./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:15:13,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:15:13,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:15:13,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:15:13,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:15:13,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:15:13,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:15:13,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:15:13,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:15:13,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:15:13,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:15:13,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:15:13,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:15:13,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:15:13,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:15:13,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:15:13,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:15:13,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:15:13,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:15:13,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:15:13,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:15:13,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:15:13,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:15:13,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:15:13,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:15:13,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:15:13,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:15:13,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:15:13,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:15:13,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:15:13,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:15:13,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:15:13,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:15:13,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:15:13,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:15:13,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:15:13,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:15:13,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:15:13,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:15:13,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:15:13,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:15:13,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:15:13,650 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:15:13,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:15:13,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:15:13,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:15:13,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:15:13,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:15:13,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:15:13,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:15:13,653 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:15:13,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:15:13,653 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:15:13,654 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:15:13,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:15:13,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:15:13,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:15:13,654 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:15:13,654 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:15:13,654 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:15:13,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:15:13,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:15:13,655 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:15:13,655 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:15:13,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:15:13,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:15:13,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:15:13,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:15:13,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:15:13,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:15:13,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:15:13,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:15:13,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:15:13,657 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:15:13,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:15:13,657 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:15:13,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:15:13,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:15:13,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:15:13,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:15:13,929 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:15:13,929 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:15:13,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-08-30 04:15:14,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:15:15,109 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:15:15,110 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-08-30 04:15:15,127 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14008495/5ddef01c5db14d198d951a96003c7d08/FLAG484b0ee96 [2023-08-30 04:15:15,137 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14008495/5ddef01c5db14d198d951a96003c7d08 [2023-08-30 04:15:15,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:15:15,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:15:15,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:15:15,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:15:15,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:15:15,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c8cf3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15, skipping insertion in model container [2023-08-30 04:15:15,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:15:15,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:15:15,451 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2023-08-30 04:15:15,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:15:15,496 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:15:15,527 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i[41323,41336] [2023-08-30 04:15:15,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:15:15,637 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:15:15,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15 WrapperNode [2023-08-30 04:15:15,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:15:15,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:15:15,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:15:15,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:15:15,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,694 INFO L138 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2023-08-30 04:15:15,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:15:15,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:15:15,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:15:15,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:15:15,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,736 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:15:15,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:15:15,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:15:15,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:15:15,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (1/1) ... [2023-08-30 04:15:15,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:15:15,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:15,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:15:15,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:15:15,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:15:15,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:15:15,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:15:15,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:15:15,799 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:15:15,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:15:15,799 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:15:15,799 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:15:15,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:15:15,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:15:15,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:15:15,801 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:15:15,945 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:15:15,947 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:15:16,256 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:15:16,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:15:16,264 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-30 04:15:16,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:15:16 BoogieIcfgContainer [2023-08-30 04:15:16,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:15:16,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:15:16,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:15:16,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:15:16,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:15:15" (1/3) ... [2023-08-30 04:15:16,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afba232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:15:16, skipping insertion in model container [2023-08-30 04:15:16,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:15:15" (2/3) ... [2023-08-30 04:15:16,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afba232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:15:16, skipping insertion in model container [2023-08-30 04:15:16,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:15:16" (3/3) ... [2023-08-30 04:15:16,274 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2023-08-30 04:15:16,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:15:16,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 04:15:16,290 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:15:16,381 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:15:16,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 281 transitions, 570 flow [2023-08-30 04:15:16,545 INFO L130 PetriNetUnfolder]: 73/440 cut-off events. [2023-08-30 04:15:16,545 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:15:16,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 440 events. 73/440 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2247 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-30 04:15:16,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 281 transitions, 570 flow [2023-08-30 04:15:16,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 281 transitions, 570 flow [2023-08-30 04:15:16,567 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:15:16,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 281 transitions, 570 flow [2023-08-30 04:15:16,585 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 281 transitions, 570 flow [2023-08-30 04:15:16,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 281 transitions, 570 flow [2023-08-30 04:15:16,631 INFO L130 PetriNetUnfolder]: 73/440 cut-off events. [2023-08-30 04:15:16,632 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:15:16,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 440 events. 