./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.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/goblint-regression/28-race_reach_02-simple_racefree.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 b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:26:12,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:26:12,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:26:12,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:26:12,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:26:12,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:26:12,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:26:12,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:26:12,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:26:12,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:26:12,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:26:12,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:26:12,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:26:12,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:26:12,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:26:12,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:26:12,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:26:12,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:26:12,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:26:12,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:26:12,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:26:12,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:26:12,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:26:12,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:26:12,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:26:12,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:26:12,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:26:12,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:26:12,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:26:12,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:26:12,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:26:12,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:26:12,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:26:12,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:26:12,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:26:12,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:26:12,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:26:12,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:26:12,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:26:12,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:26:12,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:26:12,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:26:12,278 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:26:12,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:26:12,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:26:12,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:26:12,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:26:12,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:26:12,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:26:12,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:26:12,280 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:26:12,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:26:12,280 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:26:12,280 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:26:12,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:26:12,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:26:12,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:26:12,281 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:26:12,281 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:26:12,281 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:26:12,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:26:12,281 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:26:12,281 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:26:12,281 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:26:12,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:26:12,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:26:12,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:26:12,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:26:12,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:26:12,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:26:12,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:26:12,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:26:12,282 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:26:12,282 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:26:12,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:26:12,282 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:26:12,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:26:12,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:26:12,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:26:12,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:26:12,640 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:26:12,641 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:26:12,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-09-01 00:26:13,829 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:26:14,151 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:26:14,153 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-09-01 00:26:14,164 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f5c0322b/4f589acdfb0b447983baa2085f578c9c/FLAG1c083792f [2023-09-01 00:26:14,178 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f5c0322b/4f589acdfb0b447983baa2085f578c9c [2023-09-01 00:26:14,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:26:14,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:26:14,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:26:14,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:26:14,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:26:14,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58970049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14, skipping insertion in model container [2023-09-01 00:26:14,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:26:14,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:26:14,484 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2023-09-01 00:26:14,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:26:14,536 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:26:14,588 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2023-09-01 00:26:14,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:26:14,643 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:26:14,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14 WrapperNode [2023-09-01 00:26:14,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:26:14,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:26:14,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:26:14,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:26:14,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,707 INFO L138 Inliner]: procedures = 170, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-09-01 00:26:14,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:26:14,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:26:14,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:26:14,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:26:14,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,748 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:26:14,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:26:14,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:26:14,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:26:14,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (1/1) ... [2023-09-01 00:26:14,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:26:14,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:26:14,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 