./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.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 TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --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 TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:07:00,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:07:00,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:07:00,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:07:00,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:07:00,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:07:00,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:07:00,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:07:00,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:07:00,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:07:00,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:07:00,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:07:00,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:07:00,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:07:00,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:07:00,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:07:00,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:07:00,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:07:00,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:07:00,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:07:00,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:07:00,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:07:00,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:07:00,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:07:00,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:07:00,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:07:00,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:07:00,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:07:00,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:07:00,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:07:00,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:07:00,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:07:00,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:07:00,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:07:00,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:07:00,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:07:00,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:07:00,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:07:00,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:07:00,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:07:00,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:07:00,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:07:00,514 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:07:00,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:07:00,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:07:00,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:07:00,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:07:00,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:07:00,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:07:00,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:07:00,518 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:07:00,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:07:00,519 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:07:00,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:07:00,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:07:00,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:07:00,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:07:00,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:07:00,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:07:00,520 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:07:00,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:07:00,521 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:07:00,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:07:00,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:07:00,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:07:00,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:07:00,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:07:00,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:07:00,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:07:00,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:07:00,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:07:00,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:07:00,523 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:07:00,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:07:00,523 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:07:00,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:07:00,524 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:07:00,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:07:00,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:07:00,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:07:00,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:07:00,906 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:07:00,907 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:07:00,909 INFO L432 ainManager$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 [2023-08-31 00:07:02,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:07:02,452 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:07:02,453 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-08-31 00:07:02,462 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1c279298/f0b657d1664a4865b83d2126a3213569/FLAGf99ce58a2 [2023-08-31 00:07:02,474 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1c279298/f0b657d1664a4865b83d2126a3213569 [2023-08-31 00:07:02,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:07:02,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:07:02,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:07:02,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:07:02,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:07:02,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:02,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4a2c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02, skipping insertion in model container [2023-08-31 00:07:02,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:02,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:07:02,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:07:02,825 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] [2023-08-31 00:07:02,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:07:02,865 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:07:02,909 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] [2023-08-31 00:07:02,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:07:02,978 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:07:02,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02 WrapperNode [2023-08-31 00:07:02,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:07:02,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:07:02,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:07:02,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:07:02,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,044 INFO L138 Inliner]: procedures = 170, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-08-31 00:07:03,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:07:03,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:07:03,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:07:03,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:07:03,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,089 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:07:03,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:07:03,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:07:03,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:07:03,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (1/1) ... [2023-08-31 00:07:03,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:07:03,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:07:03,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:07:03,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:07:03,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:07:03,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:07:03,173 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:07:03,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:07:03,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:07:03,173 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:07:03,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:07:03,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:07:03,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:07:03,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:07:03,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:07:03,175 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:07:03,284 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:07:03,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:07:03,458 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:07:03,465 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:07:03,465 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-31 00:07:03,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:07:03 BoogieIcfgContainer [2023-08-31 