73/440 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2247 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-30 04:15:16,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 26070 [2023-08-30 04:15:20,244 INFO L134 LiptonReduction]: Checked pairs total: 52948 [2023-08-30 04:15:20,244 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-08-30 04:15:20,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:15:20,268 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;@7e1ddb80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:15:20,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-08-30 04:15:20,272 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 04:15:20,272 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:15:20,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:20,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:15:20,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:20,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:20,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1088863, now seen corresponding path program 1 times [2023-08-30 04:15:20,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:20,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812332007] [2023-08-30 04:15:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:20,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:20,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812332007] [2023-08-30 04:15:20,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812332007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:20,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:20,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:20,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059911053] [2023-08-30 04:15:20,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:20,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:20,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 531 [2023-08-30 04:15:20,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 135 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:20,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:20,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 531 [2023-08-30 04:15:20,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:20,765 INFO L130 PetriNetUnfolder]: 1124/2457 cut-off events. [2023-08-30 04:15:20,766 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:15:20,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4578 conditions, 2457 events. 1124/2457 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17754 event pairs, 960 based on Foata normal form. 186/1719 useless extension candidates. Maximal degree in co-relation 4449. Up to 2113 conditions per place. [2023-08-30 04:15:20,776 INFO L137 encePairwiseOnDemand]: 486/531 looper letters, 75 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-30 04:15:20,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 350 flow [2023-08-30 04:15:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 822 transitions. [2023-08-30 04:15:20,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160075329566854 [2023-08-30 04:15:20,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 822 transitions. [2023-08-30 04:15:20,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 822 transitions. [2023-08-30 04:15:20,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:20,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 822 transitions. [2023-08-30 04:15:20,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:20,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:20,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:20,801 INFO L175 Difference]: Start difference. First operand has 99 places, 135 transitions, 278 flow. Second operand 3 states and 822 transitions. [2023-08-30 04:15:20,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 350 flow [2023-08-30 04:15:20,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 350 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:15:20,806 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 206 flow [2023-08-30 04:15:20,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-08-30 04:15:20,809 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2023-08-30 04:15:20,809 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 206 flow [2023-08-30 04:15:20,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:20,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:20,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:15:20,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:15:20,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:20,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:20,811 INFO L85 PathProgramCache]: Analyzing trace with hash 33765744, now seen corresponding path program 1 times [2023-08-30 04:15:20,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:20,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557789908] [2023-08-30 04:15:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:20,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557789908] [2023-08-30 04:15:20,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557789908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24226844] [2023-08-30 04:15:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:20,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:20,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:20,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:15:20,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:15:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:20,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:15:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:20,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:15:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:21,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24226844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:15:21,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:15:21,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:15:21,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704327531] [2023-08-30 04:15:21,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:15:21,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:15:21,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:21,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:15:21,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:15:21,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 531 [2023-08-30 04:15:21,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 234.28571428571428) internal successors, (1640), 7 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:21,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:21,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 531 [2023-08-30 04:15:21,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:21,305 INFO L130 PetriNetUnfolder]: 1124/2460 cut-off events. [2023-08-30 04:15:21,305 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:15:21,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4594 conditions, 2460 events. 1124/2460 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17785 event pairs, 960 based on Foata normal form. 0/1536 useless extension candidates. Maximal degree in co-relation 4582. Up to 2113 conditions per place. [2023-08-30 04:15:21,314 INFO L137 encePairwiseOnDemand]: 528/531 looper letters, 75 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-30 04:15:21,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 378 flow [2023-08-30 04:15:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:15:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:15:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1481 transitions. [2023-08-30 04:15:21,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46484620213433775 [2023-08-30 04:15:21,318 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1481 transitions. [2023-08-30 04:15:21,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1481 transitions. [2023-08-30 04:15:21,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:21,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1481 transitions. [2023-08-30 04:15:21,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 246.83333333333334) internal successors, (1481), 6 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:21,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:21,326 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:21,326 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 206 flow. Second operand 6 states and 1481 transitions. [2023-08-30 04:15:21,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 378 flow [2023-08-30 04:15:21,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 374 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:21,329 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 238 flow [2023-08-30 04:15:21,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-08-30 04:15:21,330 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2023-08-30 04:15:21,330 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 238 flow [2023-08-30 04:15:21,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 234.28571428571428) internal successors, (1640), 7 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:21,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:21,331 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:15:21,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 04:15:21,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:21,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:21,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:21,537 INFO L85 PathProgramCache]: Analyzing trace with hash 903907869, now seen corresponding path program 2 times [2023-08-30 04:15:21,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:21,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507736480] [2023-08-30 04:15:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:21,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:21,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:21,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507736480] [2023-08-30 04:15:21,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507736480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:21,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388953308] [2023-08-30 04:15:21,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:15:21,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:21,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:21,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:15:21,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:15:21,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:15:21,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:15:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:15:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:21,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:15:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:15:21,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:15:21,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388953308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:21,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:15:21,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-30 04:15:21,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024946721] [2023-08-30 04:15:21,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:21,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:21,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:21,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:15:21,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 531 [2023-08-30 04:15:21,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:21,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:21,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 531 [2023-08-30 04:15:21,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:22,101 INFO L130 PetriNetUnfolder]: 1074/2292 cut-off events. [2023-08-30 04:15:22,102 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:15:22,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4417 conditions, 2292 events. 