00:26:14,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 00:26:14,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:26:14,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:26:14,831 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:26:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:26:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:26:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:26:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:26:14,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:26:14,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:26:14,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:26:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:26:14,837 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:26:14,946 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:26:14,948 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:26:15,173 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:26:15,184 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:26:15,184 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-09-01 00:26:15,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:26:15 BoogieIcfgContainer [2023-09-01 00:26:15,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:26:15,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:26:15,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:26:15,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:26:15,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:26:14" (1/3) ... [2023-09-01 00:26:15,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e735f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:26:15, skipping insertion in model container [2023-09-01 00:26:15,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:14" (2/3) ... [2023-09-01 00:26:15,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e735f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:26:15, skipping insertion in model container [2023-09-01 00:26:15,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:26:15" (3/3) ... [2023-09-01 00:26:15,195 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2023-09-01 00:26:15,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:26:15,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-09-01 00:26:15,212 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:26:15,300 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:26:15,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 116 transitions, 240 flow [2023-09-01 00:26:15,388 INFO L130 PetriNetUnfolder]: 17/156 cut-off events. [2023-09-01 00:26:15,388 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 00:26:15,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 376 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-09-01 00:26:15,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 116 transitions, 240 flow [2023-09-01 00:26:15,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 111 transitions, 227 flow [2023-09-01 00:26:15,407 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:15,415 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 111 transitions, 227 flow [2023-09-01 00:26:15,418 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 111 transitions, 227 flow [2023-09-01 00:26:15,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 111 transitions, 227 flow [2023-09-01 00:26:15,450 INFO L130 PetriNetUnfolder]: 16/151 cut-off events. [2023-09-01 00:26:15,451 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:26:15,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 361 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-09-01 00:26:15,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 2576 [2023-09-01 00:26:18,415 INFO L134 LiptonReduction]: Checked pairs total: 4482 [2023-09-01 00:26:18,415 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-09-01 00:26:18,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:26:18,434 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:26:18,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:26:18,440 INFO L130 PetriNetUnfolder]: 3/32 cut-off events. [2023-09-01 00:26:18,441 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:26:18,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:18,442 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 00:26:18,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:26:18,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:18,447 INFO L85 PathProgramCache]: Analyzing trace with hash 103054096, now seen corresponding path program 1 times [2023-09-01 00:26:18,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:26:18,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910949443] [2023-09-01 00:26:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:26:18,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:26:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:18,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:26:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:18,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:26:18,663 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:26:18,664 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:26:18,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:26:18,666 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:26:18,669 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:26:18,669 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:26:18,670 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:26:18,688 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:26:18,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 146 transitions, 310 flow [2023-09-01 00:26:18,751 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-09-01 00:26:18,751 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:26:18,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-09-01 00:26:18,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 146 transitions, 310 flow [2023-09-01 00:26:18,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 146 transitions, 310 flow [2023-09-01 00:26:18,759 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:18,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 146 transitions, 310 flow [2023-09-01 00:26:18,761 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 146 transitions, 310 flow [2023-09-01 00:26:18,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 146 transitions, 310 flow [2023-09-01 00:26:18,806 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-09-01 00:26:18,806 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:26:18,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-09-01 00:26:18,816 INFO L119 LiptonReduction]: Number of co-enabled transitions 7336 [2023-09-01 00:26:21,485 INFO L134 LiptonReduction]: Checked pairs total: 17002 [2023-09-01 00:26:21,486 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-09-01 00:26:21,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:26:21,489 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:26:21,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:26:21,496 INFO L130 PetriNetUnfolder]: 10/68 cut-off events. [2023-09-01 00:26:21,496 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:26:21,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:21,497 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 00:26:21,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:26:21,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash 487006941, now seen corresponding path program 1 times [2023-09-01 00:26:21,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:26:21,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534224432] [2023-09-01 00:26:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:26:21,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:26:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:21,542 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:26:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:21,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:26:21,590 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:26:21,591 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:26:21,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 00:26:21,592 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:26:21,593 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:26:21,593 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:26:21,597 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:26:21,621 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:26:21,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 176 transitions, 382 flow [2023-09-01 00:26:21,668 INFO L130 PetriNetUnfolder]: 50/395 cut-off events. [2023-09-01 00:26:21,669 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:26:21,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 395 events. 