./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.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_86-lists_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --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 00:57:29,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:57:29,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:57:29,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:57:29,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:57:29,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:57:29,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:57:29,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:57:29,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:57:29,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:57:29,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:57:29,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:57:29,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:57:29,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:57:29,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:57:29,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:57:29,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:57:29,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:57:29,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:57:29,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:57:29,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:57:29,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:57:29,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:57:29,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:57:29,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:57:29,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:57:29,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:57:29,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:57:29,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:57:29,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:57:29,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:57:29,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:57:29,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:57:29,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:57:29,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:57:29,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:57:29,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:57:29,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:57:29,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:57:29,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:57:29,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:57:29,626 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:57:29,657 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:57:29,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:57:29,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:57:29,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:57:29,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:57:29,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:57:29,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:57:29,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:57:29,661 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:57:29,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:57:29,662 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:57:29,662 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:57:29,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:57:29,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:57:29,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:57:29,663 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:57:29,663 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:57:29,663 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:57:29,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:57:29,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:57:29,663 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:57:29,664 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:57:29,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:57:29,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:57:29,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:57:29,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:57:29,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:57:29,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:57:29,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:57:29,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:57:29,665 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:57:29,665 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:57:29,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:57:29,666 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:57:29,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:57:29,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:57:29,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:57:29,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:57:29,971 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:57:29,971 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:57:29,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-09-01 00:57:31,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:57:31,442 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:57:31,443 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-09-01 00:57:31,459 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18b0ccd8/4ea6eea0978849b4b03ed836553d6ccf/FLAG053c01e6e [2023-09-01 00:57:31,480 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18b0ccd8/4ea6eea0978849b4b03ed836553d6ccf [2023-09-01 00:57:31,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:57:31,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:57:31,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:57:31,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:57:31,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:57:31,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:57:31" (1/1) ... [2023-09-01 00:57:31,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@305ef1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:31, skipping insertion in model container [2023-09-01 00:57:31,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:57:31" (1/1) ... [2023-09-01 00:57:31,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:57:31,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:57:31,898 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_86-lists_racing.i[47038,47051] [2023-09-01 00:57:31,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:57:32,065 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:57:32,111 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_86-lists_racing.i[47038,47051] [2023-09-01 00:57:32,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:57:32,209 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:57:32,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32 WrapperNode [2023-09-01 00:57:32,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:57:32,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:57:32,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:57:32,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:57:32,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,289 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 232 [2023-09-01 00:57:32,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:57:32,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:57:32,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:57:32,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:57:32,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,345 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:57:32,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:57:32,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:57:32,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:57:32,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (1/1) ... [2023-09-01 00:57:32,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:57:32,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:57:32,385 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 00:57:32,414 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 00:57:32,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:57:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 00:57:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-09-01 00:57:32,429 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-09-01 00:57:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:57:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:57:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-09-01 00:57:32,430 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-09-01 00:57:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:57:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:57:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 00:57:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:57:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 00:57:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:57:32,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:57:32,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:57:32,432 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 00:57:32,635 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:57:32,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:57:33,067 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:57:33,076 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:57:33,078 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 00:57:33,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:57:33 BoogieIcfgContainer [2023-09-01 00:57:33,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:57:33,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:57:33,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:57:33,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:57:33,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:57:31" (1/3) ... [2023-09-01 00:57:33,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2121e42b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:57:33, skipping insertion in model container [2023-09-01 00:57:33,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:32" (2/3) ... [2023-09-01 00:57:33,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2121e42b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:57:33, skipping insertion in model container [2023-09-01 00:57:33,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:57:33" (3/3) ... [2023-09-01 00:57:33,090 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-09-01 00:57:33,104 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:57:33,105 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-09-01 00:57:33,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:57:33,248 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:57:33,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 279 transitions, 580 flow [2023-09-01 00:57:33,460 INFO L130 PetriNetUnfolder]: 54/526 cut-off events. [2023-09-01 00:57:33,461 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-09-01 00:57:33,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 526 events. 54/526 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2427 event pairs, 0 based on Foata normal form. 0/380 useless extension candidates. Maximal degree in co-relation 258. Up to 8 conditions per place. [2023-09-01 00:57:33,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 279 transitions, 580 flow [2023-09-01 00:57:33,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 269 transitions, 554 flow [2023-09-01 00:57:33,479 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:57:33,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 269 transitions, 554 flow [2023-09-01 00:57:33,494 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 269 transitions, 554 flow [2023-09-01 00:57:33,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 269 transitions, 554 flow [2023-09-01 00:57:33,580 INFO L130 PetriNetUnfolder]: 50/504 cut-off events. [2023-09-01 00:57:33,580 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2023-09-01 00:57:33,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 504 events. 50/504 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2262 event pairs, 0 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-09-01 00:57:33,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 24638 [2023-09-01 00:57:40,686 INFO L134 LiptonReduction]: Checked pairs total: 57274 [2023-09-01 00:57:40,689 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-09-01 00:57:40,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:57:40,707 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;@3f1f6220, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:57:40,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-09-01 00:57:40,714 INFO L130 PetriNetUnfolder]: 1/43 cut-off events. [2023-09-01 00:57:40,714 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:57:40,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:57:40,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 00:57:40,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:57:40,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:57:40,720 INFO L85 PathProgramCache]: Analyzing trace with hash 350307521, now seen corresponding path program 1 times [2023-09-01 00:57:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:57:40,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599864850] [2023-09-01 00:57:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:57:40,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:57:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:57:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:57:40,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:57:40,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599864850] [2023-09-01 00:57:40,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599864850] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:57:40,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:57:40,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:57:40,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900872758] [2023-09-01 00:57:40,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:57:41,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:57:41,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:57:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:57:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:57:41,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 508 [2023-09-01 00:57:41,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 102 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:41,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:57:41,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 508 [2023-09-01 00:57:41,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:57:43,956 INFO L130 PetriNetUnfolder]: 18591/31522 cut-off events. [2023-09-01 00:57:43,956 INFO L131 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2023-09-01 00:57:44,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60042 conditions, 31522 events. 18591/31522 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 245247 event pairs, 17876 based on Foata normal form. 1304/16652 useless extension candidates. Maximal degree in co-relation 57292. Up to 28408 conditions per place. [2023-09-01 00:57:44,048 INFO L137 encePairwiseOnDemand]: 494/508 looper letters, 58 selfloop transitions, 2 changer transitions 16/92 dead transitions. [2023-09-01 00:57:44,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 352 flow [2023-09-01 00:57:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:57:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:57:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-09-01 00:57:44,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518372703412073 [2023-09-01 00:57:44,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-09-01 00:57:44,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-09-01 00:57:44,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:57:44,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-09-01 00:57:44,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:44,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:44,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:44,090 INFO L175 Difference]: Start difference. First operand has 91 places, 102 transitions, 220 flow. Second operand 3 states and 841 transitions. [2023-09-01 00:57:44,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 352 flow [2023-09-01 00:57:44,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:57:44,110 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 172 flow [2023-09-01 00:57:44,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2023-09-01 00:57:44,114 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 3 predicate places. [2023-09-01 00:57:44,115 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 172 flow [2023-09-01 00:57:44,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:44,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:57:44,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:57:44,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:57:44,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:57:44,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:57:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2128024024, now seen corresponding path program 1 times [2023-09-01 00:57:44,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:57:44,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549341020] [2023-09-01 00:57:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:57:44,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:57:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:57:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:57:44,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:57:44,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549341020] [2023-09-01 00:57:44,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549341020] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:57:44,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330334873] [2023-09-01 00:57:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:57:44,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:57:44,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:57:44,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:57:44,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 00:57:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:57:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:57:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:57:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:57:44,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:57:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:57:44,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330334873] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:57:44,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:57:44,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:57:44,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56285171] [2023-09-01 00:57:44,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:57:44,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:57:44,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:57:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:57:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:57:44,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 508 [2023-09-01 00:57:44,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 251.57142857142858) internal successors, (1761), 7 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:44,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:57:44,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 508 [2023-09-01 00:57:44,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:57:45,599 INFO L130 PetriNetUnfolder]: 5819/10169 cut-off events. [2023-09-01 00:57:45,600 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 00:57:45,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19328 conditions, 10169 events. 5819/10169 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 68699 event pairs, 5602 based on Foata normal form. 0/4937 useless extension candidates. Maximal degree in co-relation 19315. Up to 9096 conditions per place. [2023-09-01 00:57:45,631 INFO L137 encePairwiseOnDemand]: 505/508 looper letters, 58 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-09-01 00:57:45,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 310 flow [2023-09-01 00:57:45,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:57:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:57:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1566 transitions. [2023-09-01 00:57:45,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137795275590551 [2023-09-01 00:57:45,635 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1566 transitions. [2023-09-01 00:57:45,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1566 transitions. [2023-09-01 00:57:45,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:57:45,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1566 transitions. [2023-09-01 00:57:45,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:45,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:45,646 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:45,647 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 172 flow. Second operand 6 states and 1566 transitions. [2023-09-01 00:57:45,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 310 flow [2023-09-01 00:57:45,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 306 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 00:57:45,651 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 204 flow [2023-09-01 00:57:45,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2023-09-01 00:57:45,652 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -4 predicate places. [2023-09-01 00:57:45,652 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 204 flow [2023-09-01 00:57:45,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 251.57142857142858) internal successors, (1761), 7 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:45,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:57:45,653 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 00:57:45,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 00:57:45,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:57:45,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:57:45,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:57:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1103894911, now seen corresponding path program 2 times [2023-09-01 00:57:45,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:57:45,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748222789] [2023-09-01 00:57:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:57:45,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:57:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:57:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:57:46,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:57:46,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748222789] [2023-09-01 00:57:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748222789] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:57:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697196749] [2023-09-01 00:57:46,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:57:46,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:57:46,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:57:46,029 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:57:46,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 00:57:46,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:57:46,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:57:46,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:57:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:57:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:57:46,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:57:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:57:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697196749] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:57:46,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:57:46,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:57:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924507190] [2023-09-01 00:57:46,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:57:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:57:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:57:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:57:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:57:46,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 508 [2023-09-01 00:57:46,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 204 flow. Second operand has 13 states, 13 states have (on average 251.30769230769232) internal successors, (3267), 13 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:46,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:57:46,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 508 [2023-09-01 00:57:46,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:57:47,221 INFO L130 PetriNetUnfolder]: 5819/10175 cut-off events. [2023-09-01 00:57:47,221 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-09-01 00:57:47,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19365 conditions, 10175 events. 5819/10175 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 68700 event pairs, 5602 based on Foata normal form. 6/4950 useless extension candidates. Maximal degree in co-relation 19306. Up to 9096 conditions per place. [2023-09-01 00:57:47,253 INFO L137 encePairwiseOnDemand]: 505/508 looper letters, 58 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2023-09-01 00:57:47,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 85 transitions, 378 flow [2023-09-01 00:57:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:57:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:57:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3075 transitions. [2023-09-01 00:57:47,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044291338582677 [2023-09-01 00:57:47,261 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3075 transitions. [2023-09-01 00:57:47,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3075 transitions. [2023-09-01 00:57:47,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:57:47,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3075 transitions. [2023-09-01 00:57:47,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 256.25) internal successors, (3075), 12 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:47,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 508.0) internal successors, (6604), 13 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:47,283 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 508.0) internal successors, (6604), 13 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:47,283 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 204 flow. Second operand 12 states and 3075 transitions. [2023-09-01 00:57:47,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 85 transitions, 378 flow [2023-09-01 00:57:47,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 85 transitions, 364 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:57:47,288 INFO L231 Difference]: Finished difference. Result has 103 places, 85 transitions, 274 flow [2023-09-01 00:57:47,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=274, PETRI_PLACES=103, PETRI_TRANSITIONS=85} [2023-09-01 00:57:47,290 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 12 predicate places. [2023-09-01 00:57:47,290 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 85 transitions, 274 flow [2023-09-01 00:57:47,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 251.30769230769232) internal successors, (3267), 13 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:57:47,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:57:47,293 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 00:57:47,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 00:57:47,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 00:57:47,500 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:57:47,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:57:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1731594975, now seen corresponding path program 3 times [2023-09-01 00:57:47,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:57:47,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864883315] [2023-09-01 00:57:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:57:47,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:57:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:57:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:57:47,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:57:47,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864883315] [2023-09-01 00:57:47,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864883315] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:57:47,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373530056] [2023-09-01 00:57:47,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 00:57:47,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:57:47,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:57:47,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:57:47,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 01:00:19,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:00:19,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:00:19,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:00:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:00:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:19,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:00:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:20,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373530056] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:00:20,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:00:20,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-09-01 01:00:20,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762115650] [2023-09-01 01:00:20,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:00:20,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 01:00:20,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:00:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 01:00:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 01:00:20,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 508 [2023-09-01 01:00:20,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 85 transitions, 274 flow. Second operand has 25 states, 25 states have (on average 251.16) internal successors, (6279), 25 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:20,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:00:20,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 508 [2023-09-01 01:00:20,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:00:21,519 INFO L130 PetriNetUnfolder]: 5819/10187 cut-off events. [2023-09-01 01:00:21,519 INFO L131 PetriNetUnfolder]: For 478/478 co-relation queries the response was YES. [2023-09-01 01:00:21,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19449 conditions, 10187 events. 5819/10187 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 68665 event pairs, 5602 based on Foata normal form. 12/4968 useless extension candidates. Maximal degree in co-relation 19312. Up to 9096 conditions per place. [2023-09-01 01:00:21,562 INFO L137 encePairwiseOnDemand]: 505/508 looper letters, 58 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2023-09-01 01:00:21,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 97 transitions, 532 flow [2023-09-01 01:00:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 01:00:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 01:00:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 6093 transitions. [2023-09-01 01:00:21,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.499753937007874 [2023-09-01 01:00:21,581 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 6093 transitions. [2023-09-01 01:00:21,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 6093 transitions. [2023-09-01 01:00:21,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:00:21,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 6093 transitions. [2023-09-01 01:00:21,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 253.875) internal successors, (6093), 24 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:21,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 508.0) internal successors, (12700), 25 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:21,622 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 508.0) internal successors, (12700), 25 states have internal predecessors, (12700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:21,622 INFO L175 Difference]: Start difference. First operand has 103 places, 85 transitions, 274 flow. Second operand 24 states and 6093 transitions. [2023-09-01 01:00:21,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 97 transitions, 532 flow [2023-09-01 01:00:21,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 97 transitions, 460 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-09-01 01:00:21,628 INFO L231 Difference]: Finished difference. Result has 133 places, 97 transitions, 394 flow [2023-09-01 01:00:21,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=394, PETRI_PLACES=133, PETRI_TRANSITIONS=97} [2023-09-01 01:00:21,631 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 42 predicate places. [2023-09-01 01:00:21,631 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 97 transitions, 394 flow [2023-09-01 01:00:21,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 251.16) internal successors, (6279), 25 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:21,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:00:21,634 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2023-09-01 01:00:21,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 01:00:21,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:00:21,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 01:00:21,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:00:21,849 INFO L85 PathProgramCache]: Analyzing trace with hash 936880737, now seen corresponding path program 4 times [2023-09-01 01:00:21,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:00:21,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164858320] [2023-09-01 01:00:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:00:21,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:00:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:00:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:00:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164858320] [2023-09-01 01:00:23,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164858320] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:00:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258624558] [2023-09-01 01:00:23,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:00:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:00:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:00:23,161 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:00:23,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 01:00:23,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:00:23,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:00:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 01:00:23,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:00:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:23,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:00:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:24,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258624558] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:00:24,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:00:24,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-09-01 01:00:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716340804] [2023-09-01 01:00:24,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:00:24,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 01:00:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:00:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 01:00:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-09-01 01:00:24,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 508 [2023-09-01 01:00:24,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 97 transitions, 394 flow. Second operand has 49 states, 49 states have (on average 251.08163265306123) internal successors, (12303), 49 states have internal predecessors, (12303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:24,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:00:24,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 508 [2023-09-01 01:00:24,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:00:25,914 INFO L130 PetriNetUnfolder]: 5819/10211 cut-off events. [2023-09-01 01:00:25,915 INFO L131 PetriNetUnfolder]: For 5248/5248 co-relation queries the response was YES. [2023-09-01 01:00:25,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19593 conditions, 10211 events. 5819/10211 cut-off events. For 5248/5248 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 68660 event pairs, 5602 based on Foata normal form. 24/5004 useless extension candidates. Maximal degree in co-relation 19324. Up to 9096 conditions per place. [2023-09-01 01:00:25,943 INFO L137 encePairwiseOnDemand]: 505/508 looper letters, 58 selfloop transitions, 47 changer transitions 0/121 dead transitions. [2023-09-01 01:00:25,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 121 transitions, 796 flow [2023-09-01 01:00:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 01:00:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 01:00:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 12129 transitions. [2023-09-01 01:00:25,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49741633858267714 [2023-09-01 01:00:25,968 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 12129 transitions. [2023-09-01 01:00:25,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 12129 transitions. [2023-09-01 01:00:25,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:00:25,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 12129 transitions. [2023-09-01 01:00:25,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 252.6875) internal successors, (12129), 48 states have internal predecessors, (12129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:26,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 508.0) internal successors, (24892), 49 states have internal predecessors, (24892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:26,031 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 508.0) internal successors, (24892), 49 states have internal predecessors, (24892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:26,031 INFO L175 Difference]: Start difference. First operand has 133 places, 97 transitions, 394 flow. Second operand 48 states and 12129 transitions. [2023-09-01 01:00:26,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 121 transitions, 796 flow [2023-09-01 01:00:26,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 121 transitions, 652 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-09-01 01:00:26,044 INFO L231 Difference]: Finished difference. Result has 193 places, 121 transitions, 634 flow [2023-09-01 01:00:26,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=634, PETRI_PLACES=193, PETRI_TRANSITIONS=121} [2023-09-01 01:00:26,047 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 102 predicate places. [2023-09-01 01:00:26,047 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 121 transitions, 634 flow [2023-09-01 01:00:26,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 251.08163265306123) internal successors, (12303), 49 states have internal predecessors, (12303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:00:26,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:00:26,050 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2023-09-01 01:00:26,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:00:26,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:00:26,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 01:00:26,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:00:26,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1437502239, now seen corresponding path program 5 times [2023-09-01 01:00:26,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:00:26,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223921546] [2023-09-01 01:00:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:00:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:00:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:00:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:29,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:00:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223921546] [2023-09-01 01:00:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223921546] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:00:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766199404] [2023-09-01 01:00:29,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:00:29,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:00:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:00:29,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:00:29,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15