1074/2292 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17034 event pairs, 0 based on Foata normal form. 0/1473 useless extension candidates. Maximal degree in co-relation 4383. Up to 2051 conditions per place. [2023-08-30 04:15:22,111 INFO L137 encePairwiseOnDemand]: 527/531 looper letters, 101 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-30 04:15:22,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 490 flow [2023-08-30 04:15:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2023-08-30 04:15:22,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021971123666039 [2023-08-30 04:15:22,114 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2023-08-30 04:15:22,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2023-08-30 04:15:22,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:22,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2023-08-30 04:15:22,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:22,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:22,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:22,120 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 238 flow. Second operand 3 states and 800 transitions. [2023-08-30 04:15:22,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 490 flow [2023-08-30 04:15:22,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 120 transitions, 476 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:22,124 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 234 flow [2023-08-30 04:15:22,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2023-08-30 04:15:22,124 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2023-08-30 04:15:22,125 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 234 flow [2023-08-30 04:15:22,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:22,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:22,125 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:15:22,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:15:22,330 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,SelfDestructingSolverStorable2 [2023-08-30 04:15:22,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:22,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash 903907871, now seen corresponding path program 1 times [2023-08-30 04:15:22,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:22,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74268271] [2023-08-30 04:15:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:22,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:15:22,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:22,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74268271] [2023-08-30 04:15:22,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74268271] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:22,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:22,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:22,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842462900] [2023-08-30 04:15:22,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:22,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:22,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:22,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:22,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:22,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 531 [2023-08-30 04:15:22,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:22,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:22,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 531 [2023-08-30 04:15:22,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:22,700 INFO L130 PetriNetUnfolder]: 1072/2266 cut-off events. [2023-08-30 04:15:22,700 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 04:15:22,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4366 conditions, 2266 events. 1072/2266 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16066 event pairs, 880 based on Foata normal form. 0/1480 useless extension candidates. Maximal degree in co-relation 4337. Up to 1897 conditions per place. [2023-08-30 04:15:22,715 INFO L137 encePairwiseOnDemand]: 526/531 looper letters, 96 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2023-08-30 04:15:22,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 116 transitions, 470 flow [2023-08-30 04:15:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 787 transitions. [2023-08-30 04:15:22,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49403640929064657 [2023-08-30 04:15:22,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 787 transitions. [2023-08-30 04:15:22,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 787 transitions. [2023-08-30 04:15:22,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:22,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 787 transitions. [2023-08-30 04:15:22,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:22,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:22,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:22,738 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 234 flow. Second operand 3 states and 787 transitions. [2023-08-30 04:15:22,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 116 transitions, 470 flow [2023-08-30 04:15:22,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 116 transitions, 466 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:15:22,744 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 232 flow [2023-08-30 04:15:22,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2023-08-30 04:15:22,746 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2023-08-30 04:15:22,746 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 232 flow [2023-08-30 04:15:22,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:22,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:22,747 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:22,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:15:22,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:22,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1124769419, now seen corresponding path program 1 times [2023-08-30 04:15:22,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:22,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219344011] [2023-08-30 04:15:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:15:22,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:22,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219344011] [2023-08-30 04:15:22,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219344011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:22,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129208108] [2023-08-30 04:15:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:22,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:22,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:22,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:15:22,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:15:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:15:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:15:22,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:15:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:15:22,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129208108] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:15:22,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:15:22,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 04:15:22,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286639913] [2023-08-30 04:15:22,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:15:22,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:15:22,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:22,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:15:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:15:23,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 531 [2023-08-30 04:15:23,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 232 flow. Second operand has 13 states, 13 states have (on average 234.3846153846154) internal successors, (3047), 13 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:23,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:23,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 531 [2023-08-30 04:15:23,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:23,325 INFO L130 PetriNetUnfolder]: 1074/2274 cut-off events. [2023-08-30 04:15:23,325 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-30 04:15:23,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4415 conditions, 2274 events. 1074/2274 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16036 event pairs, 920 based on Foata normal form. 6/1515 useless extension candidates. Maximal degree in co-relation 4362. Up to 1986 conditions per place. [2023-08-30 04:15:23,338 INFO L137 encePairwiseOnDemand]: 528/531 looper letters, 73 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-08-30 04:15:23,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 101 transitions, 436 flow [2023-08-30 04:15:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:15:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:15:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2886 transitions. [2023-08-30 04:15:23,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529190207156309 [2023-08-30 04:15:23,346 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2886 transitions. [2023-08-30 04:15:23,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2886 transitions. [2023-08-30 04:15:23,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:23,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2886 transitions. [2023-08-30 04:15:23,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 240.5) internal successors, (2886), 12 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:23,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 531.0) internal successors, (6903), 13 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:23,364 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 531.0) internal successors, (6903), 13 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:23,364 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 232 flow. Second operand 12 states and 2886 transitions. [2023-08-30 04:15:23,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 101 transitions, 436 flow [2023-08-30 04:15:23,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 101 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:15:23,368 INFO L231 Difference]: Finished difference. Result has 114 places, 101 transitions, 310 flow [2023-08-30 04:15:23,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=310, PETRI_PLACES=114, PETRI_TRANSITIONS=101} [2023-08-30 04:15:23,369 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 15 predicate places. [2023-08-30 04:15:23,369 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 101 transitions, 310 flow [2023-08-30 04:15:23,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 234.3846153846154) internal successors, (3047), 13 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:23,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:23,370 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:23,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:15:23,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:23,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:23,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1726668373, now seen corresponding path program 2 times [2023-08-30 04:15:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:23,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441553142] [2023-08-30 04:15:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:23,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:23,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:23,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441553142] [2023-08-30 04:15:23,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441553142] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:23,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518865262] [2023-08-30 04:15:23,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:15:23,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:23,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:23,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:15:23,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 04:15:23,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:15:23,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:15:23,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 04:15:23,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:23,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:15:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:23,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:15:23,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518865262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:23,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:15:23,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 04:15:23,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185189279] [2023-08-30 04:15:23,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:15:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:15:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:15:23,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 531 [2023-08-30 04:15:23,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 101 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 233.75) internal successors, (935), 4 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:23,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:23,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 531 [2023-08-30 04:15:23,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:24,167 INFO L130 PetriNetUnfolder]: 1052/2223 cut-off events. [2023-08-30 04:15:24,167 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 04:15:24,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4291 conditions, 2223 events. 