50/395 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-09-01 00:26:21,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 176 transitions, 382 flow [2023-09-01 00:26:21,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 176 transitions, 382 flow [2023-09-01 00:26:21,674 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:21,675 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 176 transitions, 382 flow [2023-09-01 00:26:21,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 176 transitions, 382 flow [2023-09-01 00:26:21,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 176 transitions, 382 flow [2023-09-01 00:26:21,711 INFO L130 PetriNetUnfolder]: 50/395 cut-off events. [2023-09-01 00:26:21,711 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:26:21,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 395 events. 50/395 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-09-01 00:26:21,725 INFO L119 LiptonReduction]: Number of co-enabled transitions 13608 [2023-09-01 00:26:24,277 INFO L134 LiptonReduction]: Checked pairs total: 36010 [2023-09-01 00:26:24,278 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-09-01 00:26:24,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:26:24,281 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:26:24,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:26:24,292 INFO L130 PetriNetUnfolder]: 22/114 cut-off events. [2023-09-01 00:26:24,292 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:26:24,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:24,292 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 00:26:24,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:26:24,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:24,293 INFO L85 PathProgramCache]: Analyzing trace with hash -137567506, now seen corresponding path program 1 times [2023-09-01 00:26:24,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:26:24,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727469001] [2023-09-01 00:26:24,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:26:24,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:26:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:24,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:26:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:24,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:26:24,340 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:26:24,341 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:26:24,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 00:26:24,341 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:26:24,342 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:26:24,342 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:26:24,342 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 00:26:24,362 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:26:24,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 206 transitions, 456 flow [2023-09-01 00:26:24,450 INFO L130 PetriNetUnfolder]: 81/619 cut-off events. [2023-09-01 00:26:24,450 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:26:24,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 619 events. 81/619 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2497 event pairs, 6 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 415. Up to 32 conditions per place. [2023-09-01 00:26:24,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 206 transitions, 456 flow [2023-09-01 00:26:24,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 206 transitions, 456 flow [2023-09-01 00:26:24,457 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:24,457 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 206 transitions, 456 flow [2023-09-01 00:26:24,458 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 206 transitions, 456 flow [2023-09-01 00:26:24,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 206 transitions, 456 flow [2023-09-01 00:26:24,527 INFO L130 PetriNetUnfolder]: 81/619 cut-off events. [2023-09-01 00:26:24,527 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:26:24,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 619 events. 81/619 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2497 event pairs, 6 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 415. Up to 32 conditions per place. [2023-09-01 00:26:24,552 INFO L119 LiptonReduction]: Number of co-enabled transitions 21616 [2023-09-01 00:26:27,406 INFO L134 LiptonReduction]: Checked pairs total: 65446 [2023-09-01 00:26:27,408 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-09-01 00:26:27,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:26:27,412 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:26:27,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:26:27,428 INFO L130 PetriNetUnfolder]: 29/157 cut-off events. [2023-09-01 00:26:27,429 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 00:26:27,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:27,429 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 00:26:27,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:26:27,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1377386522, now seen corresponding path program 1 times [2023-09-01 00:26:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:26:27,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003560954] [2023-09-01 00:26:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:26:27,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:26:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:27,482 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:26:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:27,530 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:26:27,533 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:26:27,534 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:26:27,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:26:27,535 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:26:27,535 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:26:27,536 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:26:27,536 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 00:26:27,566 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-09-01 00:26:27,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 236 transitions, 532 flow [2023-09-01 00:26:27,712 INFO L130 PetriNetUnfolder]: 140/1015 cut-off events. [2023-09-01 00:26:27,712 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 00:26:27,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1015 events. 140/1015 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5038 event pairs, 23 based on Foata normal form. 0/777 useless extension candidates. Maximal degree in co-relation 664. Up to 80 conditions per place. [2023-09-01 00:26:27,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 236 transitions, 532 flow [2023-09-01 00:26:27,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 236 transitions, 532 flow [2023-09-01 00:26:27,727 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:27,727 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 236 transitions, 532 flow [2023-09-01 00:26:27,728 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 236 transitions, 532 flow [2023-09-01 00:26:27,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 236 transitions, 532 flow [2023-09-01 00:26:27,868 INFO L130 PetriNetUnfolder]: 140/1015 cut-off events. [2023-09-01 00:26:27,868 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 00:26:27,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1015 events. 140/1015 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5038 event pairs, 23 based on Foata normal form. 0/777 useless extension candidates. Maximal degree in co-relation 664. Up to 80 conditions per place. [2023-09-01 00:26:27,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 31360 [2023-09-01 00:26:30,576 INFO L134 LiptonReduction]: Checked pairs total: 98479 [2023-09-01 00:26:30,576 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-09-01 00:26:30,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:26:30,578 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:26:30,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:26:30,595 INFO L130 PetriNetUnfolder]: 46/226 cut-off events. [2023-09-01 00:26:30,595 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 00:26:30,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:30,596 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:26:30,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:26:30,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash -85892964, now seen corresponding path program 1 times [2023-09-01 00:26:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:26:30,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338219963] [2023-09-01 00:26:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:26:30,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:26:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:30,622 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:26:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:30,640 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:26:30,641 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:26:30,641 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:26:30,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:26:30,641 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:26:30,642 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:26:30,642 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:26:30,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 00:26:30,662 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 00:26:30,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 266 transitions, 610 flow [2023-09-01 00:26:30,974 INFO L130 PetriNetUnfolder]: 263/1763 cut-off events. [2023-09-01 00:26:30,975 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 00:26:30,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1995 conditions, 1763 events. 263/1763 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10727 event pairs, 72 based on Foata normal form. 0/1351 useless extension candidates. Maximal degree in co-relation 1114. Up to 192 conditions per place. [2023-09-01 00:26:30,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 266 transitions, 610 flow [2023-09-01 00:26:31,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 266 transitions, 610 flow [2023-09-01 00:26:31,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:31,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 266 transitions, 610 flow [2023-09-01 00:26:31,008 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 266 transitions, 610 flow [2023-09-01 00:26:31,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 266 transitions, 610 flow [2023-09-01 00:26:31,281 INFO L130 PetriNetUnfolder]: 263/1763 cut-off events. [2023-09-01 00:26:31,282 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 00:26:31,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1995 conditions, 1763 events. 263/1763 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10727 event pairs, 72 based on Foata normal form. 0/1351 useless extension candidates. Maximal degree in co-relation 1114. Up to 192 conditions per place. [2023-09-01 00:26:31,359 INFO L119 LiptonReduction]: Number of co-enabled transitions 42840 [2023-09-01 00:26:34,384 INFO L134 LiptonReduction]: Checked pairs total: 135882 [2023-09-01 00:26:34,384 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-09-01 00:26:34,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:26:34,386 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:26:34,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:26:34,416 INFO L130 PetriNetUnfolder]: 56/287 cut-off events. [2023-09-01 00:26:34,416 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-09-01 00:26:34,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:34,417 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:26:34,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:26:34,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash -32438325, now seen corresponding path program 1 times [2023-09-01 00:26:34,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:26:34,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814389549] [2023-09-01 00:26:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:26:34,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:26:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:34,463 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:26:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:34,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:26:34,514 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:26:34,514 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:26:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 00:26:34,514 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:26:34,515 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:26:34,517 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:26:34,517 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 00:26:34,547 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-09-01 00:26:34,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 296 transitions, 690 flow [2023-09-01 00:26:35,155 INFO L130 PetriNetUnfolder]: 530/3231 cut-off events. [2023-09-01 00:26:35,156 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 00:26:35,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3729 conditions, 3231 events. 530/3231 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 24251 event pairs, 201 based on Foata normal form. 0/2485 useless extension candidates. Maximal degree in co-relation 1981. Up to 448 conditions per place. [2023-09-01 00:26:35,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 296 transitions, 690 flow [2023-09-01 00:26:35,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 296 transitions, 690 flow [2023-09-01 00:26:35,201 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:35,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 296 transitions, 690 flow [2023-09-01 00:26:35,201 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 296 transitions, 690 flow [2023-09-01 00:26:35,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 296 transitions, 690 flow [2023-09-01 00:26:35,750 INFO L130 PetriNetUnfolder]: 530/3231 cut-off events. [2023-09-01 00:26:35,750 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 00:26:35,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3729 conditions, 3231 events. 530/3231 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 24251 event pairs, 201 based on Foata normal form. 0/2485 useless extension candidates. Maximal degree in co-relation 1981. Up to 448 conditions per place. [2023-09-01 00:26:35,872 INFO L119 LiptonReduction]: Number of co-enabled transitions 56056 [2023-09-01 00:26:38,956 INFO L134 LiptonReduction]: Checked pairs total: 161912 [2023-09-01 00:26:38,956 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-09-01 00:26:38,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:26:38,958 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:26:38,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:26:38,985 INFO L130 PetriNetUnfolder]: 83/398 cut-off events. [2023-09-01 00:26:38,985 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 00:26:38,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:38,986 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:26:38,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:26:38,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:38,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1823734738, now seen corresponding path program 1 times [2023-09-01 00:26:38,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:26:38,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176815266] [2023-09-01 00:26:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:26:38,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:26:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:39,006 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:26:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:39,024 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:26:39,025 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:26:39,025 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:26:39,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 00:26:39,025 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:26:39,026 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:26:39,026 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:26:39,026 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 00:26:39,082 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-09-01 00:26:39,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 326 transitions, 772 flow [2023-09-01 00:26:40,414 INFO L130 PetriNetUnfolder]: 1117/6171 cut-off events. [2023-09-01 00:26:40,414 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 00:26:40,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7256 conditions, 6171 events. 1117/6171 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 54539 event pairs, 522 based on Foata normal form. 0/4771 useless extension candidates. Maximal degree in co-relation 3713. Up to 1024 conditions per place. [2023-09-01 00:26:40,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 326 transitions, 772 flow [2023-09-01 00:26:40,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 326 transitions, 772 flow [2023-09-01 00:26:40,536 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:40,536 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 326 transitions, 772 flow [2023-09-01 00:26:40,537 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 326 transitions, 772 flow [2023-09-01 00:26:40,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 326 transitions, 772 flow [2023-09-01 00:26:41,602 INFO L130 PetriNetUnfolder]: 1117/6171 cut-off events. [2023-09-01 00:26:41,602 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 00:26:41,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7256 conditions, 6171 events. 1117/6171 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 54539 event pairs, 522 based on Foata normal form. 0/4771 useless extension candidates. Maximal degree in co-relation 3713. Up to 1024 conditions per place. [2023-09-01 00:26:41,874 INFO L119 LiptonReduction]: Number of co-enabled transitions 71008 [2023-09-01 00:26:44,961 INFO L134 LiptonReduction]: Checked pairs total: 209868 [2023-09-01 00:26:44,961 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-09-01 00:26:44,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:26:44,963 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:26:44,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:26:45,002 INFO L130 PetriNetUnfolder]: 105/518 cut-off events. [2023-09-01 00:26:45,002 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2023-09-01 00:26:45,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:45,003 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:26:45,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:26:45,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash -878287253, now seen corresponding path program 1 times [2023-09-01 00:26:45,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:26:45,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532235404] [2023-09-01 00:26:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:26:45,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:26:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:45,024 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:26:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:45,044 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:26:45,045 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:26:45,045 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:26:45,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:26:45,045 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:26:45,046 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:26:45,046 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:26:45,046 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 00:26:45,074 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-09-01 00:26:45,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 356 transitions, 856 flow [2023-09-01 00:26:47,342 INFO L130 PetriNetUnfolder]: 2408/12119 cut-off events. [2023-09-01 00:26:47,342 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 00:26:47,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14496 conditions, 12119 events. 2408/12119 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 123086 event pairs, 1291 based on Foata normal form. 0/9425 useless extension candidates. Maximal degree in co-relation 7238. Up to 2304 conditions per place. [2023-09-01 00:26:47,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 356 transitions, 856 flow [2023-09-01 00:26:47,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 307 places, 356 transitions, 856 flow [2023-09-01 00:26:47,517 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:47,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 307 places, 356 transitions, 856 flow [2023-09-01 00:26:47,518 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 307 places, 356 transitions, 856 flow [2023-09-01 00:26:47,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 356 transitions, 856 flow [2023-09-01 00:26:49,626 INFO L130 PetriNetUnfolder]: 2408/12119 cut-off events. [2023-09-01 00:26:49,627 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 00:26:49,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14496 conditions, 12119 events. 2408/12119 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 123086 event pairs, 1291 based on Foata normal form. 0/9425 useless extension candidates. Maximal degree in co-relation 7238. Up to 2304 conditions per place. [2023-09-01 00:26:50,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 87696 [2023-09-01 00:26:53,236 INFO L134 LiptonReduction]: Checked pairs total: 256654 [2023-09-01 00:26:53,236 INFO L136 LiptonReduction]: Total number of compositions: 217 [2023-09-01 00:26:53,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:26:53,238 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:26:53,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:26:53,362 INFO L130 PetriNetUnfolder]: 150/713 cut-off events. [2023-09-01 00:26:53,362 INFO L131 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2023-09-01 00:26:53,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:26:53,362 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:26:53,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:26:53,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:26:53,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1522579183, now seen corresponding path program 1 times [2023-09-01 00:26:53,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:26:53,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804411578] [2023-09-01 00:26:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:26:53,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:26:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:53,403 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:26:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:26:53,430 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:26:53,431 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:26:53,431 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:26:53,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:26:53,431 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:26:53,434 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:26:53,434 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:26:53,434 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 00:26:53,472 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-09-01 00:26:53,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 386 transitions, 942 flow [2023-09-01 00:26:58,357 INFO L130 PetriNetUnfolder]: 5235/24211 cut-off events. [2023-09-01 00:26:58,357 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 00:26:58,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29417 conditions, 24211 events. 5235/24211 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 279838 event pairs, 3084 based on Foata normal form. 0/18943 useless extension candidates. Maximal degree in co-relation 14476. Up to 5120 conditions per place. [2023-09-01 00:26:58,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 386 transitions, 942 flow [2023-09-01 00:26:58,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 386 transitions, 942 flow [2023-09-01 00:26:58,804 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:26:58,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 386 transitions, 942 flow [2023-09-01 00:26:58,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 386 transitions, 942 flow [2023-09-01 00:26:58,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 386 transitions, 942 flow [2023-09-01 00:27:03,512 INFO L130 PetriNetUnfolder]: 5235/24211 cut-off events. [2023-09-01 00:27:03,512 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 00:27:03,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29417 conditions, 24211 events. 5235/24211 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 279838 event pairs, 3084 based on Foata normal form. 0/18943 useless extension candidates. Maximal degree in co-relation 14476. Up to 5120 conditions per place. [2023-09-01 00:27:04,804 INFO L119 LiptonReduction]: Number of co-enabled transitions 106120 [2023-09-01 00:27:07,903 INFO L134 LiptonReduction]: Checked pairs total: 320276 [2023-09-01 00:27:07,904 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-09-01 00:27:07,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:07,905 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:07,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:08,069 INFO L130 PetriNetUnfolder]: 234/1029 cut-off events. [2023-09-01 00:27:08,069 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-09-01 00:27:08,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:08,070 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:27:08,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:08,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:08,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1941075956, now seen corresponding path program 1 times [2023-09-01 00:27:08,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:08,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596711586] [2023-09-01 00:27:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:08,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:08,105 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:08,129 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:08,129 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:08,129 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:08,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 00:27:08,130 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:08,130 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:08,130 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:08,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 00:27:08,159 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-09-01 00:27:08,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 357 places, 416 transitions, 1030 flow [2023-09-01 00:27:19,760 INFO L130 PetriNetUnfolder]: 11390/48847 cut-off events. [2023-09-01 00:27:19,760 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 00:27:20,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60211 conditions, 48847 events. 11390/48847 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 630559 event pairs, 7181 based on Foata normal form. 0/38445 useless extension candidates. Maximal degree in co-relation 29395. Up to 11264 conditions per place. [2023-09-01 00:27:20,756 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 416 transitions, 1030 flow [2023-09-01 00:27:21,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 416 transitions, 1030 flow [2023-09-01 00:27:21,323 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:21,323 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 357 places, 416 transitions, 1030 flow [2023-09-01 00:27:21,323 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 357 places, 416 transitions, 1030 flow [2023-09-01 00:27:21,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 357 places, 416 transitions, 1030 flow [2023-09-01 00:27:31,834 INFO L130 PetriNetUnfolder]: 11390/48847 cut-off events. [2023-09-01 00:27:31,834 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 00:27:33,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60211 conditions, 48847 events. 11390/48847 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 630559 event pairs, 7181 based on Foata normal form. 0/38445 useless extension candidates. Maximal degree in co-relation 29395. Up to 11264 conditions per place. [2023-09-01 00:27:35,645 INFO L119 LiptonReduction]: Number of co-enabled transitions 126280 [2023-09-01 00:27:39,116 INFO L134 LiptonReduction]: Checked pairs total: 431154 [2023-09-01 00:27:39,116 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-09-01 00:27:39,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:39,118 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:39,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:39,249 INFO L130 PetriNetUnfolder]: 360/1482 cut-off events. [2023-09-01 00:27:39,250 INFO L131 PetriNetUnfolder]: For 713/713 co-relation queries the response was YES. [2023-09-01 00:27:39,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:39,250 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:27:39,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:39,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2106502534, now seen corresponding path program 1 times [2023-09-01 00:27:39,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:39,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549977801] [2023-09-01 00:27:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:39,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:39,277 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:39,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:39,299 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:39,299 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:39,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 00:27:39,299 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:39,300 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:39,300 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:39,300 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 00:27:39,329 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-09-01 00:27:39,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 382 places, 446 transitions, 1120 flow [2023-09-01 00:28:02,832 INFO L130 PetriNetUnfolder]: 24713/99083 cut-off events. [2023-09-01 00:28:02,832 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 00:28:05,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123774 conditions, 99083 events. 24713/99083 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2195. Compared 1387851 event pairs, 16398 based on Foata normal form. 0/78427 useless extension candidates. Maximal degree in co-relation 60187. Up to 24576 conditions per place. [2023-09-01 00:28:05,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 382 places, 446 transitions, 1120 flow [2023-09-01 00:28:07,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 382 places, 446 transitions, 1120 flow [2023-09-01 00:28:07,551 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:28:07,551 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 382 places, 446 transitions, 1120 flow [2023-09-01 00:28:07,551 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 382 places, 446 transitions, 1120 flow [2023-09-01 00:28:07,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 382 places, 446 transitions, 1120 flow [2023-09-01 00:28:32,161 INFO L130 PetriNetUnfolder]: 24713/99083 cut-off events. [2023-09-01 00:28:32,161 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 00:28:35,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123774 conditions, 99083 events. 24713/99083 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2195. Compared 1387851 event pairs, 16398 based on Foata normal form. 0/78427 useless extension candidates. Maximal degree in co-relation 60187. Up to 24576 conditions per place. [2023-09-01 00:28:43,378 INFO L119 LiptonReduction]: Number of co-enabled transitions 148176 [2023-09-01 00:28:46,679 INFO L134 LiptonReduction]: Checked pairs total: 508005 [2023-09-01 00:28:46,679 INFO L136 LiptonReduction]: Total number of compositions: 262 [2023-09-01 00:28:46,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:28:46,681 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:28:46,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:28:46,868 INFO L130 PetriNetUnfolder]: 560/2158 cut-off events. [2023-09-01 00:28:46,868 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-09-01 00:28:46,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:28:46,869 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:28:46,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:28:46,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:28:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2117002136, now seen corresponding path program 1 times [2023-09-01 00:28:46,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:28:46,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919331110] [2023-09-01 00:28:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:28:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:28:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:28:46,892 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:28:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:28:46,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:28:46,943 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:28:46,944 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:28:46,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:28:46,944 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:28:46,946 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:28:46,947 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:28:46,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 00:28:46,980 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-09-01 00:28:46,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 407 places, 476 transitions, 1212 flow [2023-09-01 00:29:43,961 INFO L130 PetriNetUnfolder]: 53396/201543 cut-off events. [2023-09-01 00:29:43,962 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 00:29:53,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254922 conditions, 201543 events. 53396/201543 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4209. Compared 3081699 event pairs, 36879 based on Foata normal form. 0/160393 useless extension candidates. Maximal degree in co-relation 123748. Up to 53248 conditions per place. [2023-09-01 00:29:53,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 407 places, 476 transitions, 1212 flow [2023-09-01 00:29:57,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 407 places, 476 transitions, 1212 flow [2023-09-01 00:29:57,734 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:29:57,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 407 places, 476 transitions, 1212 flow [2023-09-01 00:29:57,735 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 407 places, 476 transitions, 1212 flow [2023-09-01 00:29:57,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 407 places, 476 transitions, 1212 flow [2023-09-01 00:30:51,599 INFO L130 PetriNetUnfolder]: 53396/201543 cut-off events. [2023-09-01 00:30:51,600 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 00:30:59,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254922 conditions, 201543 events. 53396/201543 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4209. Compared 3081699 event pairs, 36879 based on Foata normal form. 0/160393 useless extension candidates. Maximal degree in co-relation 123748. Up to 53248 conditions per place. [2023-09-01 00:31:22,689 INFO L119 LiptonReduction]: Number of co-enabled transitions 171808 [2023-09-01 00:31:26,863 INFO L134 LiptonReduction]: Checked pairs total: 522900 [2023-09-01 00:31:26,864 INFO L136 LiptonReduction]: Total number of compositions: 277 [2023-09-01 00:31:26,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:31:26,866 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;@7d96eb72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:31:26,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:31:27,349 INFO L130 PetriNetUnfolder]: 913/3240 cut-off events. [2023-09-01 00:31:27,350 INFO L131 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2023-09-01 00:31:27,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:31:27,350 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:31:27,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:31:27,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:31:27,351 INFO L85 PathProgramCache]: Analyzing trace with hash -146089274, now seen corresponding path program 1 times [2023-09-01 00:31:27,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:31:27,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067340256] [2023-09-01 00:31:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:31:27,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:31:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:31:27,433 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:31:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:31:27,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:31:27,464 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:31:27,464 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:31:27,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 00:31:27,469 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:31:27,469 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:31:27,469 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:31:27,470 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 00:31:27,522 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-09-01 00:31:27,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 432 places, 506 transitions, 1306 flow