./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:42:58,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:42:58,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:42:58,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:42:58,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:42:58,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:42:58,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:42:58,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:42:58,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:42:58,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:42:58,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:42:58,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:42:58,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:42:58,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:42:58,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:42:58,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:42:58,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:42:58,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:42:58,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:42:58,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:42:58,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:42:58,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:42:58,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:42:58,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:42:58,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:42:58,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:42:58,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:42:58,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:42:58,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:42:58,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:42:58,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:42:58,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:42:58,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:42:58,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:42:58,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:42:58,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:42:58,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:42:58,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:42:58,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:42:58,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:42:58,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:42:58,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:42:58,732 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:42:58,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:42:58,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:42:58,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:42:58,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:42:58,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:42:58,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:42:58,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:42:58,735 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:42:58,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:42:58,736 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:42:58,736 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:42:58,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:42:58,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:42:58,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:42:58,736 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:42:58,736 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:42:58,737 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:42:58,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:42:58,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:42:58,737 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:42:58,737 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:42:58,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:42:58,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:42:58,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:42:58,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:42:58,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:42:58,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:42:58,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:42:58,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:42:58,738 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:42:58,739 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:42:58,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:42:58,739 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:42:58,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:42:58,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:42:58,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:42:59,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:42:59,001 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:42:59,002 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:42:59,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-08-31 22:42:59,925 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:43:00,097 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:43:00,098 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-08-31 22:43:00,105 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2c9bcc1/6f8f7b9c8ff64ef8bb050916608c81d8/FLAG136494c38 [2023-08-31 22:43:00,115 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2c9bcc1/6f8f7b9c8ff64ef8bb050916608c81d8 [2023-08-31 22:43:00,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:43:00,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:43:00,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:43:00,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:43:00,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:43:00,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ac8a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00, skipping insertion in model container [2023-08-31 22:43:00,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:43:00,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:43:00,414 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i[31167,31180] [2023-08-31 22:43:00,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:43:00,429 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:43:00,465 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i[31167,31180] [2023-08-31 22:43:00,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:43:00,502 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:43:00,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00 WrapperNode [2023-08-31 22:43:00,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:43:00,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:43:00,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:43:00,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:43:00,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,563 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 190 [2023-08-31 22:43:00,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:43:00,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:43:00,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:43:00,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:43:00,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,602 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:43:00,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:43:00,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:43:00,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:43:00,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (1/1) ... [2023-08-31 22:43:00,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:43:00,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:43:00,650 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) [2023-08-31 22:43:00,672 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 [2023-08-31 22:43:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:43:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 22:43:00,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 22:43:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:43:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:43:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:43:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:43:00,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:43:00,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:43:00,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:43:00,683 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:43:00,827 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:43:00,838 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:43:01,176 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:43:01,343 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:43:01,343 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 22:43:01,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:43:01 BoogieIcfgContainer [2023-08-31 22:43:01,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:43:01,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:43:01,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:43:01,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:43:01,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:43:00" (1/3) ... [2023-08-31 22:43:01,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cbd036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:43:01, skipping insertion in model container [2023-08-31 22:43:01,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:43:00" (2/3) ... [2023-08-31 22:43:01,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42cbd036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:43:01, skipping insertion in model container [2023-08-31 22:43:01,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:43:01" (3/3) ... [2023-08-31 22:43:01,351 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-1.i [2023-08-31 22:43:01,361 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:43:01,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-31 22:43:01,361 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:43:01,433 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:01,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:43:01,543 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-31 22:43:01,543 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:43:01,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-31 22:43:01,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:43:01,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 325 flow [2023-08-31 22:43:01,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:01,571 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-31 22:43:01,572 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-31 22:43:01,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:43:01,600 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-31 22:43:01,600 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:43:01,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-31 22:43:01,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 4248 [2023-08-31 22:43:05,829 INFO L134 LiptonReduction]: Checked pairs total: 8906 [2023-08-31 22:43:05,829 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-31 22:43:05,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:05,850 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:05,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:05,862 INFO L130 PetriNetUnfolder]: 2/32 cut-off events. [2023-08-31 22:43:05,863 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:43:05,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:05,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 22:43:05,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:05,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1466791183, now seen corresponding path program 1 times [2023-08-31 22:43:05,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:05,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412619210] [2023-08-31 22:43:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:05,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:05,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:05,985 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:05,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:05,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:43:05,987 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:05,988 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:05,989 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:05,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 22:43:06,057 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:06,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:43:06,121 INFO L130 PetriNetUnfolder]: 21/311 cut-off events. [2023-08-31 22:43:06,122 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:43:06,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 311 events. 21/311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 937 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-08-31 22:43:06,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:43:06,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 279 transitions, 570 flow [2023-08-31 22:43:06,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:06,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 279 transitions, 570 flow [2023-08-31 22:43:06,130 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 279 transitions, 570 flow [2023-08-31 22:43:06,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:43:06,207 INFO L130 PetriNetUnfolder]: 21/311 cut-off events. [2023-08-31 22:43:06,207 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:43:06,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 311 events. 21/311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 937 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-08-31 22:43:06,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 36580 [2023-08-31 22:43:11,450 INFO L134 LiptonReduction]: Checked pairs total: 126176 [2023-08-31 22:43:11,451 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-31 22:43:11,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:11,453 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:11,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:11,460 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2023-08-31 22:43:11,460 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:43:11,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:11,461 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 22:43:11,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:11,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1209779092, now seen corresponding path program 1 times [2023-08-31 22:43:11,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:11,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852729819] [2023-08-31 22:43:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:11,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:11,528 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:11,532 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:11,532 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:11,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:43:11,533 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:11,533 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:11,534 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:11,534 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 22:43:11,613 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:11,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:43:11,671 INFO L130 PetriNetUnfolder]: 31/447 cut-off events. [2023-08-31 22:43:11,671 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:43:11,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 447 events. 31/447 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1685 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 371. Up to 8 conditions per place. [2023-08-31 22:43:11,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:43:11,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 377 places, 398 transitions, 817 flow [2023-08-31 22:43:11,680 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:11,680 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 377 places, 398 transitions, 817 flow [2023-08-31 22:43:11,681 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 377 places, 398 transitions, 817 flow [2023-08-31 22:43:11,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:43:11,747 INFO L130 PetriNetUnfolder]: 31/447 cut-off events. [2023-08-31 22:43:11,748 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:43:11,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 447 events. 31/447 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1685 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 371. Up to 8 conditions per place. [2023-08-31 22:43:11,766 INFO L119 LiptonReduction]: Number of co-enabled transitions 96996 [2023-08-31 22:43:19,075 INFO L134 LiptonReduction]: Checked pairs total: 339414 [2023-08-31 22:43:19,075 INFO L136 LiptonReduction]: Total number of compositions: 330 [2023-08-31 22:43:19,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:19,082 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:19,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:19,091 INFO L130 PetriNetUnfolder]: 7/126 cut-off events. [2023-08-31 22:43:19,093 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:43:19,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:19,094 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 22:43:19,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:19,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:19,094 INFO L85 PathProgramCache]: Analyzing trace with hash 899092402, now seen corresponding path program 1 times [2023-08-31 22:43:19,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:19,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505849156] [2023-08-31 22:43:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:19,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:19,123 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:19,186 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:19,190 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:19,190 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:19,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:43:19,190 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:19,194 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:19,195 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:19,195 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 22:43:19,326 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:19,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:43:19,408 INFO L130 PetriNetUnfolder]: 41/583 cut-off events. [2023-08-31 22:43:19,409 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:43:19,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 583 events. 41/583 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2534 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 489. Up to 10 conditions per place. [2023-08-31 22:43:19,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:43:19,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 517 transitions, 1066 flow [2023-08-31 22:43:19,473 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:19,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 489 places, 517 transitions, 1066 flow [2023-08-31 22:43:19,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 489 places, 517 transitions, 1066 flow [2023-08-31 22:43:19,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:43:19,554 INFO L130 PetriNetUnfolder]: 41/583 cut-off events. [2023-08-31 22:43:19,555 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:43:19,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 583 events. 41/583 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2534 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 489. Up to 10 conditions per place. [2023-08-31 22:43:19,594 INFO L119 LiptonReduction]: Number of co-enabled transitions 185496 [2023-08-31 22:43:27,532 INFO L134 LiptonReduction]: Checked pairs total: 596813 [2023-08-31 22:43:27,533 INFO L136 LiptonReduction]: Total number of compositions: 419 [2023-08-31 22:43:27,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:27,544 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:27,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:27,574 INFO L130 PetriNetUnfolder]: 14/205 cut-off events. [2023-08-31 22:43:27,577 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:43:27,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:27,578 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 22:43:27,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:27,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:27,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1264261348, now seen corresponding path program 1 times [2023-08-31 22:43:27,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:27,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424023045] [2023-08-31 22:43:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:27,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:27,627 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:27,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:27,652 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:27,652 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:27,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:43:27,652 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:27,653 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:27,653 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:27,653 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 22:43:27,739 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:27,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:43:27,903 INFO L130 PetriNetUnfolder]: 51/719 cut-off events. [2023-08-31 22:43:27,903 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:43:27,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 719 events. 51/719 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3422 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 607. Up to 12 conditions per place. [2023-08-31 22:43:27,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:43:27,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 601 places, 636 transitions, 1317 flow [2023-08-31 22:43:27,926 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:27,926 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 601 places, 636 transitions, 1317 flow [2023-08-31 22:43:27,926 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 601 places, 636 transitions, 1317 flow [2023-08-31 22:43:27,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:43:28,043 INFO L130 PetriNetUnfolder]: 51/719 cut-off events. [2023-08-31 22:43:28,043 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:43:28,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 719 events. 51/719 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3422 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 607. Up to 12 conditions per place. [2023-08-31 22:43:28,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 302080 [2023-08-31 22:43:37,919 INFO L134 LiptonReduction]: Checked pairs total: 936587 [2023-08-31 22:43:37,919 INFO L136 LiptonReduction]: Total number of compositions: 515 [2023-08-31 22:43:37,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:37,921 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:37,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:37,945 INFO L130 PetriNetUnfolder]: 22/282 cut-off events. [2023-08-31 22:43:37,945 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:43:37,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:37,945 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:43:37,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:37,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1418106041, now seen corresponding path program 1 times [2023-08-31 22:43:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:37,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525106303] [2023-08-31 22:43:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:37,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:37,966 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:37,981 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:37,981 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:37,981 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:37,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:43:37,982 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:37,982 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:37,982 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:37,982 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 22:43:38,070 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:38,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:43:38,273 INFO L130 PetriNetUnfolder]: 61/855 cut-off events. [2023-08-31 22:43:38,273 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:43:38,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 855 events. 61/855 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4325 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 738. Up to 14 conditions per place. [2023-08-31 22:43:38,299 INFO L82 GeneralOperation]: Start removeDead. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:43:38,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 713 places, 755 transitions, 1570 flow [2023-08-31 22:43:38,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:38,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 713 places, 755 transitions, 1570 flow [2023-08-31 22:43:38,307 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 713 places, 755 transitions, 1570 flow [2023-08-31 22:43:38,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:43:38,493 INFO L130 PetriNetUnfolder]: 61/855 cut-off events. [2023-08-31 22:43:38,494 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:43:38,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 855 events. 61/855 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4325 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 738. Up to 14 conditions per place. [2023-08-31 22:43:38,560 INFO L119 LiptonReduction]: Number of co-enabled transitions 446748 [2023-08-31 22:43:51,284 INFO L134 LiptonReduction]: Checked pairs total: 1452909 [2023-08-31 22:43:51,285 INFO L136 LiptonReduction]: Total number of compositions: 616 [2023-08-31 22:43:51,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:51,286 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:51,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:51,322 INFO L130 PetriNetUnfolder]: 28/358 cut-off events. [2023-08-31 22:43:51,322 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:43:51,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:51,323 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:43:51,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:51,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash -306706194, now seen corresponding path program 1 times [2023-08-31 22:43:51,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:51,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406390734] [2023-08-31 22:43:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:51,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:51,384 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:51,385 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:51,385 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:51,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:43:51,385 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:51,387 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:51,387 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:51,387 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 22:43:51,487 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:51,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:43:51,751 INFO L130 PetriNetUnfolder]: 71/991 cut-off events. [2023-08-31 22:43:51,752 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:43:51,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 991 events. 71/991 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5271 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 881. Up to 16 conditions per place. [2023-08-31 22:43:51,782 INFO L82 GeneralOperation]: Start removeDead. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:43:51,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 825 places, 874 transitions, 1825 flow [2023-08-31 22:43:51,789 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:51,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 825 places, 874 transitions, 1825 flow [2023-08-31 22:43:51,790 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 825 places, 874 transitions, 1825 flow [2023-08-31 22:43:51,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:43:52,054 INFO L130 PetriNetUnfolder]: 71/991 cut-off events. [2023-08-31 22:43:52,054 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:43:52,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 991 events. 71/991 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5271 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 881. Up to 16 conditions per place. [2023-08-31 22:43:52,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 619500 [2023-08-31 22:44:04,277 INFO L134 LiptonReduction]: Checked pairs total: 2263952 [2023-08-31 22:44:04,277 INFO L136 LiptonReduction]: Total number of compositions: 694 [2023-08-31 22:44:04,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:04,279 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:04,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:04,328 INFO L130 PetriNetUnfolder]: 35/435 cut-off events. [2023-08-31 22:44:04,328 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:44:04,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:04,328 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:44:04,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:04,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:04,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1672351494, now seen corresponding path program 1 times [2023-08-31 22:44:04,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:04,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301255020] [2023-08-31 22:44:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:04,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:04,345 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:04,360 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:04,360 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:04,361 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:04,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:44:04,361 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:04,361 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:04,361 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:04,361 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 22:44:04,466 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:44:04,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:44:04,808 INFO L130 PetriNetUnfolder]: 81/1127 cut-off events. [2023-08-31 22:44:04,809 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:44:04,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1127 events. 81/1127 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6169 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1025. Up to 18 conditions per place. [2023-08-31 22:44:04,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:44:04,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 937 places, 993 transitions, 2082 flow [2023-08-31 22:44:04,852 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:44:04,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 937 places, 993 transitions, 2082 flow [2023-08-31 22:44:04,853 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 937 places, 993 transitions, 2082 flow [2023-08-31 22:44:04,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:44:05,219 INFO L130 PetriNetUnfolder]: 81/1127 cut-off events. [2023-08-31 22:44:05,220 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:44:05,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1127 events. 81/1127 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6169 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1025. Up to 18 conditions per place. [2023-08-31 22:44:05,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 820336 [2023-08-31 22:44:19,184 INFO L134 LiptonReduction]: Checked pairs total: 2694040 [2023-08-31 22:44:19,184 INFO L136 LiptonReduction]: Total number of compositions: 796 [2023-08-31 22:44:19,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:19,186 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:19,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:19,255 INFO L130 PetriNetUnfolder]: 43/514 cut-off events. [2023-08-31 22:44:19,255 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:44:19,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:19,255 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:44:19,256 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:19,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash 24339606, now seen corresponding path program 1 times [2023-08-31 22:44:19,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:19,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577757984] [2023-08-31 22:44:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:19,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:19,274 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:19,290 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:19,290 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:19,290 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:19,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:44:19,290 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:19,291 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:19,291 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:19,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 22:44:19,405 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:44:19,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:44:19,850 INFO L130 PetriNetUnfolder]: 91/1263 cut-off events. [2023-08-31 22:44:19,851 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:44:19,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1263 events. 91/1263 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7146 event pairs, 0 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1170. Up to 20 conditions per place. [2023-08-31 22:44:19,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:44:19,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:44:19,898 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:44:19,898 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:44:19,898 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:44:19,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:44:20,273 INFO L130 PetriNetUnfolder]: 91/1263 cut-off events. [2023-08-31 22:44:20,273 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:44:20,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1263 events. 91/1263 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7146 event pairs, 0 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1170. Up to 20 conditions per place. [2023-08-31 22:44:20,508 INFO L119 LiptonReduction]: Number of co-enabled transitions 1049256 [2023-08-31 22:44:38,866 INFO L134 LiptonReduction]: Checked pairs total: 3805572 [2023-08-31 22:44:38,866 INFO L136 LiptonReduction]: Total number of compositions: 892 [2023-08-31 22:44:38,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:38,868 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:38,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:38,957 INFO L130 PetriNetUnfolder]: 50/591 cut-off events. [2023-08-31 22:44:38,957 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:44:38,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:38,957 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:44:38,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:38,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1294917962, now seen corresponding path program 1 times [2023-08-31 22:44:38,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:38,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133358361] [2023-08-31 22:44:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:38,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:38,991 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:39,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:39,008 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:39,008 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:39,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:44:39,008 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:39,009 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:39,009 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:39,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 22:44:39,152 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:44:39,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:44:39,648 INFO L130 PetriNetUnfolder]: 101/1399 cut-off events. [2023-08-31 22:44:39,648 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:44:39,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1399 events. 101/1399 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8067 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 1316. Up to 22 conditions per place. [2023-08-31 22:44:39,718 INFO L82 GeneralOperation]: Start removeDead. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:44:39,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:44:39,732 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:44:39,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:44:39,732 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:44:39,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:44:40,283 INFO L130 PetriNetUnfolder]: 101/1399 cut-off events. [2023-08-31 22:44:40,283 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:44:40,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1399 events. 101/1399 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8067 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 1316. Up to 22 conditions per place. [2023-08-31 22:44:40,537 INFO L119 LiptonReduction]: Number of co-enabled transitions 1306260 [2023-08-31 22:44:59,826 INFO L134 LiptonReduction]: Checked pairs total: 4772839 [2023-08-31 22:44:59,827 INFO L136 LiptonReduction]: Total number of compositions: 990 [2023-08-31 22:44:59,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:59,829 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:59,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:59,949 INFO L130 PetriNetUnfolder]: 57/669 cut-off events. [2023-08-31 22:44:59,950 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:44:59,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:59,950 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:44:59,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:59,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:59,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1525356355, now seen corresponding path program 1 times [2023-08-31 22:44:59,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:59,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530443976] [2023-08-31 22:44:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:59,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:59,970 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:59,988 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:59,988 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:59,988 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:59,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:44:59,989 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:59,989 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:59,989 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:59,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 22:45:00,132 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:00,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:45:00,732 INFO L130 PetriNetUnfolder]: 111/1535 cut-off events. [2023-08-31 22:45:00,732 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:45:00,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1535 events. 111/1535 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8995 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 1464. Up to 24 conditions per place. [2023-08-31 22:45:00,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:45:00,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:45:00,820 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:00,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:45:00,821 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:45:00,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:45:01,362 INFO L130 PetriNetUnfolder]: 111/1535 cut-off events. [2023-08-31 22:45:01,362 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:45:01,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1535 events. 111/1535 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8995 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 1464. Up to 24 conditions per place. [2023-08-31 22:45:01,794 INFO L119 LiptonReduction]: Number of co-enabled transitions 1591348 [2023-08-31 22:45:23,789 INFO L134 LiptonReduction]: Checked pairs total: 5931490 [2023-08-31 22:45:23,789 INFO L136 LiptonReduction]: Total number of compositions: 1098 [2023-08-31 22:45:23,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:23,791 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:23,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:23,924 INFO L130 PetriNetUnfolder]: 64/744 cut-off events. [2023-08-31 22:45:23,924 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:45:23,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:23,924 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:23,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:23,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash -864123118, now seen corresponding path program 1 times [2023-08-31 22:45:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:23,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058746792] [2023-08-31 22:45:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:23,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:23,946 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:23,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:23,964 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:23,965 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:23,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:45:23,965 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:23,965 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:23,965 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:23,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 22:45:24,115 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:24,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:45:24,814 INFO L130 PetriNetUnfolder]: 121/1671 cut-off events. [2023-08-31 22:45:24,814 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:45:24,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 1671 events. 121/1671 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9926 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1614. Up to 26 conditions per place. [2023-08-31 22:45:24,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:45:24,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:45:24,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:24,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:45:24,928 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:45:24,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:45:25,634 INFO L130 PetriNetUnfolder]: 121/1671 cut-off events. [2023-08-31 22:45:25,634 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:45:25,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 1671 events. 121/1671 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9926 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1614. Up to 26 conditions per place. [2023-08-31 22:45:25,963 INFO L119 LiptonReduction]: Number of co-enabled transitions 1904520 [2023-08-31 22:45:49,741 INFO L134 LiptonReduction]: Checked pairs total: 6195274 [2023-08-31 22:45:49,741 INFO L136 LiptonReduction]: Total number of compositions: 1171 [2023-08-31 22:45:49,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:49,744 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:49,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:49,905 INFO L130 PetriNetUnfolder]: 70/821 cut-off events. [2023-08-31 22:45:49,906 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:45:49,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:49,906 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:49,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:49,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:49,907 INFO L85 PathProgramCache]: Analyzing trace with hash 715230075, now seen corresponding path program 1 times [2023-08-31 22:45:49,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:49,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186830895] [2023-08-31 22:45:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:49,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:49,961 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:49,961 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:49,961 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:49,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:45:49,962 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:49,964 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:49,964 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:49,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 22:45:50,172 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:50,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:45:50,974 INFO L130 PetriNetUnfolder]: 131/1807 cut-off events. [2023-08-31 22:45:50,974 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:45:51,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 1807 events. 131/1807 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10880 event pairs, 0 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 1765. Up to 28 conditions per place. [2023-08-31 22:45:51,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:45:51,124 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:45:51,124 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:51,124 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:45:51,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:45:51,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:45:51,926 INFO L130 PetriNetUnfolder]: 131/1807 cut-off events. [2023-08-31 22:45:51,927 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:45:52,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 1807 events. 131/1807 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10880 event pairs, 0 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 1765. Up to 28 conditions per place. [2023-08-31 22:45:52,354 INFO L119 LiptonReduction]: Number of co-enabled transitions 2245776 [2023-08-31 22:46:16,275 INFO L134 LiptonReduction]: Checked pairs total: 8237028 [2023-08-31 22:46:16,275 INFO L136 LiptonReduction]: Total number of compositions: 1257 [2023-08-31 22:46:16,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:16,277 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:16,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:16,468 INFO L130 PetriNetUnfolder]: 78/902 cut-off events. [2023-08-31 22:46:16,468 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:46:16,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:16,468 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:46:16,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:16,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash 269357184, now seen corresponding path program 1 times [2023-08-31 22:46:16,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:16,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728182228] [2023-08-31 22:46:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:16,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:16,492 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:16,529 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:16,529 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:16,529 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:16,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:46:16,530 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:16,530 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:16,530 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:16,530 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 22:46:16,782 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:16,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:46:17,992 INFO L130 PetriNetUnfolder]: 141/1943 cut-off events. [2023-08-31 22:46:17,992 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:46:18,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1943 events. 141/1943 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11799 event pairs, 0 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 1917. Up to 30 conditions per place. [2023-08-31 22:46:18,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:46:18,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:46:18,111 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:18,111 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:46:18,111 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:46:18,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:46:19,332 INFO L130 PetriNetUnfolder]: 141/1943 cut-off events. [2023-08-31 22:46:19,332 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:46:19,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1943 events. 141/1943 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11799 event pairs, 0 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 1917. Up to 30 conditions per place. [2023-08-31 22:46:19,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 2615116 [2023-08-31 22:46:46,123 INFO L134 LiptonReduction]: Checked pairs total: 9565905 [2023-08-31 22:46:46,123 INFO L136 LiptonReduction]: Total number of compositions: 1354 [2023-08-31 22:46:46,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:46,125 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:46,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:46,400 INFO L130 PetriNetUnfolder]: 84/976 cut-off events. [2023-08-31 22:46:46,400 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:46:46,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:46,401 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:46:46,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:46,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:46,401 INFO L85 PathProgramCache]: Analyzing trace with hash -576661935, now seen corresponding path program 1 times [2023-08-31 22:46:46,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:46,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059431991] [2023-08-31 22:46:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:46,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:46,437 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:46,461 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:46,461 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:46,461 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:46,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:46:46,462 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:46,462 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:46,462 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:46,462 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 22:46:46,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:46,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:46:47,805 INFO L130 PetriNetUnfolder]: 151/2079 cut-off events. [2023-08-31 22:46:47,806 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:46:47,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 2079 events. 151/2079 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12698 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 2070. Up to 32 conditions per place. [2023-08-31 22:46:47,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:46:48,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:46:48,005 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:48,005 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:46:48,005 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:46:48,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:46:49,142 INFO L130 PetriNetUnfolder]: 151/2079 cut-off events. [2023-08-31 22:46:49,142 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:46:49,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 2079 events. 151/2079 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12698 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 2070. Up to 32 conditions per place. [2023-08-31 22:46:50,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 3012540 [2023-08-31 22:47:21,163 INFO L134 LiptonReduction]: Checked pairs total: 9837000 [2023-08-31 22:47:21,163 INFO L136 LiptonReduction]: Total number of compositions: 1500 [2023-08-31 22:47:21,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:47:21,165 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:47:21,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:47:21,500 INFO L130 PetriNetUnfolder]: 91/1054 cut-off events. [2023-08-31 22:47:21,500 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:47:21,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:47:21,500 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:47:21,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:47:21,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:47:21,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1987508024, now seen corresponding path program 1 times [2023-08-31 22:47:21,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:47:21,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126872358] [2023-08-31 22:47:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:47:21,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:47:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:21,526 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:47:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:21,550 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:47:21,551 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:47:21,551 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:47:21,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:47:21,551 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:47:21,551 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:47:21,551 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:47:21,552 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 22:47:21,769 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:47:21,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:47:23,078 INFO L130 PetriNetUnfolder]: 161/2215 cut-off events. [2023-08-31 22:47:23,078 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:47:23,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 2215 events. 161/2215 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 13703 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 2224. Up to 34 conditions per place. [2023-08-31 22:47:23,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:47:23,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:47:23,288 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:47:23,288 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:47:23,288 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:47:23,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:47:24,553 INFO L130 PetriNetUnfolder]: 161/2215 cut-off events. [2023-08-31 22:47:24,553 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:47:24,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 2215 events. 161/2215 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 13703 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 2224. Up to 34 conditions per place. [2023-08-31 22:47:25,587 INFO L119 LiptonReduction]: Number of co-enabled transitions 3438048 [2023-08-31 22:48:00,073 INFO L134 LiptonReduction]: Checked pairs total: 12466357 [2023-08-31 22:48:00,074 INFO L136 LiptonReduction]: Total number of compositions: 1561 [2023-08-31 22:48:00,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:48:00,076 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:48:00,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:48:00,403 INFO L130 PetriNetUnfolder]: 98/1129 cut-off events. [2023-08-31 22:48:00,403 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:48:00,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:48:00,403 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:48:00,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:48:00,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:48:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash 983350106, now seen corresponding path program 1 times [2023-08-31 22:48:00,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:48:00,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434897868] [2023-08-31 22:48:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:48:00,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:48:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:00,432 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:48:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:00,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:48:00,460 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:48:00,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:48:00,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:48:00,460 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:48:00,461 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:48:00,461 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:48:00,461 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 22:48:00,786 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:48:00,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:48:02,401 INFO L130 PetriNetUnfolder]: 171/2351 cut-off events. [2023-08-31 22:48:02,401 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:48:02,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2351 events. 171/2351 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 14546 event pairs, 0 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 2379. Up to 36 conditions per place. [2023-08-31 22:48:02,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:48:02,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:48:02,603 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:48:02,603 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:48:02,603 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:48:02,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:48:04,337 INFO L130 PetriNetUnfolder]: 171/2351 cut-off events. [2023-08-31 22:48:04,337 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:48:04,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2351 events. 171/2351 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 14546 event pairs, 0 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 2379. Up to 36 conditions per place. [2023-08-31 22:48:05,010 INFO L119 LiptonReduction]: Number of co-enabled transitions 3891640 [2023-08-31 22:48:38,302 INFO L134 LiptonReduction]: Checked pairs total: 12664229 [2023-08-31 22:48:38,302 INFO L136 LiptonReduction]: Total number of compositions: 1624 [2023-08-31 22:48:38,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:48:38,314 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:48:38,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:48:38,750 INFO L130 PetriNetUnfolder]: 106/1209 cut-off events. [2023-08-31 22:48:38,750 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:48:38,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:48:38,750 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:48:38,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:48:38,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:48:38,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1990890871, now seen corresponding path program 1 times [2023-08-31 22:48:38,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:48:38,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744280331] [2023-08-31 22:48:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:48:38,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:48:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:38,779 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:48:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:38,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:48:38,805 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:48:38,806 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:48:38,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:48:38,806 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:48:38,806 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:48:38,806 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:48:38,806 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 22:48:39,048 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:48:39,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:48:40,749 INFO L130 PetriNetUnfolder]: 181/2487 cut-off events. [2023-08-31 22:48:40,749 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:48:40,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 2487 events. 181/2487 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 15515 event pairs, 0 based on Foata normal form. 0/1528 useless extension candidates. Maximal degree in co-relation 2535. Up to 38 conditions per place. [2023-08-31 22:48:40,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:48:40,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:48:40,980 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:48:40,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:48:40,981 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:48:40,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:48:42,733 INFO L130 PetriNetUnfolder]: 181/2487 cut-off events. [2023-08-31 22:48:42,734 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:48:42,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 2487 events. 181/2487 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 15515 event pairs, 0 based on Foata normal form. 0/1528 useless extension candidates. Maximal degree in co-relation 2535. Up to 38 conditions per place. [2023-08-31 22:48:43,700 INFO L119 LiptonReduction]: Number of co-enabled transitions 4373316 [2023-08-31 22:49:19,490 INFO L134 LiptonReduction]: Checked pairs total: 15781083 [2023-08-31 22:49:19,490 INFO L136 LiptonReduction]: Total number of compositions: 1756 [2023-08-31 22:49:19,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:49:19,492 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:49:19,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:49:19,915 INFO L130 PetriNetUnfolder]: 113/1285 cut-off events. [2023-08-31 22:49:19,915 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:49:19,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:49:19,915 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:49:19,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:49:19,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:49:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash -528127944, now seen corresponding path program 1 times [2023-08-31 22:49:19,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:49:19,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888949435] [2023-08-31 22:49:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:49:19,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:49:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:19,982 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:49:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:20,029 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:49:20,031 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:49:20,031 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:49:20,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:49:20,032 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:49:20,032 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:49:20,032 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:49:20,032 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 22:49:20,281 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:49:20,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:49:22,450 INFO L130 PetriNetUnfolder]: 191/2623 cut-off events. [2023-08-31 22:49:22,450 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:49:22,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 2623 events. 191/2623 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 16501 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 2692. Up to 40 conditions per place. [2023-08-31 22:49:22,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:49:22,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:49:22,686 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:49:22,687 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:49:22,687 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:49:22,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:49:25,098 INFO L130 PetriNetUnfolder]: 191/2623 cut-off events. [2023-08-31 22:49:25,099 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:49:25,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 2623 events. 191/2623 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 16501 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 2692. Up to 40 conditions per place. [2023-08-31 22:49:26,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 4883076 [2023-08-31 22:50:10,289 INFO L134 LiptonReduction]: Checked pairs total: 15716525 [2023-08-31 22:50:10,289 INFO L136 LiptonReduction]: Total number of compositions: 1855 [2023-08-31 22:50:10,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:50:10,291 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:50:10,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:50:10,787 INFO L130 PetriNetUnfolder]: 120/1363 cut-off events. [2023-08-31 22:50:10,788 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:50:10,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:50:10,788 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:50:10,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:50:10,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:50:10,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1617347922, now seen corresponding path program 1 times [2023-08-31 22:50:10,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:50:10,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846932077] [2023-08-31 22:50:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:50:10,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:50:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:10,832 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:50:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:10,868 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:50:10,868 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:50:10,868 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:50:10,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:50:10,868 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:50:10,870 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:50:10,870 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:50:10,870 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 22:50:11,157 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:50:11,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:50:13,673 INFO L130 PetriNetUnfolder]: 201/2759 cut-off events. [2023-08-31 22:50:13,673 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:50:13,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 2759 events. 201/2759 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 17404 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2850. Up to 42 conditions per place. [2023-08-31 22:50:13,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:50:13,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:50:13,936 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:50:13,936 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:50:13,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:50:13,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:50:15,984 INFO L130 PetriNetUnfolder]: 201/2759 cut-off events. [2023-08-31 22:50:15,985 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:50:16,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 2759 events. 201/2759 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 17404 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2850. Up to 42 conditions per place. [2023-08-31 22:50:17,045 INFO L119 LiptonReduction]: Number of co-enabled transitions 5420920 [2023-08-31 22:50:59,740 INFO L134 LiptonReduction]: Checked pairs total: 19338241 [2023-08-31 22:50:59,740 INFO L136 LiptonReduction]: Total number of compositions: 1925 [2023-08-31 22:50:59,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:50:59,742 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:50:59,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:51:00,323 INFO L130 PetriNetUnfolder]: 126/1437 cut-off events. [2023-08-31 22:51:00,323 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:51:00,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:51:00,323 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:51:00,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:51:00,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:51:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash -334844340, now seen corresponding path program 1 times [2023-08-31 22:51:00,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:51:00,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656860162] [2023-08-31 22:51:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:51:00,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:51:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:51:00,358 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:51:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:51:00,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:51:00,392 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:51:00,392 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:51:00,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:51:00,392 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:51:00,393 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:51:00,393 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:51:00,393 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 22:51:00,696 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:51:00,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:51:03,210 INFO L130 PetriNetUnfolder]: 211/2895 cut-off events. [2023-08-31 22:51:03,210 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:51:03,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 2895 events. 211/2895 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 18339 event pairs, 0 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3009. Up to 44 conditions per place. [2023-08-31 22:51:03,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:51:03,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:51:03,617 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:51:03,617 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:51:03,617 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:51:03,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:51:05,825 INFO L130 PetriNetUnfolder]: 211/2895 cut-off events. [2023-08-31 22:51:05,826 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:51:06,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 2895 events. 211/2895 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 18339 event pairs, 0 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3009. Up to 44 conditions per place. [2023-08-31 22:51:07,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 5986848 [2023-08-31 22:51:57,552 INFO L134 LiptonReduction]: Checked pairs total: 19463730 [2023-08-31 22:51:57,553 INFO L136 LiptonReduction]: Total number of compositions: 2019 [2023-08-31 22:51:57,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:51:57,555 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:51:57,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:51:58,125 INFO L130 PetriNetUnfolder]: 134/1517 cut-off events. [2023-08-31 22:51:58,125 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:51:58,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:51:58,125 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:51:58,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:51:58,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:51:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1825126112, now seen corresponding path program 1 times [2023-08-31 22:51:58,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:51:58,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539241348] [2023-08-31 22:51:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:51:58,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:51:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:51:58,231 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:51:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:51:58,266 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:51:58,267 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:51:58,267 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:51:58,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 22:51:58,267 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:51:58,268 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:51:58,268 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:51:58,268 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 22:51:58,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:51:58,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:52:01,211 INFO L130 PetriNetUnfolder]: 221/3031 cut-off events. [2023-08-31 22:52:01,211 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:52:01,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3351 conditions, 3031 events. 221/3031 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 19286 event pairs, 0 based on Foata normal form. 0/1860 useless extension candidates. Maximal degree in co-relation 3169. Up to 46 conditions per place. [2023-08-31 22:52:01,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:52:01,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:52:01,552 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:52:01,552 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:52:01,552 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:52:01,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:52:04,063 INFO L130 PetriNetUnfolder]: 221/3031 cut-off events. [2023-08-31 22:52:04,063 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:52:04,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3351 conditions, 3031 events. 221/3031 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 19286 event pairs, 0 based on Foata normal form. 0/1860 useless extension candidates. Maximal degree in co-relation 3169. Up to 46 conditions per place. [2023-08-31 22:52:05,378 INFO L119 LiptonReduction]: Number of co-enabled transitions 6580860 [2023-08-31 22:52:51,375 INFO L134 LiptonReduction]: Checked pairs total: 21103060 [2023-08-31 22:52:51,375 INFO L136 LiptonReduction]: Total number of compositions: 2147 [2023-08-31 22:52:51,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:52:51,377 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:52:51,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:52:52,148 INFO L130 PetriNetUnfolder]: 141/1596 cut-off events. [2023-08-31 22:52:52,148 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:52:52,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:52:52,149 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:52:52,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:52:52,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:52:52,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1522450882, now seen corresponding path program 1 times [2023-08-31 22:52:52,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:52:52,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606997196] [2023-08-31 22:52:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:52:52,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:52:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:52:52,208 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:52:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:52:52,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:52:52,250 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:52:52,250 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:52:52,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 22:52:52,251 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:52:52,251 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:52:52,251 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:52:52,251 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-31 22:52:52,708 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:52:52,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2617 places, 2778 transitions, 6177 flow [2023-08-31 22:52:55,518 INFO L130 PetriNetUnfolder]: 231/3167 cut-off events. [2023-08-31 22:52:55,518 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 22:52:55,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3513 conditions, 3167 events. 231/3167 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 20227 event pairs, 0 based on Foata normal form. 0/1943 useless extension candidates. Maximal degree in co-relation 3330. Up to 48 conditions per place. [2023-08-31 22:52:55,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 2617 places, 2778 transitions, 6177 flow [2023-08-31 22:52:55,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2617 places, 2778 transitions, 6177 flow [2023-08-31 22:52:55,892 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:52:55,893 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2617 places, 2778 transitions, 6177 flow [2023-08-31 22:52:55,893 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2617 places, 2778 transitions, 6177 flow [2023-08-31 22:52:55,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2617 places, 2778 transitions, 6177 flow [2023-08-31 22:52:58,624 INFO L130 PetriNetUnfolder]: 231/3167 cut-off events. [2023-08-31 22:52:58,625 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 22:52:58,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3513 conditions, 3167 events. 231/3167 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 20227 event pairs, 0 based on Foata normal form. 0/1943 useless extension candidates. Maximal degree in co-relation 3330. Up to 48 conditions per place. [2023-08-31 22:53:00,052 INFO L119 LiptonReduction]: Number of co-enabled transitions 7202956 [2023-08-31 22:53:55,887 INFO L134 LiptonReduction]: Checked pairs total: 23584982 [2023-08-31 22:53:55,888 INFO L136 LiptonReduction]: Total number of compositions: 2219 [2023-08-31 22:53:55,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:53:55,892 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:53:55,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:53:56,623 INFO L130 PetriNetUnfolder]: 147/1669 cut-off events. [2023-08-31 22:53:56,623 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 22:53:56,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:53:56,624 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:53:56,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:53:56,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:53:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1426035958, now seen corresponding path program 1 times [2023-08-31 22:53:56,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:53:56,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469532056] [2023-08-31 22:53:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:53:56,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:53:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:53:56,691 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:53:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:53:56,751 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:53:56,752 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:53:56,752 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:53:56,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 22:53:56,752 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:53:56,752 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:53:56,752 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:53:56,752 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-31 22:53:57,240 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:53:57,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2729 places, 2897 transitions, 6466 flow [2023-08-31 22:54:00,463 INFO L130 PetriNetUnfolder]: 241/3303 cut-off events. [2023-08-31 22:54:00,463 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 22:54:00,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3676 conditions, 3303 events. 241/3303 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 21115 event pairs, 0 based on Foata normal form. 0/2026 useless extension candidates. Maximal degree in co-relation 3492. Up to 50 conditions per place. [2023-08-31 22:54:00,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 2729 places, 2897 transitions, 6466 flow [2023-08-31 22:54:00,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2729 places, 2897 transitions, 6466 flow [2023-08-31 22:54:00,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:54:00,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2729 places, 2897 transitions, 6466 flow [2023-08-31 22:54:00,878 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2729 places, 2897 transitions, 6466 flow [2023-08-31 22:54:00,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2729 places, 2897 transitions, 6466 flow [2023-08-31 22:54:03,829 INFO L130 PetriNetUnfolder]: 241/3303 cut-off events. [2023-08-31 22:54:03,829 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 22:54:04,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3676 conditions, 3303 events. 241/3303 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 21115 event pairs, 0 based on Foata normal form. 0/2026 useless extension candidates. Maximal degree in co-relation 3492. Up to 50 conditions per place. [2023-08-31 22:54:05,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 7853136 [2023-08-31 22:54:57,525 INFO L134 LiptonReduction]: Checked pairs total: 28736922 [2023-08-31 22:54:57,526 INFO L136 LiptonReduction]: Total number of compositions: 2332 [2023-08-31 22:54:57,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:54:57,528 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:54:57,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:54:58,312 INFO L130 PetriNetUnfolder]: 155/1748 cut-off events. [2023-08-31 22:54:58,313 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 22:54:58,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:54:58,313 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:54:58,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:54:58,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:54:58,313 INFO L85 PathProgramCache]: Analyzing trace with hash 700153998, now seen corresponding path program 1 times [2023-08-31 22:54:58,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:54:58,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177926308] [2023-08-31 22:54:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:54:58,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:54:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:54:58,362 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:54:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:54:58,402 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:54:58,402 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:54:58,402 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:54:58,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 22:54:58,403 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:54:58,403 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:54:58,403 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:54:58,403 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-31 22:54:58,823 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:54:58,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2841 places, 3016 transitions, 6757 flow [2023-08-31 22:55:02,173 INFO L130 PetriNetUnfolder]: 251/3439 cut-off events. [2023-08-31 22:55:02,173 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 22:55:02,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3840 conditions, 3439 events. 251/3439 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 22017 event pairs, 0 based on Foata normal form. 0/2109 useless extension candidates. Maximal degree in co-relation 3655. Up to 52 conditions per place. [2023-08-31 22:55:02,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 2841 places, 3016 transitions, 6757 flow [2023-08-31 22:55:02,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2841 places, 3016 transitions, 6757 flow [2023-08-31 22:55:02,750 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:55:02,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2841 places, 3016 transitions, 6757 flow [2023-08-31 22:55:02,750 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2841 places, 3016 transitions, 6757 flow [2023-08-31 22:55:02,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2841 places, 3016 transitions, 6757 flow [2023-08-31 22:55:07,288 INFO L130 PetriNetUnfolder]: 251/3439 cut-off events. [2023-08-31 22:55:07,288 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 22:55:07,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3840 conditions, 3439 events. 251/3439 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 22017 event pairs, 0 based on Foata normal form. 0/2109 useless extension candidates. Maximal degree in co-relation 3655. Up to 52 conditions per place. [2023-08-31 22:55:09,195 INFO L119 LiptonReduction]: Number of co-enabled transitions 8531400 [2023-08-31 22:56:07,817 INFO L134 LiptonReduction]: Checked pairs total: 27781304 [2023-08-31 22:56:07,817 INFO L136 LiptonReduction]: Total number of compositions: 2434 [2023-08-31 22:56:07,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:56:07,819 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;@6462c31, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:56:07,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:56:08,777 INFO L130 PetriNetUnfolder]: 161/1825 cut-off events. [2023-08-31 22:56:08,777 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 22:56:08,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:56:08,778 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:56:08,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:56:08,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:56:08,785 INFO L85 PathProgramCache]: Analyzing trace with hash 161087428, now seen corresponding path program 1 times [2023-08-31 22:56:08,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:56:08,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927492364] [2023-08-31 22:56:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:56:08,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:56:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:56:08,838 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:56:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:56:08,883 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:56:08,883 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:56:08,883 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:56:08,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 22:56:08,884 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:56:08,884 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:56:08,884 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:56:08,884 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-31 22:56:09,398 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:56:09,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2953 places, 3135 transitions, 7050 flow [2023-08-31 22:56:13,456 INFO L130 PetriNetUnfolder]: 261/3575 cut-off events. [2023-08-31 22:56:13,457 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 22:56:13,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4005 conditions, 3575 events. 261/3575 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 22984 event pairs, 0 based on Foata normal form. 0/2192 useless extension candidates. Maximal degree in co-relation 3819. Up to 54 conditions per place. [2023-08-31 22:56:13,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 2953 places, 3135 transitions, 7050 flow [2023-08-31 22:56:13,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2953 places, 3135 transitions, 7050 flow [2023-08-31 22:56:13,921 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:56:13,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2953 places, 3135 transitions, 7050 flow [2023-08-31 22:56:13,922 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2953 places, 3135 transitions, 7050 flow [2023-08-31 22:56:13,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2953 places, 3135 transitions, 7050 flow [2023-08-31 22:56:17,618 INFO L130 PetriNetUnfolder]: 261/3575 cut-off events. [2023-08-31 22:56:17,618 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 22:56:18,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4005 conditions, 3575 events. 261/3575 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 22984 event pairs, 0 based on Foata normal form. 0/2192 useless extension candidates. Maximal degree in co-relation 3819. Up to 54 conditions per place. [2023-08-31 22:56:19,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 9237748 Killed by 15