00:07:03,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:07:03,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:07:03,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:07:03,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:07:03,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:07:02" (1/3) ... [2023-08-31 00:07:03,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe9126a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:07:03, skipping insertion in model container [2023-08-31 00:07:03,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:07:02" (2/3) ... [2023-08-31 00:07:03,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe9126a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:07:03, skipping insertion in model container [2023-08-31 00:07:03,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:07:03" (3/3) ... [2023-08-31 00:07:03,474 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2023-08-31 00:07:03,481 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:07:03,490 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:07:03,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:07:03,491 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:07:03,568 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:07:03,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 108 transitions, 224 flow [2023-08-31 00:07:03,689 INFO L130 PetriNetUnfolder]: 17/141 cut-off events. [2023-08-31 00:07:03,692 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:07:03,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 141 events. 17/141 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 302 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-31 00:07:03,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 108 transitions, 224 flow [2023-08-31 00:07:03,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 103 transitions, 211 flow [2023-08-31 00:07:03,710 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:07:03,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 103 transitions, 211 flow [2023-08-31 00:07:03,741 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 103 transitions, 211 flow [2023-08-31 00:07:03,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 103 transitions, 211 flow [2023-08-31 00:07:03,795 INFO L130 PetriNetUnfolder]: 16/136 cut-off events. [2023-08-31 00:07:03,796 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:07:03,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 136 events. 16/136 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 287 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-31 00:07:03,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-31 00:07:06,522 INFO L134 LiptonReduction]: Checked pairs total: 3620 [2023-08-31 00:07:06,522 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-31 00:07:06,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:07:06,540 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5d4d48dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:07:06,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:07:06,544 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-08-31 00:07:06,545 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:07:06,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:06,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:07:06,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:06,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:06,551 INFO L85 PathProgramCache]: Analyzing trace with hash 12787872, now seen corresponding path program 1 times [2023-08-31 00:07:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:06,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785134236] [2023-08-31 00:07:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:06,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:06,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:07:06,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785134236] [2023-08-31 00:07:06,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785134236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:07:06,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:07:06,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:07:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454311867] [2023-08-31 00:07:06,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:07:06,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:07:06,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:07:06,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:07:06,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:07:06,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 196 [2023-08-31 00:07:06,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:06,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:07:06,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 196 [2023-08-31 00:07:06,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:07:06,921 INFO L130 PetriNetUnfolder]: 72/174 cut-off events. [2023-08-31 00:07:06,921 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:07:06,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 174 events. 72/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 687 event pairs, 0 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2023-08-31 00:07:06,924 INFO L137 encePairwiseOnDemand]: 184/196 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-08-31 00:07:06,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 121 flow [2023-08-31 00:07:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:07:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:07:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-08-31 00:07:06,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340136054421769 [2023-08-31 00:07:06,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-08-31 00:07:06,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-08-31 00:07:06,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:07:06,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-08-31 00:07:06,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:06,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:06,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:06,965 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 314 transitions. [2023-08-31 00:07:06,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 121 flow [2023-08-31 00:07:06,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:07:06,969 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 47 flow [2023-08-31 00:07:06,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-08-31 00:07:06,974 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-31 00:07:06,975 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 47 flow [2023-08-31 00:07:06,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:06,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:06,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:07:06,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:07:06,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:06,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash -601168239, now seen corresponding path program 1 times [2023-08-31 00:07:06,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:06,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301960657] [2023-08-31 00:07:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:06,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:07:07,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:07:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:07:07,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:07:07,064 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:07:07,066 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:07:07,068 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:07:07,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:07:07,073 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:07:07,075 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:07:07,075 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:07:07,102 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:07:07,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 138 transitions, 294 flow [2023-08-31 00:07:07,152 INFO L130 PetriNetUnfolder]: 31/228 cut-off events. [2023-08-31 00:07:07,152 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:07:07,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 228 events. 31/228 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-08-31 00:07:07,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 138 transitions, 294 flow [2023-08-31 00:07:07,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 138 transitions, 294 flow [2023-08-31 00:07:07,159 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:07:07,159 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 138 transitions, 294 flow [2023-08-31 00:07:07,159 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 138 transitions, 294 flow [2023-08-31 00:07:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 138 transitions, 294 flow [2023-08-31 00:07:07,192 INFO L130 PetriNetUnfolder]: 31/228 cut-off events. [2023-08-31 00:07:07,192 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:07:07,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 228 events. 