1052/2223 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15568 event pairs, 588 based on Foata normal form. 0/1446 useless extension candidates. Maximal degree in co-relation 4214. Up to 1831 conditions per place. [2023-08-30 04:15:24,177 INFO L137 encePairwiseOnDemand]: 526/531 looper letters, 122 selfloop transitions, 4 changer transitions 0/143 dead transitions. [2023-08-30 04:15:24,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 143 transitions, 644 flow [2023-08-30 04:15:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:15:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:15:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1045 transitions. [2023-08-30 04:15:24,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919962335216573 [2023-08-30 04:15:24,179 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1045 transitions. [2023-08-30 04:15:24,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1045 transitions. [2023-08-30 04:15:24,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:24,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1045 transitions. [2023-08-30 04:15:24,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 261.25) internal successors, (1045), 4 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:24,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 531.0) internal successors, (2655), 5 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:24,184 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 531.0) internal successors, (2655), 5 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:24,184 INFO L175 Difference]: Start difference. First operand has 114 places, 101 transitions, 310 flow. Second operand 4 states and 1045 transitions. [2023-08-30 04:15:24,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 143 transitions, 644 flow [2023-08-30 04:15:24,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 596 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:15:24,187 INFO L231 Difference]: Finished difference. Result has 111 places, 100 transitions, 266 flow [2023-08-30 04:15:24,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=531, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=111, PETRI_TRANSITIONS=100} [2023-08-30 04:15:24,187 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 12 predicate places. [2023-08-30 04:15:24,188 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 100 transitions, 266 flow [2023-08-30 04:15:24,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 233.75) internal successors, (935), 4 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:24,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:24,188 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 04:15:24,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:15:24,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:24,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:15:24,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1987112861, now seen corresponding path program 1 times [2023-08-30 04:15:24,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:24,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229767035] [2023-08-30 04:15:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:24,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:15:24,423 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:15:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:15:24,459 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:15:24,461 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:15:24,462 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-08-30 04:15:24,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-08-30 04:15:24,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-08-30 04:15:24,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-08-30 04:15:24,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-08-30 04:15:24,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2023-08-30 04:15:24,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-08-30 04:15:24,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2023-08-30 04:15:24,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-08-30 04:15:24,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-08-30 04:15:24,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-08-30 04:15:24,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-08-30 04:15:24,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-08-30 04:15:24,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-08-30 04:15:24,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-08-30 04:15:24,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-08-30 04:15:24,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2023-08-30 04:15:24,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-08-30 04:15:24,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (31 of 50 remaining) [2023-08-30 04:15:24,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-08-30 04:15:24,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-08-30 04:15:24,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-08-30 04:15:24,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-08-30 04:15:24,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-08-30 04:15:24,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-08-30 04:15:24,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-08-30 04:15:24,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-08-30 04:15:24,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-08-30 04:15:24,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-08-30 04:15:24,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-08-30 04:15:24,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-08-30 04:15:24,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-08-30 04:15:24,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-08-30 04:15:24,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-08-30 04:15:24,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-08-30 04:15:24,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-08-30 04:15:24,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-08-30 04:15:24,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-08-30 04:15:24,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-08-30 04:15:24,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-08-30 04:15:24,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-08-30 04:15:24,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-08-30 04:15:24,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-08-30 04:15:24,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-08-30 04:15:24,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-08-30 04:15:24,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-08-30 04:15:24,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-08-30 04:15:24,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-08-30 04:15:24,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-08-30 04:15:24,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-08-30 04:15:24,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:15:24,472 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-30 04:15:24,474 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:15:24,474 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:15:24,514 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:15:24,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 362 transitions, 742 flow [2023-08-30 04:15:24,576 INFO L130 PetriNetUnfolder]: 118/709 cut-off events. [2023-08-30 04:15:24,577 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:15:24,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 709 events. 118/709 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4066 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 442. Up to 12 conditions per place. [2023-08-30 04:15:24,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 362 transitions, 742 flow [2023-08-30 04:15:24,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 307 places, 362 transitions, 742 flow [2023-08-30 04:15:24,591 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:15:24,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 307 places, 362 transitions, 742 flow [2023-08-30 04:15:24,592 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 307 places, 362 transitions, 742 flow [2023-08-30 04:15:24,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 362 transitions, 742 flow [2023-08-30 04:15:24,643 INFO L130 PetriNetUnfolder]: 118/709 cut-off events. [2023-08-30 04:15:24,643 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:15:24,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 709 events. 118/709 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4066 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 442. Up to 12 conditions per place. [2023-08-30 04:15:24,671 INFO L119 LiptonReduction]: Number of co-enabled transitions 66360 [2023-08-30 04:15:28,517 INFO L134 LiptonReduction]: Checked pairs total: 141629 [2023-08-30 04:15:28,518 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-08-30 04:15:28,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:15:28,519 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;@7e1ddb80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:15:28,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-08-30 04:15:28,521 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 04:15:28,521 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:15:28,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:28,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:15:28,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:28,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1851994, now seen corresponding path program 1 times [2023-08-30 04:15:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:28,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546355330] [2023-08-30 04:15:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546355330] [2023-08-30 04:15:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546355330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:28,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:28,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504049468] [2023-08-30 04:15:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:28,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:28,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:28,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 687 [2023-08-30 04:15:28,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 179 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:28,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:28,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 687 [2023-08-30 04:15:28,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:32,852 INFO L130 PetriNetUnfolder]: 51349/82027 cut-off events. [2023-08-30 04:15:32,852 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-08-30 04:15:32,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155863 conditions, 82027 events. 51349/82027 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 3067. Compared 713790 event pairs, 45936 based on Foata normal form. 6454/60593 useless extension candidates. Maximal degree in co-relation 63030. Up to 73697 conditions per place. [2023-08-30 04:15:33,376 INFO L137 encePairwiseOnDemand]: 630/687 looper letters, 100 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-08-30 04:15:33,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 126 transitions, 474 flow [2023-08-30 04:15:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:33,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2023-08-30 04:15:33,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128578360019408 [2023-08-30 04:15:33,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2023-08-30 04:15:33,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2023-08-30 04:15:33,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:33,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2023-08-30 04:15:33,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:33,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:33,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:33,386 INFO L175 Difference]: Start difference. First operand has 132 places, 179 transitions, 376 flow. Second operand 3 states and 1057 transitions. [2023-08-30 04:15:33,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 126 transitions, 474 flow [2023-08-30 04:15:33,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 126 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:15:33,389 INFO L231 Difference]: Finished difference. Result has 123 places, 126 transitions, 280 flow [2023-08-30 04:15:33,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=123, PETRI_TRANSITIONS=126} [2023-08-30 04:15:33,390 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -9 predicate places. [2023-08-30 04:15:33,390 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 126 transitions, 280 flow [2023-08-30 04:15:33,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:33,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:33,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:15:33,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:15:33,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:33,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash 57437195, now seen corresponding path program 1 times [2023-08-30 04:15:33,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:33,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396177369] [2023-08-30 04:15:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:33,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:33,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:33,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396177369] [2023-08-30 04:15:33,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396177369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:33,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300381450] [2023-08-30 04:15:33,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:33,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:33,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:15:33,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 04:15:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:33,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:15:33,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:33,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:15:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:33,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300381450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:15:33,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:15:33,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:15:33,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609838438] [2023-08-30 04:15:33,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:15:33,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:15:33,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:33,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:15:33,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:15:33,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 687 [2023-08-30 04:15:33,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 126 transitions, 280 flow. Second operand has 7 states, 7 states have (on average 300.2857142857143) internal successors, (2102), 7 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:33,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:33,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 687 [2023-08-30 04:15:33,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:38,232 INFO L130 PetriNetUnfolder]: 51349/82030 cut-off events. [2023-08-30 04:15:38,232 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2023-08-30 04:15:38,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155879 conditions, 82030 events. 51349/82030 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 3070. Compared 713720 event pairs, 45936 based on Foata normal form. 0/54142 useless extension candidates. Maximal degree in co-relation 155866. Up to 73697 conditions per place. [2023-08-30 04:15:38,591 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 100 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-08-30 04:15:38,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 502 flow [2023-08-30 04:15:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:15:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:15:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1902 transitions. [2023-08-30 04:15:38,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46142649199417757 [2023-08-30 04:15:38,595 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1902 transitions. [2023-08-30 04:15:38,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1902 transitions. [2023-08-30 04:15:38,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:38,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1902 transitions. [2023-08-30 04:15:38,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 687.0) internal successors, (4809), 7 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,603 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 687.0) internal successors, (4809), 7 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,603 INFO L175 Difference]: Start difference. First operand has 123 places, 126 transitions, 280 flow. Second operand 6 states and 1902 transitions. [2023-08-30 04:15:38,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 502 flow [2023-08-30 04:15:38,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 129 transitions, 498 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:38,606 INFO L231 Difference]: Finished difference. Result has 130 places, 129 transitions, 312 flow [2023-08-30 04:15:38,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=130, PETRI_TRANSITIONS=129} [2023-08-30 04:15:38,607 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -2 predicate places. [2023-08-30 04:15:38,607 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 129 transitions, 312 flow [2023-08-30 04:15:38,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 300.2857142857143) internal successors, (2102), 7 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:38,608 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:15:38,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 04:15:38,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:38,814 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:38,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:38,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1739695770, now seen corresponding path program 2 times [2023-08-30 04:15:38,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:38,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197780443] [2023-08-30 04:15:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:38,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:15:38,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:38,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197780443] [2023-08-30 04:15:38,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197780443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:38,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:38,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690274491] [2023-08-30 04:15:38,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:38,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:38,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 687 [2023-08-30 04:15:38,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 129 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:38,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:38,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 687 [2023-08-30 04:15:38,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:43,147 INFO L130 PetriNetUnfolder]: 49179/78361 cut-off events. [2023-08-30 04:15:43,147 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2023-08-30 04:15:43,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149189 conditions, 78361 events. 49179/78361 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 2956. Compared 678878 event pairs, 42100 based on Foata normal form. 0/52211 useless extension candidates. Maximal degree in co-relation 149154. Up to 67584 conditions per place. [2023-08-30 04:15:43,527 INFO L137 encePairwiseOnDemand]: 682/687 looper letters, 144 selfloop transitions, 3 changer transitions 0/171 dead transitions. [2023-08-30 04:15:43,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 690 flow [2023-08-30 04:15:43,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1033 transitions. [2023-08-30 04:15:43,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012130033964095 [2023-08-30 04:15:43,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1033 transitions. [2023-08-30 04:15:43,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1033 transitions. [2023-08-30 04:15:43,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:43,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1033 transitions. [2023-08-30 04:15:43,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:43,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:43,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:43,535 INFO L175 Difference]: Start difference. First operand has 130 places, 129 transitions, 312 flow. Second operand 3 states and 1033 transitions. [2023-08-30 04:15:43,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 690 flow [2023-08-30 04:15:43,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 171 transitions, 676 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:43,538 INFO L231 Difference]: Finished difference. Result has 129 places, 127 transitions, 300 flow [2023-08-30 04:15:43,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=129, PETRI_TRANSITIONS=127} [2023-08-30 04:15:43,538 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -3 predicate places. [2023-08-30 04:15:43,538 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 127 transitions, 300 flow [2023-08-30 04:15:43,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:43,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:43,539 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:15:43,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:15:43,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:43,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:43,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1739695772, now seen corresponding path program 1 times [2023-08-30 04:15:43,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:43,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71765868] [2023-08-30 04:15:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:43,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:43,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:43,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71765868] [2023-08-30 04:15:43,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71765868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:43,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098839415] [2023-08-30 04:15:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:43,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:43,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:43,598 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:15:43,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 04:15:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:43,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:15:43,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:43,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:15:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:15:43,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098839415] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:15:43,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:15:43,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 04:15:43,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594753395] [2023-08-30 04:15:43,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:15:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:15:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:15:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:15:43,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 687 [2023-08-30 04:15:43,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 127 transitions, 300 flow. Second operand has 13 states, 13 states have (on average 300.15384615384613) internal successors, (3902), 13 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:43,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:43,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 687 [2023-08-30 04:15:43,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:48,524 INFO L130 PetriNetUnfolder]: 49265/78683 cut-off events. [2023-08-30 04:15:48,524 INFO L131 PetriNetUnfolder]: For 714/714 co-relation queries the response was YES. [2023-08-30 04:15:48,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150580 conditions, 78683 events. 49265/78683 cut-off events. For 714/714 co-relation queries the response was YES. Maximal size of possible extension queue 2956. Compared 682299 event pairs, 44028 based on Foata normal form. 6/53088 useless extension candidates. Maximal degree in co-relation 150527. Up to 70663 conditions per place. [2023-08-30 04:15:48,907 INFO L137 encePairwiseOnDemand]: 684/687 looper letters, 98 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2023-08-30 04:15:48,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 554 flow [2023-08-30 04:15:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:15:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:15:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3703 transitions. [2023-08-30 04:15:48,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44917515769044153 [2023-08-30 04:15:48,914 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3703 transitions. [2023-08-30 04:15:48,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3703 transitions. [2023-08-30 04:15:48,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:48,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3703 transitions. [2023-08-30 04:15:48,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 308.5833333333333) internal successors, (3703), 12 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:48,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 687.0) internal successors, (8931), 13 states have internal predecessors, (8931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:48,928 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 687.0) internal successors, (8931), 13 states have internal predecessors, (8931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:48,928 INFO L175 Difference]: Start difference. First operand has 129 places, 127 transitions, 300 flow. Second operand 12 states and 3703 transitions. [2023-08-30 04:15:48,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 554 flow [2023-08-30 04:15:48,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 133 transitions, 548 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:15:48,938 INFO L231 Difference]: Finished difference. Result has 144 places, 133 transitions, 378 flow [2023-08-30 04:15:48,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=378, PETRI_PLACES=144, PETRI_TRANSITIONS=133} [2023-08-30 04:15:48,939 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, 12 predicate places. [2023-08-30 04:15:48,939 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 133 transitions, 378 flow [2023-08-30 04:15:48,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 300.15384615384613) internal successors, (3902), 13 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:48,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:48,940 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-30 04:15:48,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 04:15:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:49,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:49,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:49,145 INFO L85 PathProgramCache]: Analyzing trace with hash 242745596, now seen corresponding path program 2 times [2023-08-30 04:15:49,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:49,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256995788] [2023-08-30 04:15:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:49,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:49,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256995788] [2023-08-30 04:15:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256995788] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:49,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:49,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:15:49,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555489129] [2023-08-30 04:15:49,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:15:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:15:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:15:49,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 687 [2023-08-30 04:15:49,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 133 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:49,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:49,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 687 [2023-08-30 04:15:49,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:53,793 INFO L130 PetriNetUnfolder]: 48689/78160 cut-off events. [2023-08-30 04:15:53,793 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2023-08-30 04:15:54,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149017 conditions, 78160 events. 48689/78160 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 3050. Compared 690929 event pairs, 21280 based on Foata normal form. 0/52083 useless extension candidates. Maximal degree in co-relation 148940. Up to 70606 conditions per place. [2023-08-30 04:15:54,371 INFO L137 encePairwiseOnDemand]: 683/687 looper letters, 132 selfloop transitions, 2 changer transitions 0/158 dead transitions. [2023-08-30 04:15:54,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 158 transitions, 696 flow [2023-08-30 04:15:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:15:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:15:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1023 transitions. [2023-08-30 04:15:54,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4963609898107715 [2023-08-30 04:15:54,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1023 transitions. [2023-08-30 04:15:54,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1023 transitions. [2023-08-30 04:15:54,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:54,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1023 transitions. [2023-08-30 04:15:54,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:54,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:54,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 687.0) internal successors, (2748), 4 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:54,378 INFO L175 Difference]: Start difference. First operand has 144 places, 133 transitions, 378 flow. Second operand 3 states and 1023 transitions. [2023-08-30 04:15:54,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 158 transitions, 696 flow [2023-08-30 04:15:54,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 648 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:15:54,381 INFO L231 Difference]: Finished difference. Result has 142 places, 134 transitions, 344 flow [2023-08-30 04:15:54,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=142, PETRI_TRANSITIONS=134} [2023-08-30 04:15:54,382 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, 10 predicate places. [2023-08-30 04:15:54,382 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 134 transitions, 344 flow [2023-08-30 04:15:54,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:54,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:54,383 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:54,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:15:54,383 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:54,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash 587846671, now seen corresponding path program 1 times [2023-08-30 04:15:54,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:54,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278907558] [2023-08-30 04:15:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:54,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:54,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:54,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278907558] [2023-08-30 04:15:54,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278907558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:15:54,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701285500] [2023-08-30 04:15:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:54,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:54,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:15:54,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:15:54,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 04:15:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:15:54,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:15:54,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:15:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:54,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:15:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:54,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701285500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:15:54,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:15:54,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 04:15:54,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765521547] [2023-08-30 04:15:54,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:15:54,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:15:54,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:15:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:15:54,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 687 [2023-08-30 04:15:54,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 134 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 297.125) internal successors, (2377), 8 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:54,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:54,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 687 [2023-08-30 04:15:54,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:55,449 INFO L130 PetriNetUnfolder]: 2510/4690 cut-off events. [2023-08-30 04:15:55,449 INFO L131 PetriNetUnfolder]: For 1079/1079 co-relation queries the response was YES. [2023-08-30 04:15:55,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10314 conditions, 4690 events. 2510/4690 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 33691 event pairs, 0 based on Foata normal form. 506/4162 useless extension candidates. Maximal degree in co-relation 10260. Up to 2898 conditions per place. [2023-08-30 04:15:55,467 INFO L137 encePairwiseOnDemand]: 683/687 looper letters, 128 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2023-08-30 04:15:55,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 618 flow [2023-08-30 04:15:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:15:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:15:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1600 transitions. [2023-08-30 04:15:55,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657933042212518 [2023-08-30 04:15:55,471 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1600 transitions. [2023-08-30 04:15:55,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1600 transitions. [2023-08-30 04:15:55,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:55,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1600 transitions. [2023-08-30 04:15:55,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:55,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:55,477 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 687.0) internal successors, (4122), 6 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:55,477 INFO L175 Difference]: Start difference. First operand has 142 places, 134 transitions, 344 flow. Second operand 5 states and 1600 transitions. [2023-08-30 04:15:55,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 618 flow [2023-08-30 04:15:55,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 145 transitions, 614 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:15:55,480 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 220 flow [2023-08-30 04:15:55,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2023-08-30 04:15:55,481 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -40 predicate places. [2023-08-30 04:15:55,481 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 220 flow [2023-08-30 04:15:55,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 297.125) internal successors, (2377), 8 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:55,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:55,482 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:55,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:15:55,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:15:55,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:55,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1061488358, now seen corresponding path program 1 times [2023-08-30 04:15:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:55,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306641328] [2023-08-30 04:15:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:55,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:55,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:55,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306641328] [2023-08-30 04:15:55,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306641328] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:55,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:55,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 04:15:55,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872641778] [2023-08-30 04:15:55,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:55,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:15:55,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:55,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:15:55,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:15:56,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 687 [2023-08-30 04:15:56,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 272.2857142857143) internal successors, (1906), 7 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:56,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:56,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 687 [2023-08-30 04:15:56,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:56,879 INFO L130 PetriNetUnfolder]: 4838/8246 cut-off events. [2023-08-30 04:15:56,879 INFO L131 PetriNetUnfolder]: For 3032/3032 co-relation queries the response was YES. [2023-08-30 04:15:56,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17810 conditions, 8246 events. 4838/8246 cut-off events. For 3032/3032 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 57993 event pairs, 2350 based on Foata normal form. 132/6464 useless extension candidates. Maximal degree in co-relation 17756. Up to 4005 conditions per place. [2023-08-30 04:15:56,915 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 151 selfloop transitions, 6 changer transitions 0/171 dead transitions. [2023-08-30 04:15:56,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 171 transitions, 763 flow [2023-08-30 04:15:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:15:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:15:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2044 transitions. [2023-08-30 04:15:56,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42503639010189226 [2023-08-30 04:15:56,919 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2044 transitions. [2023-08-30 04:15:56,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2044 transitions. [2023-08-30 04:15:56,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:56,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2044 transitions. [2023-08-30 04:15:56,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:56,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 687.0) internal successors, (5496), 8 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:56,927 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 687.0) internal successors, (5496), 8 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:56,927 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 220 flow. Second operand 7 states and 2044 transitions. [2023-08-30 04:15:56,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 171 transitions, 763 flow [2023-08-30 04:15:56,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 171 transitions, 744 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 04:15:56,931 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 247 flow [2023-08-30 04:15:56,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=247, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2023-08-30 04:15:56,932 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -35 predicate places. [2023-08-30 04:15:56,932 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 247 flow [2023-08-30 04:15:56,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.2857142857143) internal successors, (1906), 7 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:56,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:56,932 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:56,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:15:56,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:56,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:56,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1453602499, now seen corresponding path program 1 times [2023-08-30 04:15:56,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:56,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826914539] [2023-08-30 04:15:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:56,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:57,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:57,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826914539] [2023-08-30 04:15:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826914539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:57,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:57,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:15:57,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121134278] [2023-08-30 04:15:57,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:57,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:15:57,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:57,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:15:57,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:15:57,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 687 [2023-08-30 04:15:57,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 275.6666666666667) internal successors, (1654), 6 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:57,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 687 [2023-08-30 04:15:57,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:57,766 INFO L130 PetriNetUnfolder]: 3920/6680 cut-off events. [2023-08-30 04:15:57,766 INFO L131 PetriNetUnfolder]: For 1380/1380 co-relation queries the response was YES. [2023-08-30 04:15:57,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14566 conditions, 6680 events. 3920/6680 cut-off events. For 1380/1380 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 46042 event pairs, 145 based on Foata normal form. 0/5675 useless extension candidates. Maximal degree in co-relation 14510. Up to 5808 conditions per place. [2023-08-30 04:15:57,792 INFO L137 encePairwiseOnDemand]: 680/687 looper letters, 84 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-30 04:15:57,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 99 transitions, 468 flow [2023-08-30 04:15:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:15:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:15:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1173 transitions. [2023-08-30 04:15:57,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268558951965066 [2023-08-30 04:15:57,795 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1173 transitions. [2023-08-30 04:15:57,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1173 transitions. [2023-08-30 04:15:57,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:57,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1173 transitions. [2023-08-30 04:15:57,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 687.0) internal successors, (3435), 5 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,799 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 687.0) internal successors, (3435), 5 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,799 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 247 flow. Second operand 4 states and 1173 transitions. [2023-08-30 04:15:57,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 99 transitions, 468 flow [2023-08-30 04:15:57,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 465 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:15:57,802 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 238 flow [2023-08-30 04:15:57,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2023-08-30 04:15:57,802 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -39 predicate places. [2023-08-30 04:15:57,803 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 238 flow [2023-08-30 04:15:57,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 275.6666666666667) internal successors, (1654), 6 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:57,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:57,803 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:57,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:15:57,803 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:57,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:57,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1453602062, now seen corresponding path program 1 times [2023-08-30 04:15:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:57,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013281896] [2023-08-30 04:15:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:57,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:15:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:15:57,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:15:57,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013281896] [2023-08-30 04:15:57,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013281896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:15:57,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:15:57,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:15:57,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379706149] [2023-08-30 04:15:57,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:15:57,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:15:57,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:15:57,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:15:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:15:58,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 687 [2023-08-30 04:15:58,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 238 flow. Second operand has 6 states, 6 states have (on average 281.6666666666667) internal successors, (1690), 6 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:58,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:15:58,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 687 [2023-08-30 04:15:58,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:15:59,229 INFO L130 PetriNetUnfolder]: 8039/13737 cut-off events. [2023-08-30 04:15:59,230 INFO L131 PetriNetUnfolder]: For 3394/3394 co-relation queries the response was YES. [2023-08-30 04:15:59,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30457 conditions, 13737 events. 8039/13737 cut-off events. For 3394/3394 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 103591 event pairs, 1314 based on Foata normal form. 0/11467 useless extension candidates. Maximal degree in co-relation 30401. Up to 6304 conditions per place. [2023-08-30 04:15:59,297 INFO L137 encePairwiseOnDemand]: 678/687 looper letters, 144 selfloop transitions, 17 changer transitions 0/174 dead transitions. [2023-08-30 04:15:59,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 174 transitions, 837 flow [2023-08-30 04:15:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:15:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:15:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1818 transitions. [2023-08-30 04:15:59,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410480349344978 [2023-08-30 04:15:59,300 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1818 transitions. [2023-08-30 04:15:59,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1818 transitions. [2023-08-30 04:15:59,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:15:59,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1818 transitions. [2023-08-30 04:15:59,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 303.0) internal successors, (1818), 6 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:59,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 687.0) internal successors, (4809), 7 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:59,317 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 687.0) internal successors, (4809), 7 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:59,317 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 238 flow. Second operand 6 states and 1818 transitions. [2023-08-30 04:15:59,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 174 transitions, 837 flow [2023-08-30 04:15:59,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 174 transitions, 833 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:15:59,324 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 357 flow [2023-08-30 04:15:59,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=687, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2023-08-30 04:15:59,324 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -33 predicate places. [2023-08-30 04:15:59,324 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 357 flow [2023-08-30 04:15:59,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 281.6666666666667) internal successors, (1690), 6 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:15:59,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:15:59,325 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:15:59,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:15:59,325 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:15:59,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:15:59,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1958417434, now seen corresponding path program 1 times [2023-08-30 04:15:59,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:15:59,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273652331] [2023-08-30 04:15:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:15:59,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:15:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:15:59,347 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:15:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:15:59,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:15:59,358 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:15:59,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (60 of 61 remaining) [2023-08-30 04:15:59,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 61 remaining) [2023-08-30 04:15:59,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 61 remaining) [2023-08-30 04:15:59,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 61 remaining) [2023-08-30 04:15:59,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 61 remaining) [2023-08-30 04:15:59,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (55 of 61 remaining) [2023-08-30 04:15:59,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 61 remaining) [2023-08-30 04:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 61 remaining) [2023-08-30 04:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 61 remaining) [2023-08-30 04:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 61 remaining) [2023-08-30 04:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 61 remaining) [2023-08-30 04:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 61 remaining) [2023-08-30 04:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 61 remaining) [2023-08-30 04:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 61 remaining) [2023-08-30 04:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 61 remaining) [2023-08-30 04:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 61 remaining) [2023-08-30 04:15:59,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 61 remaining) [2023-08-30 04:15:59,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 61 remaining) [2023-08-30 04:15:59,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (42 of 61 remaining) [2023-08-30 04:15:59,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 61 remaining) [2023-08-30 04:15:59,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 61 remaining) [2023-08-30 04:15:59,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 61 remaining) [2023-08-30 04:15:59,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 61 remaining) [2023-08-30 04:15:59,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 61 remaining) [2023-08-30 04:15:59,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 61 remaining) [2023-08-30 04:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 61 remaining) [2023-08-30 04:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 61 remaining) [2023-08-30 04:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 61 remaining) [2023-08-30 04:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 61 remaining) [2023-08-30 04:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 61 remaining) [2023-08-30 04:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 61 remaining) [2023-08-30 04:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 61 remaining) [2023-08-30 04:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 61 remaining) [2023-08-30 04:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 61 remaining) [2023-08-30 04:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 61 remaining) [2023-08-30 04:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 61 remaining) [2023-08-30 04:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 61 remaining) [2023-08-30 04:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 61 remaining) [2023-08-30 04:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 61 remaining) [2023-08-30 04:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 61 remaining) [2023-08-30 04:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 61 remaining) [2023-08-30 04:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 61 remaining) [2023-08-30 04:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 61 remaining) [2023-08-30 04:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 61 remaining) [2023-08-30 04:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 61 remaining) [2023-08-30 04:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 61 remaining) [2023-08-30 04:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 61 remaining) [2023-08-30 04:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 61 remaining) [2023-08-30 04:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 61 remaining) [2023-08-30 04:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 61 remaining) [2023-08-30 04:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 61 remaining) [2023-08-30 04:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 61 remaining) [2023-08-30 04:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 61 remaining) [2023-08-30 04:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 61 remaining) [2023-08-30 04:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 61 remaining) [2023-08-30 04:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 61 remaining) [2023-08-30 04:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 61 remaining) [2023-08-30 04:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 61 remaining) [2023-08-30 04:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 61 remaining) [2023-08-30 04:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 61 remaining) [2023-08-30 04:15:59,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 61 remaining) [2023-08-30 04:15:59,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:15:59,366 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:15:59,366 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:15:59,366 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:15:59,396 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:15:59,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 443 transitions, 916 flow [2023-08-30 04:15:59,488 INFO L130 PetriNetUnfolder]: 168/1019 cut-off events. [2023-08-30 04:15:59,488 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:15:59,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 1019 events. 168/1019 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6191 event pairs, 1 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 717. Up to 16 conditions per place. [2023-08-30 04:15:59,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 375 places, 443 transitions, 916 flow [2023-08-30 04:15:59,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 443 transitions, 916 flow [2023-08-30 04:15:59,507 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:15:59,508 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 375 places, 443 transitions, 916 flow [2023-08-30 04:15:59,508 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 375 places, 443 transitions, 916 flow [2023-08-30 04:15:59,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 443 transitions, 916 flow [2023-08-30 04:15:59,589 INFO L130 PetriNetUnfolder]: 168/1019 cut-off events. [2023-08-30 04:15:59,590 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:15:59,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 1019 events. 168/1019 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6191 event pairs, 1 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 717. Up to 16 conditions per place. [2023-08-30 04:15:59,634 INFO L119 LiptonReduction]: Number of co-enabled transitions 118974 [2023-08-30 04:16:04,008 INFO L134 LiptonReduction]: Checked pairs total: 258432 [2023-08-30 04:16:04,009 INFO L136 LiptonReduction]: Total number of compositions: 390 [2023-08-30 04:16:04,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:16:04,010 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;@7e1ddb80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:16:04,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-08-30 04:16:04,011 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-30 04:16:04,011 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:16:04,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:16:04,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:16:04,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-30 04:16:04,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:16:04,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2759106, now seen corresponding path program 1 times [2023-08-30 04:16:04,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:16:04,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284986015] [2023-08-30 04:16:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:16:04,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:16:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:16:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:16:04,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:16:04,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284986015] [2023-08-30 04:16:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284986015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:16:04,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:16:04,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:16:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396713571] [2023-08-30 04:16:04,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:16:04,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:16:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:16:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:16:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:16:04,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 833 [2023-08-30 04:16:04,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 222 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:16:04,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:16:04,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 833 [2023-08-30 04:16:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand