,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:38:58,359 INFO L85 PathProgramCache]: Analyzing trace with hash 566676, now seen corresponding path program 1 times [2023-09-01 03:38:58,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:38:58,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763884067] [2023-09-01 03:38:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:38:58,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:38:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:38:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:38:58,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:38:58,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763884067] [2023-09-01 03:38:58,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763884067] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:38:58,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:38:58,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:38:58,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922318951] [2023-09-01 03:38:58,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:38:58,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:38:58,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:38:58,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:38:58,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:38:58,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 278 [2023-09-01 03:38:58,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:38:58,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 278 [2023-09-01 03:38:58,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:38:58,801 INFO L130 PetriNetUnfolder]: 2296/2875 cut-off events. [2023-09-01 03:38:58,801 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 03:38:58,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5764 conditions, 2875 events. 2296/2875 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10020 event pairs, 1069 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 5760. Up to 2844 conditions per place. [2023-09-01 03:38:58,816 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-09-01 03:38:58,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-09-01 03:38:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:38:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:38:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-09-01 03:38:58,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49760191846522783 [2023-09-01 03:38:58,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-09-01 03:38:58,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-09-01 03:38:58,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:38:58,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-09-01 03:38:58,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,822 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 415 transitions. [2023-09-01 03:38:58,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-09-01 03:38:58,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:38:58,824 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-09-01 03:38:58,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-09-01 03:38:58,826 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-09-01 03:38:58,829 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-09-01 03:38:58,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:38:58,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:38:58,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 03:38:58,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:38:58,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:38:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash 544587944, now seen corresponding path program 1 times [2023-09-01 03:38:58,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:38:58,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796553610] [2023-09-01 03:38:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:38:58,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:38:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:38:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:38:58,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:38:58,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796553610] [2023-09-01 03:38:58,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796553610] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:38:58,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:38:58,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:38:58,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22600058] [2023-09-01 03:38:58,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:38:58,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:38:58,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:38:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:38:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:38:58,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-09-01 03:38:58,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:58,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:38:58,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-09-01 03:38:58,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:38:59,181 INFO L130 PetriNetUnfolder]: 2251/2812 cut-off events. [2023-09-01 03:38:59,182 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 03:38:59,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5639 conditions, 2812 events. 2251/2812 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9750 event pairs, 1048 based on Foata normal form. 0/1354 useless extension candidates. Maximal degree in co-relation 5635. Up to 2781 conditions per place. [2023-09-01 03:38:59,196 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-09-01 03:38:59,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-09-01 03:38:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:38:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:38:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-09-01 03:38:59,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473621103117506 [2023-09-01 03:38:59,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-09-01 03:38:59,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-09-01 03:38:59,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:38:59,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-09-01 03:38:59,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,202 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 395 transitions. [2023-09-01 03:38:59,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-09-01 03:38:59,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:38:59,203 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-09-01 03:38:59,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-09-01 03:38:59,204 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-09-01 03:38:59,204 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-09-01 03:38:59,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:38:59,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:38:59,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 03:38:59,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:38:59,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:38:59,206 INFO L85 PathProgramCache]: Analyzing trace with hash 544587945, now seen corresponding path program 1 times [2023-09-01 03:38:59,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:38:59,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781361467] [2023-09-01 03:38:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:38:59,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:38:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:38:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:38:59,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:38:59,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781361467] [2023-09-01 03:38:59,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781361467] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:38:59,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:38:59,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:38:59,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172972910] [2023-09-01 03:38:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:38:59,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:38:59,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:38:59,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:38:59,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:38:59,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 278 [2023-09-01 03:38:59,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:38:59,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 278 [2023-09-01 03:38:59,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:38:59,494 INFO L130 PetriNetUnfolder]: 2206/2749 cut-off events. [2023-09-01 03:38:59,495 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 03:38:59,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5514 conditions, 2749 events. 2206/2749 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9468 event pairs, 1027 based on Foata normal form. 0/1330 useless extension candidates. Maximal degree in co-relation 5510. Up to 2718 conditions per place. [2023-09-01 03:38:59,506 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-09-01 03:38:59,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-09-01 03:38:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:38:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:38:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-09-01 03:38:59,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49280575539568344 [2023-09-01 03:38:59,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-09-01 03:38:59,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-09-01 03:38:59,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:38:59,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-09-01 03:38:59,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,511 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 411 transitions. [2023-09-01 03:38:59,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-09-01 03:38:59,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:38:59,512 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-09-01 03:38:59,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-09-01 03:38:59,513 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-09-01 03:38:59,513 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-09-01 03:38:59,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:38:59,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:38:59,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 03:38:59,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:38:59,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:38:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash -636983692, now seen corresponding path program 1 times [2023-09-01 03:38:59,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:38:59,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827397873] [2023-09-01 03:38:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:38:59,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:38:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:38:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:38:59,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:38:59,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827397873] [2023-09-01 03:38:59,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827397873] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:38:59,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:38:59,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:38:59,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621158558] [2023-09-01 03:38:59,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:38:59,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:38:59,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:38:59,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:38:59,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:38:59,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 278 [2023-09-01 03:38:59,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:38:59,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 278 [2023-09-01 03:38:59,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:38:59,766 INFO L130 PetriNetUnfolder]: 2103/2616 cut-off events. [2023-09-01 03:38:59,767 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 03:38:59,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5249 conditions, 2616 events. 2103/2616 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 8908 event pairs, 980 based on Foata normal form. 0/1283 useless extension candidates. Maximal degree in co-relation 5245. Up to 2585 conditions per place. [2023-09-01 03:38:59,778 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-09-01 03:38:59,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-09-01 03:38:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:38:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:38:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-09-01 03:38:59,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904076738609113 [2023-09-01 03:38:59,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-09-01 03:38:59,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-09-01 03:38:59,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:38:59,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-09-01 03:38:59,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,784 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 409 transitions. [2023-09-01 03:38:59,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-09-01 03:38:59,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:38:59,786 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-09-01 03:38:59,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-09-01 03:38:59,786 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -14 predicate places. [2023-09-01 03:38:59,787 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-09-01 03:38:59,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:38:59,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:38:59,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 03:38:59,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:38:59,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:38:59,788 INFO L85 PathProgramCache]: Analyzing trace with hash -636983693, now seen corresponding path program 1 times [2023-09-01 03:38:59,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:38:59,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70129827] [2023-09-01 03:38:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:38:59,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:38:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:38:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:38:59,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:38:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70129827] [2023-09-01 03:38:59,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70129827] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:38:59,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:38:59,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:38:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308846531] [2023-09-01 03:38:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:38:59,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:38:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:38:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:38:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:38:59,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-09-01 03:38:59,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:38:59,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-09-01 03:38:59,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:38:59,971 INFO L130 PetriNetUnfolder]: 2000/2483 cut-off events. [2023-09-01 03:38:59,972 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 03:38:59,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4984 conditions, 2483 events. 2000/2483 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 8348 event pairs, 933 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 4980. Up to 2452 conditions per place. [2023-09-01 03:38:59,981 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-09-01 03:38:59,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-09-01 03:38:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:38:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:38:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-09-01 03:38:59,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46642685851318944 [2023-09-01 03:38:59,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-09-01 03:38:59,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-09-01 03:38:59,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:38:59,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-09-01 03:38:59,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,986 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 389 transitions. [2023-09-01 03:38:59,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-09-01 03:38:59,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:38:59,987 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-09-01 03:38:59,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-09-01 03:38:59,988 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-09-01 03:38:59,988 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-09-01 03:38:59,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:38:59,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:38:59,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:38:59,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 03:38:59,989 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:38:59,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:38:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2039006695, now seen corresponding path program 1 times [2023-09-01 03:38:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:38:59,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965132753] [2023-09-01 03:38:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:38:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:00,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:00,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965132753] [2023-09-01 03:39:00,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965132753] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:00,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:00,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:39:00,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593763821] [2023-09-01 03:39:00,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:00,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:39:00,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:39:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:39:00,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 278 [2023-09-01 03:39:00,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:00,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 278 [2023-09-01 03:39:00,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:00,408 INFO L130 PetriNetUnfolder]: 1586/1988 cut-off events. [2023-09-01 03:39:00,408 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 03:39:00,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 1988 events. 1586/1988 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6524 event pairs, 735 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 3991. Up to 1957 conditions per place. [2023-09-01 03:39:00,415 INFO L137 encePairwiseOnDemand]: 276/278 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 03:39:00,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-09-01 03:39:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:39:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:39:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-09-01 03:39:00,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568345323741007 [2023-09-01 03:39:00,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-09-01 03:39:00,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-09-01 03:39:00,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:00,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-09-01 03:39:00,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,421 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 381 transitions. [2023-09-01 03:39:00,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-09-01 03:39:00,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:00,422 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-09-01 03:39:00,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-09-01 03:39:00,423 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-09-01 03:39:00,423 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-09-01 03:39:00,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:00,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:00,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 03:39:00,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:00,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2039006694, now seen corresponding path program 1 times [2023-09-01 03:39:00,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:00,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521850210] [2023-09-01 03:39:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:00,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:00,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:00,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521850210] [2023-09-01 03:39:00,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521850210] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:00,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:00,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:39:00,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120935147] [2023-09-01 03:39:00,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:00,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:39:00,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:39:00,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:39:00,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 278 [2023-09-01 03:39:00,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 109.5) internal successors, (657), 6 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:00,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 278 [2023-09-01 03:39:00,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:00,753 INFO L130 PetriNetUnfolder]: 1172/1493 cut-off events. [2023-09-01 03:39:00,756 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 03:39:00,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3006 conditions, 1493 events. 1172/1493 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4782 event pairs, 537 based on Foata normal form. 0/840 useless extension candidates. Maximal degree in co-relation 3002. Up to 1462 conditions per place. [2023-09-01 03:39:00,764 INFO L137 encePairwiseOnDemand]: 276/278 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-09-01 03:39:00,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-09-01 03:39:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:39:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:39:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-09-01 03:39:00,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196642685851319 [2023-09-01 03:39:00,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-09-01 03:39:00,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-09-01 03:39:00,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:00,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-09-01 03:39:00,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,768 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 350 transitions. [2023-09-01 03:39:00,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-09-01 03:39:00,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:00,769 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-09-01 03:39:00,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-09-01 03:39:00,770 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-09-01 03:39:00,770 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-09-01 03:39:00,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.5) internal successors, (657), 6 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:00,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:00,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 03:39:00,771 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:00,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:00,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2084028512, now seen corresponding path program 1 times [2023-09-01 03:39:00,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:00,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103979017] [2023-09-01 03:39:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:00,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:00,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103979017] [2023-09-01 03:39:00,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103979017] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:00,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:00,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:39:00,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743700383] [2023-09-01 03:39:00,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:00,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:39:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:39:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:39:00,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 278 [2023-09-01 03:39:00,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:00,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:00,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 278 [2023-09-01 03:39:00,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:01,062 INFO L130 PetriNetUnfolder]: 1343/1736 cut-off events. [2023-09-01 03:39:01,063 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 03:39:01,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3516 conditions, 1736 events. 1343/1736 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5871 event pairs, 215 based on Foata normal form. 1/1043 useless extension candidates. Maximal degree in co-relation 3512. Up to 1515 conditions per place. [2023-09-01 03:39:01,068 INFO L137 encePairwiseOnDemand]: 272/278 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-09-01 03:39:01,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 212 flow [2023-09-01 03:39:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:39:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:39:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-09-01 03:39:01,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5179856115107914 [2023-09-01 03:39:01,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-09-01 03:39:01,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-09-01 03:39:01,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:01,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-09-01 03:39:01,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,074 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 432 transitions. [2023-09-01 03:39:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 212 flow [2023-09-01 03:39:01,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:01,076 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 97 flow [2023-09-01 03:39:01,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-09-01 03:39:01,076 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-09-01 03:39:01,077 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 97 flow [2023-09-01 03:39:01,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:01,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:01,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 03:39:01,078 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:01,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:01,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1296728902, now seen corresponding path program 1 times [2023-09-01 03:39:01,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:01,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740595164] [2023-09-01 03:39:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:01,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:01,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:01,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740595164] [2023-09-01 03:39:01,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740595164] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:01,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:01,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:39:01,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132413387] [2023-09-01 03:39:01,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:01,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:39:01,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:39:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:39:01,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-09-01 03:39:01,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:01,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-09-01 03:39:01,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:01,508 INFO L130 PetriNetUnfolder]: 1964/2742 cut-off events. [2023-09-01 03:39:01,509 INFO L131 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2023-09-01 03:39:01,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6376 conditions, 2742 events. 1964/2742 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12439 event pairs, 503 based on Foata normal form. 304/2992 useless extension candidates. Maximal degree in co-relation 6371. Up to 1387 conditions per place. [2023-09-01 03:39:01,521 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 74 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2023-09-01 03:39:01,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 82 transitions, 392 flow [2023-09-01 03:39:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:39:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:39:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 682 transitions. [2023-09-01 03:39:01,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906474820143885 [2023-09-01 03:39:01,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 682 transitions. [2023-09-01 03:39:01,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 682 transitions. [2023-09-01 03:39:01,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:01,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 682 transitions. [2023-09-01 03:39:01,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,528 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,529 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 97 flow. Second operand 5 states and 682 transitions. [2023-09-01 03:39:01,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 82 transitions, 392 flow [2023-09-01 03:39:01,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:01,531 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 142 flow [2023-09-01 03:39:01,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-09-01 03:39:01,532 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-09-01 03:39:01,532 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 142 flow [2023-09-01 03:39:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:01,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:01,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 03:39:01,533 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:01,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1396144016, now seen corresponding path program 2 times [2023-09-01 03:39:01,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:01,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758597211] [2023-09-01 03:39:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:01,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:01,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758597211] [2023-09-01 03:39:01,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758597211] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:01,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:01,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:39:01,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441992481] [2023-09-01 03:39:01,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:01,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:39:01,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:01,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:39:01,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:39:01,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 278 [2023-09-01 03:39:01,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:01,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 278 [2023-09-01 03:39:01,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:01,903 INFO L130 PetriNetUnfolder]: 1807/2576 cut-off events. [2023-09-01 03:39:01,903 INFO L131 PetriNetUnfolder]: For 3111/3434 co-relation queries the response was YES. [2023-09-01 03:39:01,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 2576 events. 1807/2576 cut-off events. For 3111/3434 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12028 event pairs, 523 based on Foata normal form. 397/2926 useless extension candidates. Maximal degree in co-relation 7762. Up to 1640 conditions per place. [2023-09-01 03:39:01,915 INFO L137 encePairwiseOnDemand]: 274/278 looper letters, 54 selfloop transitions, 4 changer transitions 7/69 dead transitions. [2023-09-01 03:39:01,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 389 flow [2023-09-01 03:39:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:39:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:39:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-09-01 03:39:01,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49460431654676257 [2023-09-01 03:39:01,917 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-09-01 03:39:01,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-09-01 03:39:01,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:01,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-09-01 03:39:01,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,921 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 142 flow. Second operand 4 states and 550 transitions. [2023-09-01 03:39:01,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 389 flow [2023-09-01 03:39:01,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 382 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:01,929 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 168 flow [2023-09-01 03:39:01,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2023-09-01 03:39:01,931 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2023-09-01 03:39:01,931 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 168 flow [2023-09-01 03:39:01,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:01,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:01,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:01,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 03:39:01,932 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:01,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1002958456, now seen corresponding path program 3 times [2023-09-01 03:39:01,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:01,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923937234] [2023-09-01 03:39:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:01,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:02,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:02,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923937234] [2023-09-01 03:39:02,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923937234] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:02,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:02,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:39:02,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367507449] [2023-09-01 03:39:02,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:02,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:39:02,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:02,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:39:02,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:39:02,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-09-01 03:39:02,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:02,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-09-01 03:39:02,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:02,408 INFO L130 PetriNetUnfolder]: 2101/3191 cut-off events. [2023-09-01 03:39:02,408 INFO L131 PetriNetUnfolder]: For 7172/7798 co-relation queries the response was YES. [2023-09-01 03:39:02,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9834 conditions, 3191 events. 2101/3191 cut-off events. For 7172/7798 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16380 event pairs, 795 based on Foata normal form. 782/3948 useless extension candidates. Maximal degree in co-relation 9824. Up to 1821 conditions per place. [2023-09-01 03:39:02,420 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 78 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-09-01 03:39:02,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 539 flow [2023-09-01 03:39:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:39:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:39:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 674 transitions. [2023-09-01 03:39:02,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4848920863309353 [2023-09-01 03:39:02,422 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 674 transitions. [2023-09-01 03:39:02,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 674 transitions. [2023-09-01 03:39:02,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:02,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 674 transitions. [2023-09-01 03:39:02,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,425 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,425 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 168 flow. Second operand 5 states and 674 transitions. [2023-09-01 03:39:02,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 539 flow [2023-09-01 03:39:02,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 531 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:02,430 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 236 flow [2023-09-01 03:39:02,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-09-01 03:39:02,431 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-09-01 03:39:02,431 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 236 flow [2023-09-01 03:39:02,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:02,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:02,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 03:39:02,432 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:02,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:02,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1261806454, now seen corresponding path program 4 times [2023-09-01 03:39:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:02,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497872030] [2023-09-01 03:39:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:02,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:02,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497872030] [2023-09-01 03:39:02,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497872030] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:02,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:02,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:39:02,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419465511] [2023-09-01 03:39:02,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:02,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:39:02,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:39:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:39:02,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 278 [2023-09-01 03:39:02,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:02,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 278 [2023-09-01 03:39:02,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:02,850 INFO L130 PetriNetUnfolder]: 2291/3471 cut-off events. [2023-09-01 03:39:02,851 INFO L131 PetriNetUnfolder]: For 13548/14183 co-relation queries the response was YES. [2023-09-01 03:39:02,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13309 conditions, 3471 events. 2291/3471 cut-off events. For 13548/14183 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18061 event pairs, 795 based on Foata normal form. 652/4013 useless extension candidates. Maximal degree in co-relation 13296. Up to 1589 conditions per place. [2023-09-01 03:39:02,869 INFO L137 encePairwiseOnDemand]: 272/278 looper letters, 63 selfloop transitions, 10 changer transitions 1/81 dead transitions. [2023-09-01 03:39:02,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 621 flow [2023-09-01 03:39:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:39:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:39:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-09-01 03:39:02,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49460431654676257 [2023-09-01 03:39:02,871 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-09-01 03:39:02,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-09-01 03:39:02,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:02,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-09-01 03:39:02,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,876 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,876 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 236 flow. Second operand 4 states and 550 transitions. [2023-09-01 03:39:02,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 621 flow [2023-09-01 03:39:02,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 611 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:02,886 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 377 flow [2023-09-01 03:39:02,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=377, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2023-09-01 03:39:02,886 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-09-01 03:39:02,886 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 377 flow [2023-09-01 03:39:02,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:02,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:02,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 03:39:02,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:02,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:02,888 INFO L85 PathProgramCache]: Analyzing trace with hash 631474676, now seen corresponding path program 5 times [2023-09-01 03:39:02,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:02,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128628794] [2023-09-01 03:39:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:02,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:02,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:02,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128628794] [2023-09-01 03:39:02,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128628794] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:02,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:02,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 03:39:02,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146065040] [2023-09-01 03:39:02,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:02,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:39:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:02,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:39:02,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:39:02,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 278 [2023-09-01 03:39:02,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:02,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:02,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 278 [2023-09-01 03:39:02,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:03,344 INFO L130 PetriNetUnfolder]: 2297/3339 cut-off events. [2023-09-01 03:39:03,344 INFO L131 PetriNetUnfolder]: For 17091/17811 co-relation queries the response was YES. [2023-09-01 03:39:03,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14981 conditions, 3339 events. 2297/3339 cut-off events. For 17091/17811 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 16169 event pairs, 647 based on Foata normal form. 725/3981 useless extension candidates. Maximal degree in co-relation 14966. Up to 1928 conditions per place. [2023-09-01 03:39:03,366 INFO L137 encePairwiseOnDemand]: 273/278 looper letters, 61 selfloop transitions, 7 changer transitions 10/83 dead transitions. [2023-09-01 03:39:03,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 693 flow [2023-09-01 03:39:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:39:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:39:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-09-01 03:39:03,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49460431654676257 [2023-09-01 03:39:03,369 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-09-01 03:39:03,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-09-01 03:39:03,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:03,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-09-01 03:39:03,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:03,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:03,374 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:03,374 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 377 flow. Second operand 4 states and 550 transitions. [2023-09-01 03:39:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 693 flow [2023-09-01 03:39:03,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 654 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:03,387 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 368 flow [2023-09-01 03:39:03,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=368, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-09-01 03:39:03,387 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-09-01 03:39:03,387 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 368 flow [2023-09-01 03:39:03,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:03,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:03,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:03,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 03:39:03,388 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:03,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:03,389 INFO L85 PathProgramCache]: Analyzing trace with hash 456940982, now seen corresponding path program 1 times [2023-09-01 03:39:03,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:03,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713124083] [2023-09-01 03:39:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:03,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:39:03,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:03,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713124083] [2023-09-01 03:39:03,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713124083] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:03,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:03,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:39:03,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791010900] [2023-09-01 03:39:03,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:03,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:39:03,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:03,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:39:03,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:39:03,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-09-01 03:39:03,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 368 flow. Second operand has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:03,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:03,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-09-01 03:39:03,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:04,026 INFO L130 PetriNetUnfolder]: 3037/4299 cut-off events. [2023-09-01 03:39:04,026 INFO L131 PetriNetUnfolder]: For 31811/32782 co-relation queries the response was YES. [2023-09-01 03:39:04,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18865 conditions, 4299 events. 3037/4299 cut-off events. For 31811/32782 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21100 event pairs, 1125 based on Foata normal form. 1145/5353 useless extension candidates. Maximal degree in co-relation 18848. Up to 3011 conditions per place. [2023-09-01 03:39:04,058 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 79 selfloop transitions, 7 changer transitions 12/101 dead transitions. [2023-09-01 03:39:04,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 101 transitions, 872 flow [2023-09-01 03:39:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:39:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:39:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-09-01 03:39:04,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841726618705036 [2023-09-01 03:39:04,061 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-09-01 03:39:04,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-09-01 03:39:04,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:04,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-09-01 03:39:04,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:04,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:04,066 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:04,066 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 368 flow. Second operand 5 states and 673 transitions. [2023-09-01 03:39:04,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 101 transitions, 872 flow [2023-09-01 03:39:04,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 101 transitions, 830 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 03:39:04,080 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 427 flow [2023-09-01 03:39:04,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-09-01 03:39:04,081 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2023-09-01 03:39:04,081 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 427 flow [2023-09-01 03:39:04,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:04,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:04,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:04,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 03:39:04,082 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:04,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:04,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1078285420, now seen corresponding path program 1 times [2023-09-01 03:39:04,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:04,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352892163] [2023-09-01 03:39:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:04,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:04,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:04,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352892163] [2023-09-01 03:39:04,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352892163] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:39:04,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279024506] [2023-09-01 03:39:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:04,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:39:04,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:39:04,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 03:39:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:39:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:39:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:04,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:39:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:04,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279024506] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:39:04,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:39:04,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 03:39:04,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716600548] [2023-09-01 03:39:04,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:39:04,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 03:39:04,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 03:39:04,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 03:39:04,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 278 [2023-09-01 03:39:04,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 427 flow. Second operand has 11 states, 11 states have (on average 120.0) internal successors, (1320), 11 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:04,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:04,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 278 [2023-09-01 03:39:04,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:05,261 INFO L130 PetriNetUnfolder]: 5106/6928 cut-off events. [2023-09-01 03:39:05,261 INFO L131 PetriNetUnfolder]: For 51387/51980 co-relation queries the response was YES. [2023-09-01 03:39:05,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36586 conditions, 6928 events. 5106/6928 cut-off events. For 51387/51980 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31389 event pairs, 1032 based on Foata normal form. 1120/8038 useless extension candidates. Maximal degree in co-relation 36568. Up to 3307 conditions per place. [2023-09-01 03:39:05,295 INFO L137 encePairwiseOnDemand]: 269/278 looper letters, 143 selfloop transitions, 37 changer transitions 14/196 dead transitions. [2023-09-01 03:39:05,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 196 transitions, 1934 flow [2023-09-01 03:39:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:39:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:39:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1421 transitions. [2023-09-01 03:39:05,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4646827992151733 [2023-09-01 03:39:05,312 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1421 transitions. [2023-09-01 03:39:05,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1421 transitions. [2023-09-01 03:39:05,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:05,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1421 transitions. [2023-09-01 03:39:05,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 129.1818181818182) internal successors, (1421), 11 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:05,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 278.0) internal successors, (3336), 12 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:05,383 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 278.0) internal successors, (3336), 12 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:05,383 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 427 flow. Second operand 11 states and 1421 transitions. [2023-09-01 03:39:05,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 196 transitions, 1934 flow [2023-09-01 03:39:05,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 196 transitions, 1787 flow, removed 66 selfloop flow, removed 2 redundant places. [2023-09-01 03:39:05,431 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 820 flow [2023-09-01 03:39:05,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=820, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-09-01 03:39:05,431 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2023-09-01 03:39:05,436 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 820 flow [2023-09-01 03:39:05,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.0) internal successors, (1320), 11 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:05,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:05,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:05,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:39:05,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 03:39:05,643 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:05,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:05,643 INFO L85 PathProgramCache]: Analyzing trace with hash -829438692, now seen corresponding path program 2 times [2023-09-01 03:39:05,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:05,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880515539] [2023-09-01 03:39:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:05,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:39:05,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:05,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880515539] [2023-09-01 03:39:05,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880515539] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:05,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:05,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:39:05,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101090759] [2023-09-01 03:39:05,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:05,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:39:05,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:05,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:39:05,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:39:05,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 278 [2023-09-01 03:39:05,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 820 flow. Second operand has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:05,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:05,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 278 [2023-09-01 03:39:05,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:06,267 INFO L130 PetriNetUnfolder]: 4711/6351 cut-off events. [2023-09-01 03:39:06,268 INFO L131 PetriNetUnfolder]: For 66535/67770 co-relation queries the response was YES. [2023-09-01 03:39:06,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37627 conditions, 6351 events. 4711/6351 cut-off events. For 66535/67770 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 28627 event pairs, 1915 based on Foata normal form. 1033/7221 useless extension candidates. Maximal degree in co-relation 37604. Up to 5558 conditions per place. [2023-09-01 03:39:06,302 INFO L137 encePairwiseOnDemand]: 273/278 looper letters, 78 selfloop transitions, 17 changer transitions 7/108 dead transitions. [2023-09-01 03:39:06,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 1329 flow [2023-09-01 03:39:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:39:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:39:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-09-01 03:39:06,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46690647482014386 [2023-09-01 03:39:06,304 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-09-01 03:39:06,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-09-01 03:39:06,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:06,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-09-01 03:39:06,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:06,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:06,308 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:06,308 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 820 flow. Second operand 5 states and 649 transitions. [2023-09-01 03:39:06,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 1329 flow [2023-09-01 03:39:06,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 1150 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-09-01 03:39:06,336 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 780 flow [2023-09-01 03:39:06,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=780, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-09-01 03:39:06,337 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2023-09-01 03:39:06,337 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 780 flow [2023-09-01 03:39:06,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:06,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:06,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:06,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 03:39:06,338 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:06,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:06,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1491670694, now seen corresponding path program 3 times [2023-09-01 03:39:06,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:06,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412478589] [2023-09-01 03:39:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:06,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:39:06,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412478589] [2023-09-01 03:39:06,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412478589] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:39:06,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:39:06,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:39:06,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920226865] [2023-09-01 03:39:06,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:39:06,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:39:06,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:06,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:39:06,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:39:06,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-09-01 03:39:06,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 780 flow. Second operand has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:06,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:06,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-09-01 03:39:06,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:06,976 INFO L130 PetriNetUnfolder]: 4234/5660 cut-off events. [2023-09-01 03:39:06,976 INFO L131 PetriNetUnfolder]: For 48413/49431 co-relation queries the response was YES. [2023-09-01 03:39:06,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32009 conditions, 5660 events. 4234/5660 cut-off events. For 48413/49431 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 24820 event pairs, 1362 based on Foata normal form. 907/6442 useless extension candidates. Maximal degree in co-relation 31987. Up to 4090 conditions per place. [2023-09-01 03:39:07,011 INFO L137 encePairwiseOnDemand]: 273/278 looper letters, 74 selfloop transitions, 18 changer transitions 11/109 dead transitions. [2023-09-01 03:39:07,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 109 transitions, 1196 flow [2023-09-01 03:39:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:39:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:39:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-09-01 03:39:07,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47050359712230216 [2023-09-01 03:39:07,021 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-09-01 03:39:07,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-09-01 03:39:07,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:07,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-09-01 03:39:07,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:07,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:07,036 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:07,036 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 780 flow. Second operand 5 states and 654 transitions. [2023-09-01 03:39:07,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 109 transitions, 1196 flow [2023-09-01 03:39:07,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 1169 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:07,069 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 820 flow [2023-09-01 03:39:07,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=820, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-09-01 03:39:07,070 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2023-09-01 03:39:07,070 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 820 flow [2023-09-01 03:39:07,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:07,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:07,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:07,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 03:39:07,071 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:07,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:07,071 INFO L85 PathProgramCache]: Analyzing trace with hash 756304230, now seen corresponding path program 1 times [2023-09-01 03:39:07,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:07,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061915253] [2023-09-01 03:39:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:07,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:39:07,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:07,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061915253] [2023-09-01 03:39:07,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061915253] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:39:07,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734709042] [2023-09-01 03:39:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:07,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:07,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:39:07,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:39:07,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 03:39:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:07,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:39:07,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:39:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:39:07,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:39:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:39:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734709042] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:39:07,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:39:07,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-09-01 03:39:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469399446] [2023-09-01 03:39:07,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:39:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 03:39:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 03:39:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 03:39:07,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 278 [2023-09-01 03:39:07,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 820 flow. Second operand has 7 states, 7 states have (on average 124.85714285714286) internal successors, (874), 7 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:07,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:07,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 278 [2023-09-01 03:39:07,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:07,979 INFO L130 PetriNetUnfolder]: 5872/7758 cut-off events. [2023-09-01 03:39:07,979 INFO L131 PetriNetUnfolder]: For 72013/72996 co-relation queries the response was YES. [2023-09-01 03:39:07,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45975 conditions, 7758 events. 5872/7758 cut-off events. For 72013/72996 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33772 event pairs, 1414 based on Foata normal form. 1008/8716 useless extension candidates. Maximal degree in co-relation 45950. Up to 4590 conditions per place. [2023-09-01 03:39:08,021 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 146 selfloop transitions, 66 changer transitions 3/221 dead transitions. [2023-09-01 03:39:08,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 221 transitions, 2703 flow [2023-09-01 03:39:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:39:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:39:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1055 transitions. [2023-09-01 03:39:08,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743705035971223 [2023-09-01 03:39:08,024 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1055 transitions. [2023-09-01 03:39:08,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1055 transitions. [2023-09-01 03:39:08,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:08,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1055 transitions. [2023-09-01 03:39:08,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.875) internal successors, (1055), 8 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:08,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 278.0) internal successors, (2502), 9 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:08,029 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 278.0) internal successors, (2502), 9 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:08,029 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 820 flow. Second operand 8 states and 1055 transitions. [2023-09-01 03:39:08,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 221 transitions, 2703 flow [2023-09-01 03:39:08,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 221 transitions, 2589 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-09-01 03:39:08,099 INFO L231 Difference]: Finished difference. Result has 87 places, 126 transitions, 1630 flow [2023-09-01 03:39:08,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1630, PETRI_PLACES=87, PETRI_TRANSITIONS=126} [2023-09-01 03:39:08,100 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2023-09-01 03:39:08,100 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 126 transitions, 1630 flow [2023-09-01 03:39:08,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.85714285714286) internal successors, (874), 7 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:08,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:08,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:08,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:39:08,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-09-01 03:39:08,305 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:08,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:08,306 INFO L85 PathProgramCache]: Analyzing trace with hash 661390484, now seen corresponding path program 2 times [2023-09-01 03:39:08,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:08,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771319382] [2023-09-01 03:39:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:39:08,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:08,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771319382] [2023-09-01 03:39:08,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771319382] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:39:08,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545900484] [2023-09-01 03:39:08,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:39:08,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:08,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:39:08,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:39:08,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 03:39:08,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:39:08,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:39:08,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:39:08,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:39:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:39:08,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:39:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 03:39:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545900484] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:39:08,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:39:08,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 03:39:08,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238016144] [2023-09-01 03:39:08,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:39:08,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:39:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:39:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:39:08,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 278 [2023-09-01 03:39:08,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 126 transitions, 1630 flow. Second operand has 8 states, 8 states have (on average 123.375) internal successors, (987), 8 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:08,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:08,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 278 [2023-09-01 03:39:08,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:09,415 INFO L130 PetriNetUnfolder]: 6144/8011 cut-off events. [2023-09-01 03:39:09,416 INFO L131 PetriNetUnfolder]: For 91022/91991 co-relation queries the response was YES. [2023-09-01 03:39:09,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51944 conditions, 8011 events. 6144/8011 cut-off events. For 91022/91991 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 33998 event pairs, 1128 based on Foata normal form. 1034/9022 useless extension candidates. Maximal degree in co-relation 51917. Up to 4791 conditions per place. [2023-09-01 03:39:09,482 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 106 selfloop transitions, 97 changer transitions 2/211 dead transitions. [2023-09-01 03:39:09,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 211 transitions, 3002 flow [2023-09-01 03:39:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:39:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:39:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 789 transitions. [2023-09-01 03:39:09,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47302158273381295 [2023-09-01 03:39:09,487 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 789 transitions. [2023-09-01 03:39:09,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 789 transitions. [2023-09-01 03:39:09,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:09,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 789 transitions. [2023-09-01 03:39:09,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 131.5) internal successors, (789), 6 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:09,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:09,491 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:09,492 INFO L175 Difference]: Start difference. First operand has 87 places, 126 transitions, 1630 flow. Second operand 6 states and 789 transitions. [2023-09-01 03:39:09,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 211 transitions, 3002 flow [2023-09-01 03:39:09,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 211 transitions, 2974 flow, removed 14 selfloop flow, removed 0 redundant places. [2023-09-01 03:39:09,693 INFO L231 Difference]: Finished difference. Result has 95 places, 165 transitions, 2522 flow [2023-09-01 03:39:09,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2522, PETRI_PLACES=95, PETRI_TRANSITIONS=165} [2023-09-01 03:39:09,694 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2023-09-01 03:39:09,694 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 165 transitions, 2522 flow [2023-09-01 03:39:09,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 123.375) internal successors, (987), 8 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:09,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:09,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:09,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:39:09,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:09,901 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:09,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:09,902 INFO L85 PathProgramCache]: Analyzing trace with hash -261321058, now seen corresponding path program 1 times [2023-09-01 03:39:09,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:09,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440572093] [2023-09-01 03:39:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:09,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:10,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:10,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440572093] [2023-09-01 03:39:10,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440572093] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:39:10,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205850387] [2023-09-01 03:39:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:10,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:10,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:39:10,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:39:10,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 03:39:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:10,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:39:10,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:39:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:10,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:39:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:10,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205850387] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:39:10,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:39:10,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-09-01 03:39:10,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225078287] [2023-09-01 03:39:10,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:39:10,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:39:10,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:10,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:39:10,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:39:10,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 278 [2023-09-01 03:39:10,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 165 transitions, 2522 flow. Second operand has 12 states, 12 states have (on average 121.83333333333333) internal successors, (1462), 12 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:10,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:10,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 278 [2023-09-01 03:39:10,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:12,408 INFO L130 PetriNetUnfolder]: 12474/16661 cut-off events. [2023-09-01 03:39:12,409 INFO L131 PetriNetUnfolder]: For 245920/249917 co-relation queries the response was YES. [2023-09-01 03:39:12,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116865 conditions, 16661 events. 12474/16661 cut-off events. For 245920/249917 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 84355 event pairs, 1184 based on Foata normal form. 3518/19527 useless extension candidates. Maximal degree in co-relation 116834. Up to 9573 conditions per place. [2023-09-01 03:39:12,550 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 180 selfloop transitions, 179 changer transitions 3/373 dead transitions. [2023-09-01 03:39:12,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 373 transitions, 5972 flow [2023-09-01 03:39:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:39:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:39:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 811 transitions. [2023-09-01 03:39:12,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4862110311750599 [2023-09-01 03:39:12,553 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 811 transitions. [2023-09-01 03:39:12,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 811 transitions. [2023-09-01 03:39:12,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:12,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 811 transitions. [2023-09-01 03:39:12,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.16666666666666) internal successors, (811), 6 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:12,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:12,558 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:12,558 INFO L175 Difference]: Start difference. First operand has 95 places, 165 transitions, 2522 flow. Second operand 6 states and 811 transitions. [2023-09-01 03:39:12,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 373 transitions, 5972 flow [2023-09-01 03:39:12,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 373 transitions, 5373 flow, removed 198 selfloop flow, removed 4 redundant places. [2023-09-01 03:39:12,801 INFO L231 Difference]: Finished difference. Result has 99 places, 305 transitions, 5241 flow [2023-09-01 03:39:12,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5241, PETRI_PLACES=99, PETRI_TRANSITIONS=305} [2023-09-01 03:39:12,801 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2023-09-01 03:39:12,802 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 305 transitions, 5241 flow [2023-09-01 03:39:12,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 121.83333333333333) internal successors, (1462), 12 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:12,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:12,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:12,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:39:13,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:13,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:13,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:13,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1861405730, now seen corresponding path program 2 times [2023-09-01 03:39:13,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:13,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107766563] [2023-09-01 03:39:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:13,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:13,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:13,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107766563] [2023-09-01 03:39:13,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107766563] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:39:13,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454674182] [2023-09-01 03:39:13,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:39:13,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:13,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:39:13,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:39:13,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 03:39:13,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:39:13,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:39:13,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 03:39:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:39:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:13,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:39:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:13,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454674182] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:39:13,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:39:13,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2023-09-01 03:39:13,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754353515] [2023-09-01 03:39:13,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:39:13,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 03:39:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 03:39:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-09-01 03:39:13,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 278 [2023-09-01 03:39:13,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 305 transitions, 5241 flow. Second operand has 17 states, 17 states have (on average 117.70588235294117) internal successors, (2001), 17 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:13,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:13,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 278 [2023-09-01 03:39:13,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:20,473 INFO L130 PetriNetUnfolder]: 31868/43369 cut-off events. [2023-09-01 03:39:20,474 INFO L131 PetriNetUnfolder]: For 680915/688871 co-relation queries the response was YES. [2023-09-01 03:39:20,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313847 conditions, 43369 events. 31868/43369 cut-off events. For 680915/688871 co-relation queries the response was YES. Maximal size of possible extension queue 1896. Compared 257993 event pairs, 1801 based on Foata normal form. 6442/49280 useless extension candidates. Maximal degree in co-relation 313814. Up to 22929 conditions per place. [2023-09-01 03:39:21,084 INFO L137 encePairwiseOnDemand]: 268/278 looper letters, 334 selfloop transitions, 769 changer transitions 6/1118 dead transitions. [2023-09-01 03:39:21,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 1118 transitions, 18698 flow [2023-09-01 03:39:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 03:39:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 03:39:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2732 transitions. [2023-09-01 03:39:21,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679684823569716 [2023-09-01 03:39:21,090 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2732 transitions. [2023-09-01 03:39:21,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2732 transitions. [2023-09-01 03:39:21,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:21,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2732 transitions. [2023-09-01 03:39:21,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 130.0952380952381) internal successors, (2732), 21 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:21,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 278.0) internal successors, (6116), 22 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:21,099 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 278.0) internal successors, (6116), 22 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:21,099 INFO L175 Difference]: Start difference. First operand has 99 places, 305 transitions, 5241 flow. Second operand 21 states and 2732 transitions. [2023-09-01 03:39:21,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 1118 transitions, 18698 flow [2023-09-01 03:39:22,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 1118 transitions, 17932 flow, removed 383 selfloop flow, removed 0 redundant places. [2023-09-01 03:39:22,362 INFO L231 Difference]: Finished difference. Result has 125 places, 893 transitions, 17296 flow [2023-09-01 03:39:22,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=4839, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=17296, PETRI_PLACES=125, PETRI_TRANSITIONS=893} [2023-09-01 03:39:22,363 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2023-09-01 03:39:22,363 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 893 transitions, 17296 flow [2023-09-01 03:39:22,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 117.70588235294117) internal successors, (2001), 17 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:22,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:22,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:22,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 03:39:22,570 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,SelfDestructingSolverStorable22 [2023-09-01 03:39:22,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:22,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:22,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1379169044, now seen corresponding path program 3 times [2023-09-01 03:39:22,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:22,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076634903] [2023-09-01 03:39:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:22,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:39:22,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:22,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076634903] [2023-09-01 03:39:22,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076634903] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:39:22,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96616384] [2023-09-01 03:39:22,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:39:22,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:22,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:39:22,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:39:22,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 03:39:22,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:39:22,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:39:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:39:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:39:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:39:22,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:39:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:39:22,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96616384] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:39:22,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:39:22,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 03:39:22,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151692960] [2023-09-01 03:39:22,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:39:22,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:39:22,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:22,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:39:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:39:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 278 [2023-09-01 03:39:23,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 893 transitions, 17296 flow. Second operand has 12 states, 12 states have (on average 124.5) internal successors, (1494), 12 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:23,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:23,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 278 [2023-09-01 03:39:23,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:39:35,536 INFO L130 PetriNetUnfolder]: 45529/63213 cut-off events. [2023-09-01 03:39:35,536 INFO L131 PetriNetUnfolder]: For 1292498/1299909 co-relation queries the response was YES. [2023-09-01 03:39:35,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481827 conditions, 63213 events. 45529/63213 cut-off events. For 1292498/1299909 co-relation queries the response was YES. Maximal size of possible extension queue 2774. Compared 414919 event pairs, 5762 based on Foata normal form. 7252/70031 useless extension candidates. Maximal degree in co-relation 481787. Up to 26483 conditions per place. [2023-09-01 03:39:36,486 INFO L137 encePairwiseOnDemand]: 272/278 looper letters, 1478 selfloop transitions, 525 changer transitions 287/2298 dead transitions. [2023-09-01 03:39:36,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 2298 transitions, 46870 flow [2023-09-01 03:39:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:39:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:39:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1619 transitions. [2023-09-01 03:39:36,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48531175059952036 [2023-09-01 03:39:36,490 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1619 transitions. [2023-09-01 03:39:36,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1619 transitions. [2023-09-01 03:39:36,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:39:36,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1619 transitions. [2023-09-01 03:39:36,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 134.91666666666666) internal successors, (1619), 12 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:36,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 278.0) internal successors, (3614), 13 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:36,498 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 278.0) internal successors, (3614), 13 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:36,498 INFO L175 Difference]: Start difference. First operand has 125 places, 893 transitions, 17296 flow. Second operand 12 states and 1619 transitions. [2023-09-01 03:39:36,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 2298 transitions, 46870 flow [2023-09-01 03:39:47,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 2298 transitions, 38513 flow, removed 4139 selfloop flow, removed 1 redundant places. [2023-09-01 03:39:47,556 INFO L231 Difference]: Finished difference. Result has 141 places, 1145 transitions, 20108 flow [2023-09-01 03:39:47,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=13798, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20108, PETRI_PLACES=141, PETRI_TRANSITIONS=1145} [2023-09-01 03:39:47,571 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2023-09-01 03:39:47,571 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 1145 transitions, 20108 flow [2023-09-01 03:39:47,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 124.5) internal successors, (1494), 12 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:47,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:39:47,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:39:47,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:39:47,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:47,778 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:39:47,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:39:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash 377423300, now seen corresponding path program 4 times [2023-09-01 03:39:47,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:39:47,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859201753] [2023-09-01 03:39:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:39:47,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:39:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:39:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:39:47,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:39:47,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859201753] [2023-09-01 03:39:47,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859201753] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:39:47,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745046344] [2023-09-01 03:39:47,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:39:47,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:39:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:39:47,929 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:39:47,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 03:39:48,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:39:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:39:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:39:48,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:39:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:39:48,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:39:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:39:48,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745046344] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:39:48,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:39:48,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-09-01 03:39:48,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280608199] [2023-09-01 03:39:48,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:39:48,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 03:39:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:39:48,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 03:39:48,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-09-01 03:39:48,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 278 [2023-09-01 03:39:48,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 1145 transitions, 20108 flow. Second operand has 15 states, 15 states have (on average 120.46666666666667) internal successors, (1807), 15 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:39:48,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:39:48,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 278 [2023-09-01 03:39:48,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:40:17,379 INFO L130 PetriNetUnfolder]: 93996/129885 cut-off events. [2023-09-01 03:40:17,379 INFO L131 PetriNetUnfolder]: For 2238021/2244344 co-relation queries the response was YES. [2023-09-01 03:40:18,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954958 conditions, 129885 events. 93996/129885 cut-off events. For 2238021/2244344 co-relation queries the response was YES. Maximal size of possible extension queue 4649. Compared 889580 event pairs, 11677 based on Foata normal form. 15584/145018 useless extension candidates. Maximal degree in co-relation 954912. Up to 44303 conditions per place. [2023-09-01 03:40:18,965 INFO L137 encePairwiseOnDemand]: 268/278 looper letters, 2437 selfloop transitions, 1455 changer transitions 20/3917 dead transitions. [2023-09-01 03:40:18,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 3917 transitions, 71949 flow [2023-09-01 03:40:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 03:40:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 03:40:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5323 transitions. [2023-09-01 03:40:18,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46701175644849974 [2023-09-01 03:40:18,970 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5323 transitions. [2023-09-01 03:40:18,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5323 transitions. [2023-09-01 03:40:18,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:40:18,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5323 transitions. [2023-09-01 03:40:18,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 129.82926829268294) internal successors, (5323), 41 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:40:18,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 278.0) internal successors, (11676), 42 states have internal predecessors, (11676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:40:18,983 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 278.0) internal successors, (11676), 42 states have internal predecessors, (11676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:40:18,983 INFO L175 Difference]: Start difference. First operand has 141 places, 1145 transitions, 20108 flow. Second operand 41 states and 5323 transitions. [2023-09-01 03:40:18,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 3917 transitions, 71949 flow [2023-09-01 03:40:54,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 3917 transitions, 70991 flow, removed 479 selfloop flow, removed 2 redundant places. [2023-09-01 03:40:54,624 INFO L231 Difference]: Finished difference. Result has 208 places, 2413 transitions, 50679 flow [2023-09-01 03:40:54,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=19712, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=50679, PETRI_PLACES=208, PETRI_TRANSITIONS=2413} [2023-09-01 03:40:54,625 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 153 predicate places. [2023-09-01 03:40:54,625 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 2413 transitions, 50679 flow [2023-09-01 03:40:54,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.46666666666667) internal successors, (1807), 15 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:40:54,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:40:54,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:40:54,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 03:40:54,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:40:54,833 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:40:54,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:40:54,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1856691398, now seen corresponding path program 5 times [2023-09-01 03:40:54,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:40:54,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639284705] [2023-09-01 03:40:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:40:54,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:40:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:40:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:40:54,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:40:54,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639284705] [2023-09-01 03:40:54,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639284705] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:40:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646646928] [2023-09-01 03:40:54,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:40:54,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:40:54,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:40:54,974 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:40:54,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 03:40:55,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:40:55,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:40:55,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:40:55,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:40:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:40:55,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:40:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:40:55,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646646928] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:40:55,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:40:55,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2023-09-01 03:40:55,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741018122] [2023-09-01 03:40:55,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:40:55,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:40:55,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:40:55,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:40:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:40:55,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 278 [2023-09-01 03:40:55,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 2413 transitions, 50679 flow. Second operand has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:40:55,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:40:55,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 278 [2023-09-01 03:40:55,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:20,760 INFO L130 PetriNetUnfolder]: 162180/227131 cut-off events. [2023-09-01 03:42:20,760 INFO L131 PetriNetUnfolder]: For 8958016/8962551 co-relation queries the response was YES. [2023-09-01 03:42:23,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2193226 conditions, 227131 events. 162180/227131 cut-off events. For 8958016/8962551 co-relation queries the response was YES. Maximal size of possible extension queue 8225. Compared 1706733 event pairs, 17864 based on Foata normal form. 5857/232934 useless extension candidates. Maximal degree in co-relation 2193150. Up to 71568 conditions per place. [2023-09-01 03:42:24,707 INFO L137 encePairwiseOnDemand]: 270/278 looper letters, 4716 selfloop transitions, 1304 changer transitions 13/6049 dead transitions. [2023-09-01 03:42:24,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 6049 transitions, 139842 flow [2023-09-01 03:42:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 03:42:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 03:42:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1961 transitions. [2023-09-01 03:42:24,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702637889688249 [2023-09-01 03:42:24,709 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1961 transitions. [2023-09-01 03:42:24,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1961 transitions. [2023-09-01 03:42:24,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:24,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1961 transitions. [2023-09-01 03:42:24,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 130.73333333333332) internal successors, (1961), 15 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:24,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 278.0) internal successors, (4448), 16 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:24,715 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 278.0) internal successors, (4448), 16 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:24,715 INFO L175 Difference]: Start difference. First operand has 208 places, 2413 transitions, 50679 flow. Second operand 15 states and 1961 transitions. [2023-09-01 03:42:24,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 6049 transitions, 139842 flow [2023-09-01 03:48:35,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 6049 transitions, 122535 flow, removed 8419 selfloop flow, removed 1 redundant places. [2023-09-01 03:48:35,857 INFO L231 Difference]: Finished difference. Result has 232 places, 3118 transitions, 63947 flow [2023-09-01 03:48:35,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=44945, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=63947, PETRI_PLACES=232, PETRI_TRANSITIONS=3118} [2023-09-01 03:48:35,858 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2023-09-01 03:48:35,858 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 3118 transitions, 63947 flow [2023-09-01 03:48:35,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:35,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:35,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:35,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 03:48:36,063 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,SelfDestructingSolverStorable25 [2023-09-01 03:48:36,063 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-09-01 03:48:36,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1468718194, now seen corresponding path program 6 times [2023-09-01 03:48:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:48:36,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719109112] [2023-09-01 03:48:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:36,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:48:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:48:36,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:48:36,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719109112] [2023-09-01 03:48:36,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719109112] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:48:36,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619400835] [2023-09-01 03:48:36,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:48:36,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:48:36,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:48:36,225 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:48:36,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 03:48:36,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 03:48:36,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:36,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:48:36,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:48:36,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:48:36,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619400835] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:36,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:48:36,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-09-01 03:48:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016352211] [2023-09-01 03:48:36,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:36,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 03:48:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:48:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 03:48:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-09-01 03:48:36,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 278 [2023-09-01 03:48:36,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 3118 transitions, 63947 flow. Second operand has 17 states, 17 states have (on average 116.23529411764706) internal successors, (1976), 17 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:36,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:36,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 278 [2023-09-01 03:48:36,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15