31/228 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-08-31 00:07:07,200 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-31 00:07:09,744 INFO L134 LiptonReduction]: Checked pairs total: 17421 [2023-08-31 00:07:09,744 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-31 00:07:09,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:07:09,747 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5d4d48dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:07:09,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:07:09,749 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2023-08-31 00:07:09,749 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:07:09,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:09,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:07:09,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:09,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash 20949202, now seen corresponding path program 1 times [2023-08-31 00:07:09,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:09,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791113016] [2023-08-31 00:07:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:09,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:09,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:07:09,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791113016] [2023-08-31 00:07:09,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791113016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:07:09,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:07:09,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:07:09,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461028168] [2023-08-31 00:07:09,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:07:09,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:07:09,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:07:09,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:07:09,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:07:09,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 235 [2023-08-31 00:07:09,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:09,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:07:09,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 235 [2023-08-31 00:07:09,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:07:10,073 INFO L130 PetriNetUnfolder]: 1376/2456 cut-off events. [2023-08-31 00:07:10,073 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-31 00:07:10,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4780 conditions, 2456 events. 1376/2456 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14736 event pairs, 648 based on Foata normal form. 555/2693 useless extension candidates. Maximal degree in co-relation 639. Up to 2257 conditions per place. [2023-08-31 00:07:10,083 INFO L137 encePairwiseOnDemand]: 217/235 looper letters, 28 selfloop transitions, 2 changer transitions 10/50 dead transitions. [2023-08-31 00:07:10,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 196 flow [2023-08-31 00:07:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:07:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:07:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-31 00:07:10,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631205673758866 [2023-08-31 00:07:10,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-31 00:07:10,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-31 00:07:10,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:07:10,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-31 00:07:10,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:10,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:10,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:10,090 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 397 transitions. [2023-08-31 00:07:10,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 196 flow [2023-08-31 00:07:10,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:07:10,092 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 88 flow [2023-08-31 00:07:10,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-08-31 00:07:10,093 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-31 00:07:10,094 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 88 flow [2023-08-31 00:07:10,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:10,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:10,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:07:10,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:07:10,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:10,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:10,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1477495966, now seen corresponding path program 1 times [2023-08-31 00:07:10,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:10,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194947421] [2023-08-31 00:07:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:10,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:10,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:07:10,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194947421] [2023-08-31 00:07:10,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194947421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:07:10,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355340815] [2023-08-31 00:07:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:10,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:07:10,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:07:10,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:07:10,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:07:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:10,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:07:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:07:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:10,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:07:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355340815] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:07:10,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:07:10,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:07:10,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320197140] [2023-08-31 00:07:10,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:07:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:07:10,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:07:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:07:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:07:10,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 235 [2023-08-31 00:07:10,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 113.28571428571429) internal successors, (793), 7 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:10,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:07:10,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 235 [2023-08-31 00:07:10,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:07:10,527 INFO L130 PetriNetUnfolder]: 286/565 cut-off events. [2023-08-31 00:07:10,527 INFO L131 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2023-08-31 00:07:10,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 565 events. 286/565 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2711 event pairs, 99 based on Foata normal form. 70/632 useless extension candidates. Maximal degree in co-relation 974. Up to 346 conditions per place. [2023-08-31 00:07:10,530 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-31 00:07:10,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 208 flow [2023-08-31 00:07:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:07:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:07:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 599 transitions. [2023-08-31 00:07:10,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097872340425532 [2023-08-31 00:07:10,533 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 599 transitions. [2023-08-31 00:07:10,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 599 transitions. [2023-08-31 00:07:10,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:07:10,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 599 transitions. [2023-08-31 00:07:10,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:10,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:10,538 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:10,538 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 88 flow. Second operand 5 states and 599 transitions. [2023-08-31 00:07:10,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 208 flow [2023-08-31 00:07:10,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:07:10,541 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-31 00:07:10,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-31 00:07:10,542 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-08-31 00:07:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-31 00:07:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.28571428571429) internal successors, (793), 7 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:10,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:10,543 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:07:10,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:07:10,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:07:10,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:10,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1661799328, now seen corresponding path program 1 times [2023-08-31 00:07:10,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:10,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457939139] [2023-08-31 00:07:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:07:10,769 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:07:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:07:10,798 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:07:10,798 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:07:10,798 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:07:10,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:07:10,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:07:10,799 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:07:10,799 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:07:10,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:07:10,847 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:07:10,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 168 transitions, 366 flow [2023-08-31 00:07:10,902 INFO L130 PetriNetUnfolder]: 50/346 cut-off events. [2023-08-31 00:07:10,902 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:07:10,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 346 events. 50/346 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1041 event pairs, 1 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 236. Up to 16 conditions per place. [2023-08-31 00:07:10,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 168 transitions, 366 flow [2023-08-31 00:07:10,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 168 transitions, 366 flow [2023-08-31 00:07:10,908 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:07:10,908 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 168 transitions, 366 flow [2023-08-31 00:07:10,908 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 168 transitions, 366 flow [2023-08-31 00:07:10,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 168 transitions, 366 flow [2023-08-31 00:07:10,940 INFO L130 PetriNetUnfolder]: 50/346 cut-off events. [2023-08-31 00:07:10,940 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:07:10,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 346 events. 50/346 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1041 event pairs, 1 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 236. Up to 16 conditions per place. [2023-08-31 00:07:10,953 INFO L119 LiptonReduction]: Number of co-enabled transitions 12432 [2023-08-31 00:07:13,668 INFO L134 LiptonReduction]: Checked pairs total: 36170 [2023-08-31 00:07:13,669 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-31 00:07:13,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:07:13,672 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5d4d48dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:07:13,672 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:07:13,674 INFO L130 PetriNetUnfolder]: 1/8 cut-off events. [2023-08-31 00:07:13,674 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:07:13,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:13,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:07:13,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:13,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash 30581365, now seen corresponding path program 1 times [2023-08-31 00:07:13,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:13,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498270172] [2023-08-31 00:07:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:13,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:13,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:07:13,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498270172] [2023-08-31 00:07:13,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498270172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:07:13,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:07:13,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:07:13,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231742957] [2023-08-31 00:07:13,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:07:13,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:07:13,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:07:13,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:07:13,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:07:13,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 283 [2023-08-31 00:07:13,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:13,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:07:13,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 283 [2023-08-31 00:07:13,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:07:16,560 INFO L130 PetriNetUnfolder]: 23815/35886 cut-off events. [2023-08-31 00:07:16,561 INFO L131 PetriNetUnfolder]: For 1071/1071 co-relation queries the response was YES. [2023-08-31 00:07:16,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70265 conditions, 35886 events. 23815/35886 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 248394 event pairs, 15337 based on Foata normal form. 7136/40059 useless extension candidates. Maximal degree in co-relation 5685. Up to 33630 conditions per place. [2023-08-31 00:07:16,730 INFO L137 encePairwiseOnDemand]: 260/283 looper letters, 41 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-08-31 00:07:16,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 262 flow [2023-08-31 00:07:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:07:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:07:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-31 00:07:16,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665488810365136 [2023-08-31 00:07:16,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-31 00:07:16,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-31 00:07:16,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:07:16,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-31 00:07:16,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:16,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:16,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:16,737 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 481 transitions. [2023-08-31 00:07:16,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 262 flow [2023-08-31 00:07:16,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:07:16,740 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2023-08-31 00:07:16,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-31 00:07:16,741 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-31 00:07:16,741 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2023-08-31 00:07:16,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:16,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:16,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:07:16,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:07:16,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:16,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:16,743 INFO L85 PathProgramCache]: Analyzing trace with hash -852539858, now seen corresponding path program 1 times [2023-08-31 00:07:16,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:16,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135270935] [2023-08-31 00:07:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:16,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:16,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:07:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135270935] [2023-08-31 00:07:16,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135270935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:07:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936150068] [2023-08-31 00:07:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:16,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:07:16,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:07:16,781 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:07:16,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:07:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:07:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:07:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:16,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:07:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:16,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936150068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:07:16,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:07:16,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:07:16,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649976867] [2023-08-31 00:07:16,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:07:16,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:07:16,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:07:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:07:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:07:16,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 283 [2023-08-31 00:07:16,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:16,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:07:16,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 283 [2023-08-31 00:07:16,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:07:17,634 INFO L130 PetriNetUnfolder]: 5560/9097 cut-off events. [2023-08-31 00:07:17,634 INFO L131 PetriNetUnfolder]: For 3277/3277 co-relation queries the response was YES. [2023-08-31 00:07:17,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20492 conditions, 9097 events. 5560/9097 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 60541 event pairs, 70 based on Foata normal form. 819/9914 useless extension candidates. Maximal degree in co-relation 18091. Up to 5346 conditions per place. [2023-08-31 00:07:17,700 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 79 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-08-31 00:07:17,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 385 flow [2023-08-31 00:07:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:07:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:07:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 884 transitions. [2023-08-31 00:07:17,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5206124852767963 [2023-08-31 00:07:17,708 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 884 transitions. [2023-08-31 00:07:17,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 884 transitions. [2023-08-31 00:07:17,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:07:17,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 884 transitions. [2023-08-31 00:07:17,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.33333333333334) internal successors, (884), 6 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:17,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:17,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:17,720 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 884 transitions. [2023-08-31 00:07:17,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 385 flow [2023-08-31 00:07:17,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 377 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 00:07:17,736 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-31 00:07:17,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-31 00:07:17,738 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-08-31 00:07:17,740 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-31 00:07:17,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:17,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:17,741 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 00:07:17,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 00:07:17,950 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,SelfDestructingSolverStorable6 [2023-08-31 00:07:17,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:17,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:17,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2088555563, now seen corresponding path program 1 times [2023-08-31 00:07:17,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:17,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417464045] [2023-08-31 00:07:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:17,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:07:17,979 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:07:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:07:18,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:07:18,009 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:07:18,009 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:07:18,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:07:18,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 00:07:18,010 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:07:18,011 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:07:18,011 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:07:18,042 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:07:18,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 198 transitions, 440 flow [2023-08-31 00:07:18,110 INFO L130 PetriNetUnfolder]: 81/528 cut-off events. [2023-08-31 00:07:18,111 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:07:18,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 528 events. 81/528 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1873 event pairs, 6 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 366. Up to 32 conditions per place. [2023-08-31 00:07:18,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 198 transitions, 440 flow [2023-08-31 00:07:18,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 198 transitions, 440 flow [2023-08-31 00:07:18,123 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:07:18,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 198 transitions, 440 flow [2023-08-31 00:07:18,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 198 transitions, 440 flow [2023-08-31 00:07:18,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 198 transitions, 440 flow [2023-08-31 00:07:18,213 INFO L130 PetriNetUnfolder]: 81/528 cut-off events. [2023-08-31 00:07:18,213 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:07:18,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 528 events. 81/528 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1873 event pairs, 6 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 366. Up to 32 conditions per place. [2023-08-31 00:07:18,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 20048 [2023-08-31 00:07:20,721 INFO L134 LiptonReduction]: Checked pairs total: 56129 [2023-08-31 00:07:20,722 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-31 00:07:20,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:07:20,724 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5d4d48dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:07:20,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:07:20,725 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2023-08-31 00:07:20,725 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:07:20,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:20,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:07:20,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:20,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash 41511427, now seen corresponding path program 1 times [2023-08-31 00:07:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447209850] [2023-08-31 00:07:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:20,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:07:20,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447209850] [2023-08-31 00:07:20,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447209850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:07:20,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:07:20,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:07:20,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372439421] [2023-08-31 00:07:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:07:20,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:07:20,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:07:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:07:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:07:20,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 325 [2023-08-31 00:07:20,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:20,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:07:20,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 325 [2023-08-31 00:07:20,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:07:41,294 INFO L130 PetriNetUnfolder]: 230525/321293 cut-off events. [2023-08-31 00:07:41,294 INFO L131 PetriNetUnfolder]: For 12048/12048 co-relation queries the response was YES. [2023-08-31 00:07:41,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629779 conditions, 321293 events. 230525/321293 cut-off events. For 12048/12048 co-relation queries the response was YES. Maximal size of possible extension queue 7349. Compared 2524457 event pairs, 187184 based on Foata normal form. 60142/356184 useless extension candidates. Maximal degree in co-relation 60884. Up to 301798 conditions per place. [2023-08-31 00:07:42,431 INFO L137 encePairwiseOnDemand]: 295/325 looper letters, 46 selfloop transitions, 2 changer transitions 12/77 dead transitions. [2023-08-31 00:07:42,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 316 flow [2023-08-31 00:07:42,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:07:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:07:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-31 00:07:42,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753846153846154 [2023-08-31 00:07:42,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-31 00:07:42,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-31 00:07:42,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:07:42,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-31 00:07:42,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:42,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:42,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:42,436 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 561 transitions. [2023-08-31 00:07:42,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 316 flow [2023-08-31 00:07:42,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:07:42,443 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 156 flow [2023-08-31 00:07:42,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-08-31 00:07:42,443 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-31 00:07:42,444 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 156 flow [2023-08-31 00:07:42,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:42,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:42,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:07:42,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 00:07:42,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:42,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash -431431528, now seen corresponding path program 1 times [2023-08-31 00:07:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:42,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007611028] [2023-08-31 00:07:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:42,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:42,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:07:42,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007611028] [2023-08-31 00:07:42,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007611028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:07:42,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572902858] [2023-08-31 00:07:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:42,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:07:42,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:07:42,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:07:42,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:07:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:42,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:07:42,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:07:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:42,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:07:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:42,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572902858] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:07:42,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:07:42,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-31 00:07:42,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889413165] [2023-08-31 00:07:42,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:07:42,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:07:42,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:07:42,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:07:42,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-31 00:07:42,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 325 [2023-08-31 00:07:42,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:42,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:07:42,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 325 [2023-08-31 00:07:42,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:07:50,404 INFO L130 PetriNetUnfolder]: 96934/133280 cut-off events. [2023-08-31 00:07:50,405 INFO L131 PetriNetUnfolder]: For 18346/18346 co-relation queries the response was YES. [2023-08-31 00:07:50,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276371 conditions, 133280 events. 96934/133280 cut-off events. For 18346/18346 co-relation queries the response was YES. Maximal size of possible extension queue 3558. Compared 956040 event pairs, 11714 based on Foata normal form. 584/133838 useless extension candidates. Maximal degree in co-relation 99020. Up to 83201 conditions per place. [2023-08-31 00:07:51,147 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 111 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-08-31 00:07:51,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 134 transitions, 548 flow [2023-08-31 00:07:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:07:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:07:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1050 transitions. [2023-08-31 00:07:51,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-08-31 00:07:51,150 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1050 transitions. [2023-08-31 00:07:51,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1050 transitions. [2023-08-31 00:07:51,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:07:51,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1050 transitions. [2023-08-31 00:07:51,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:51,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:51,156 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:51,156 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 156 flow. Second operand 6 states and 1050 transitions. [2023-08-31 00:07:51,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 134 transitions, 548 flow [2023-08-31 00:07:51,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 134 transitions, 534 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:07:51,181 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-31 00:07:51,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-31 00:07:51,182 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-31 00:07:51,182 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-31 00:07:51,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:51,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:51,183 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 00:07:51,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 00:07:51,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:07:51,388 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:51,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash 273609228, now seen corresponding path program 1 times [2023-08-31 00:07:51,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:51,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340564028] [2023-08-31 00:07:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:51,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:07:51,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:07:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:07:51,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:07:51,418 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:07:51,418 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:07:51,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:07:51,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:07:51,419 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:07:51,419 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:07:51,420 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 00:07:51,444 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 00:07:51,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 228 transitions, 516 flow [2023-08-31 00:07:51,539 INFO L130 PetriNetUnfolder]: 140/842 cut-off events. [2023-08-31 00:07:51,539 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:07:51,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 842 events. 140/842 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3587 event pairs, 23 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 573. Up to 80 conditions per place. [2023-08-31 00:07:51,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 228 transitions, 516 flow [2023-08-31 00:07:51,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 228 transitions, 516 flow [2023-08-31 00:07:51,557 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:07:51,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 228 transitions, 516 flow [2023-08-31 00:07:51,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 228 transitions, 516 flow [2023-08-31 00:07:51,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 228 transitions, 516 flow [2023-08-31 00:07:51,635 INFO L130 PetriNetUnfolder]: 140/842 cut-off events. [2023-08-31 00:07:51,635 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:07:51,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 842 events. 140/842 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3587 event pairs, 23 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 573. Up to 80 conditions per place. [2023-08-31 00:07:51,670 INFO L119 LiptonReduction]: Number of co-enabled transitions 29400 [2023-08-31 00:07:54,054 INFO L134 LiptonReduction]: Checked pairs total: 84497 [2023-08-31 00:07:54,055 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-08-31 00:07:54,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:07:54,057 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5d4d48dd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:07:54,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:07:54,058 INFO L130 PetriNetUnfolder]: 1/8 cut-off events. [2023-08-31 00:07:54,058 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:07:54,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:07:54,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:07:54,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:07:54,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:07:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash 53914925, now seen corresponding path program 1 times [2023-08-31 00:07:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:07:54,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424580207] [2023-08-31 00:07:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:07:54,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:07:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:07:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:07:54,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:07:54,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424580207] [2023-08-31 00:07:54,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424580207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:07:54,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:07:54,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:07:54,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024162788] [2023-08-31 00:07:54,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:07:54,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:07:54,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:07:54,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:07:54,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:07:54,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 373 [2023-08-31 00:07:54,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:07:54,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:07:54,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 373 [2023-08-31 00:07:54,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand