./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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_61-invariant_racing.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 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 17:57:01,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:57:01,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:57:01,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:57:01,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:57:01,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:57:01,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:57:01,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:57:01,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:57:01,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:57:01,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:57:01,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:57:01,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:57:01,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:57:01,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:57:01,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:57:01,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:57:01,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:57:01,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:57:01,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:57:01,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:57:01,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:57:01,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:57:01,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:57:01,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:57:01,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:57:01,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:57:01,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:57:01,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:57:01,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:57:01,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:57:01,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:57:01,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:57:01,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:57:01,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:57:01,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:57:01,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:57:01,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:57:01,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:57:01,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:57:01,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:57:01,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:57:01,524 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:57:01,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:57:01,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:57:01,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:57:01,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:57:01,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:57:01,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:57:01,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:57:01,527 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:57:01,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:57:01,528 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:57:01,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:57:01,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:57:01,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:57:01,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:57:01,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:57:01,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:57:01,529 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:57:01,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:57:01,529 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:57:01,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:57:01,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:57:01,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:57:01,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:57:01,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:57:01,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:57:01,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:57:01,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:57:01,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:57:01,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:57:01,531 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:57:01,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:57:01,531 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:57:01,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:57:01,531 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:57:01,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:57:01,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:57:01,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:57:01,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:57:01,798 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:57:01,798 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:57:01,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-08-30 17:57:02,824 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:57:03,007 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:57:03,009 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-08-30 17:57:03,019 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f977faac6/777bdcefd42043049ff3e82789c1c9b5/FLAGca51fd16f [2023-08-30 17:57:03,029 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f977faac6/777bdcefd42043049ff3e82789c1c9b5 [2023-08-30 17:57:03,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:57:03,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:57:03,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:57:03,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:57:03,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:57:03,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9fec1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03, skipping insertion in model container [2023-08-30 17:57:03,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:57:03,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:57:03,232 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_61-invariant_racing.i[30176,30189] [2023-08-30 17:57:03,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:57:03,259 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:57:03,287 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_61-invariant_racing.i[30176,30189] [2023-08-30 17:57:03,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:57:03,319 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:57:03,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03 WrapperNode [2023-08-30 17:57:03,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:57:03,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:57:03,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:57:03,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:57:03,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,374 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2023-08-30 17:57:03,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:57:03,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:57:03,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:57:03,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:57:03,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,410 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:57:03,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:57:03,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:57:03,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:57:03,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (1/1) ... [2023-08-30 17:57:03,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:57:03,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:03,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 17:57:03,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 17:57:03,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:57:03,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:57:03,469 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:57:03,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:57:03,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:57:03,470 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:57:03,470 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:57:03,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:57:03,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:57:03,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:57:03,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:57:03,471 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 17:57:03,611 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:57:03,612 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:57:03,795 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:57:03,799 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:57:03,801 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-30 17:57:03,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:57:03 BoogieIcfgContainer [2023-08-30 17:57:03,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:57:03,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:57:03,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:57:03,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:57:03,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:57:03" (1/3) ... [2023-08-30 17:57:03,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114f4b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:57:03, skipping insertion in model container [2023-08-30 17:57:03,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:57:03" (2/3) ... [2023-08-30 17:57:03,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114f4b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:57:03, skipping insertion in model container [2023-08-30 17:57:03,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:57:03" (3/3) ... [2023-08-30 17:57:03,809 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-08-30 17:57:03,814 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:57:03,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:57:03,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:57:03,833 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:57:03,886 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:57:03,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 124 transitions, 256 flow [2023-08-30 17:57:03,980 INFO L130 PetriNetUnfolder]: 30/179 cut-off events. [2023-08-30 17:57:03,980 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:57:03,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 179 events. 30/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 522 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-08-30 17:57:03,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 124 transitions, 256 flow [2023-08-30 17:57:03,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 119 transitions, 243 flow [2023-08-30 17:57:03,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:57:04,008 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 119 transitions, 243 flow [2023-08-30 17:57:04,011 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 119 transitions, 243 flow [2023-08-30 17:57:04,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 119 transitions, 243 flow [2023-08-30 17:57:04,051 INFO L130 PetriNetUnfolder]: 29/174 cut-off events. [2023-08-30 17:57:04,054 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:04,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 174 events. 29/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 512 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-08-30 17:57:04,057 INFO L119 LiptonReduction]: Number of co-enabled transitions 3782 [2023-08-30 17:57:05,873 INFO L134 LiptonReduction]: Checked pairs total: 9323 [2023-08-30 17:57:05,873 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-30 17:57:05,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:57:05,887 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;@2ee1c0cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:57:05,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:57:05,890 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2023-08-30 17:57:05,890 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:05,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:05,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:57:05,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:57:05,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:05,894 INFO L85 PathProgramCache]: Analyzing trace with hash 449238078, now seen corresponding path program 1 times [2023-08-30 17:57:05,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:05,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510115962] [2023-08-30 17:57:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:05,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:06,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510115962] [2023-08-30 17:57:06,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510115962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:57:06,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:57:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:57:06,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486221154] [2023-08-30 17:57:06,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:57:06,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:57:06,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:57:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:57:06,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 210 [2023-08-30 17:57:06,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 52 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:06,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:06,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 210 [2023-08-30 17:57:06,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:06,203 INFO L130 PetriNetUnfolder]: 141/350 cut-off events. [2023-08-30 17:57:06,204 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:06,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 350 events. 141/350 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1471 event pairs, 65 based on Foata normal form. 53/364 useless extension candidates. Maximal degree in co-relation 631. Up to 281 conditions per place. [2023-08-30 17:57:06,209 INFO L137 encePairwiseOnDemand]: 192/210 looper letters, 30 selfloop transitions, 2 changer transitions 6/48 dead transitions. [2023-08-30 17:57:06,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 175 flow [2023-08-30 17:57:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:57:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:57:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-30 17:57:06,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698412698412698 [2023-08-30 17:57:06,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-30 17:57:06,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-30 17:57:06,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:06,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-30 17:57:06,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:06,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:06,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:06,246 INFO L175 Difference]: Start difference. First operand has 40 places, 52 transitions, 109 flow. Second operand 3 states and 359 transitions. [2023-08-30 17:57:06,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 175 flow [2023-08-30 17:57:06,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 175 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:57:06,250 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 75 flow [2023-08-30 17:57:06,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-30 17:57:06,253 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-30 17:57:06,254 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 75 flow [2023-08-30 17:57:06,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:06,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:06,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:57:06,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:57:06,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:57:06,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:06,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1362181175, now seen corresponding path program 1 times [2023-08-30 17:57:06,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:06,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097273763] [2023-08-30 17:57:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:06,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:06,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097273763] [2023-08-30 17:57:06,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097273763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:57:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058192419] [2023-08-30 17:57:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:06,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:06,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:06,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:57:06,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 17:57:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:06,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:57:06,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:57:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:06,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:57:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058192419] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:57:06,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:57:06,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:57:06,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248732347] [2023-08-30 17:57:06,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:57:06,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:57:06,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:06,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:57:06,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:57:06,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 210 [2023-08-30 17:57:06,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 75 flow. Second operand has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:06,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:06,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 210 [2023-08-30 17:57:06,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:06,569 INFO L130 PetriNetUnfolder]: 21/58 cut-off events. [2023-08-30 17:57:06,569 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 17:57:06,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 58 events. 21/58 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 119 event pairs, 0 based on Foata normal form. 10/64 useless extension candidates. Maximal degree in co-relation 125. Up to 40 conditions per place. [2023-08-30 17:57:06,570 INFO L137 encePairwiseOnDemand]: 207/210 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-30 17:57:06,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 119 flow [2023-08-30 17:57:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:57:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:57:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 422 transitions. [2023-08-30 17:57:06,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023809523809524 [2023-08-30 17:57:06,572 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 422 transitions. [2023-08-30 17:57:06,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 422 transitions. [2023-08-30 17:57:06,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:06,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 422 transitions. [2023-08-30 17:57:06,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:06,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 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) [2023-08-30 17:57:06,577 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 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) [2023-08-30 17:57:06,577 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 75 flow. Second operand 4 states and 422 transitions. [2023-08-30 17:57:06,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 119 flow [2023-08-30 17:57:06,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 113 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:57:06,578 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-08-30 17:57:06,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-08-30 17:57:06,579 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -16 predicate places. [2023-08-30 17:57:06,579 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-08-30 17:57:06,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:06,581 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:57:06,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 17:57:06,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:06,784 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:57:06,786 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:57:06,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 124 transitions, 256 flow [2023-08-30 17:57:06,807 INFO L130 PetriNetUnfolder]: 30/179 cut-off events. [2023-08-30 17:57:06,808 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:57:06,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 179 events. 30/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 522 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-08-30 17:57:06,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 124 transitions, 256 flow [2023-08-30 17:57:06,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 119 transitions, 243 flow [2023-08-30 17:57:06,809 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:57:06,809 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 119 transitions, 243 flow [2023-08-30 17:57:06,809 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 119 transitions, 243 flow [2023-08-30 17:57:06,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 119 transitions, 243 flow [2023-08-30 17:57:06,817 INFO L130 PetriNetUnfolder]: 29/174 cut-off events. [2023-08-30 17:57:06,817 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:06,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 174 events. 29/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 512 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-08-30 17:57:06,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 3782 [2023-08-30 17:57:08,250 INFO L134 LiptonReduction]: Checked pairs total: 10881 [2023-08-30 17:57:08,250 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-30 17:57:08,252 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:57:08,252 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;@2ee1c0cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:57:08,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:57:08,255 INFO L130 PetriNetUnfolder]: 8/39 cut-off events. [2023-08-30 17:57:08,255 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:08,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:08,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:57:08,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:57:08,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash -788287719, now seen corresponding path program 1 times [2023-08-30 17:57:08,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:08,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615708195] [2023-08-30 17:57:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:57:08,282 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:57:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:57:08,303 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:57:08,303 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:57:08,303 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:57:08,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:57:08,303 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:57:08,304 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:57:08,304 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:57:08,304 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:57:08,318 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:57:08,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:08,341 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-08-30 17:57:08,342 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:57:08,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-08-30 17:57:08,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:08,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:08,344 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:57:08,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:08,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:08,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:08,358 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-08-30 17:57:08,358 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:57:08,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-08-30 17:57:08,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 10168 [2023-08-30 17:57:09,976 INFO L134 LiptonReduction]: Checked pairs total: 31064 [2023-08-30 17:57:09,977 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-30 17:57:09,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:57:09,979 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;@2ee1c0cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:57:09,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:57:09,980 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-08-30 17:57:09,980 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:09,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:09,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:57:09,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:57:09,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:09,981 INFO L85 PathProgramCache]: Analyzing trace with hash 807875875, now seen corresponding path program 1 times [2023-08-30 17:57:09,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:09,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747148822] [2023-08-30 17:57:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:09,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:10,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:10,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747148822] [2023-08-30 17:57:10,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747148822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:57:10,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:57:10,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:57:10,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988242526] [2023-08-30 17:57:10,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:57:10,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:57:10,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:57:10,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:57:10,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 260 [2023-08-30 17:57:10,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:10,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 260 [2023-08-30 17:57:10,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:10,300 INFO L130 PetriNetUnfolder]: 2666/4603 cut-off events. [2023-08-30 17:57:10,300 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-08-30 17:57:10,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8797 conditions, 4603 events. 2666/4603 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 29730 event pairs, 1116 based on Foata normal form. 1005/5140 useless extension candidates. Maximal degree in co-relation 1325. Up to 4118 conditions per place. [2023-08-30 17:57:10,312 INFO L137 encePairwiseOnDemand]: 237/260 looper letters, 39 selfloop transitions, 2 changer transitions 10/69 dead transitions. [2023-08-30 17:57:10,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 254 flow [2023-08-30 17:57:10,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:57:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:57:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-30 17:57:10,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782051282051283 [2023-08-30 17:57:10,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-30 17:57:10,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-30 17:57:10,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:10,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-30 17:57:10,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,317 INFO L175 Difference]: Start difference. First operand has 60 places, 79 transitions, 176 flow. Second operand 3 states and 451 transitions. [2023-08-30 17:57:10,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 254 flow [2023-08-30 17:57:10,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:57:10,321 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 118 flow [2023-08-30 17:57:10,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-08-30 17:57:10,322 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-30 17:57:10,322 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 118 flow [2023-08-30 17:57:10,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:10,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:57:10,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:57:10,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:57:10,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash -221747516, now seen corresponding path program 1 times [2023-08-30 17:57:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:10,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075376278] [2023-08-30 17:57:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:10,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:10,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075376278] [2023-08-30 17:57:10,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075376278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:57:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752347416] [2023-08-30 17:57:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:10,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:10,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:10,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:57:10,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 17:57:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:10,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:57:10,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:57:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:10,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:57:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:10,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752347416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:57:10,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:57:10,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 17:57:10,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010808044] [2023-08-30 17:57:10,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:57:10,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 17:57:10,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 17:57:10,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 17:57:10,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 260 [2023-08-30 17:57:10,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 126.83333333333333) internal successors, (761), 6 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:10,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 260 [2023-08-30 17:57:10,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:10,557 INFO L130 PetriNetUnfolder]: 425/737 cut-off events. [2023-08-30 17:57:10,557 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2023-08-30 17:57:10,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 737 events. 425/737 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3499 event pairs, 55 based on Foata normal form. 88/784 useless extension candidates. Maximal degree in co-relation 1181. Up to 480 conditions per place. [2023-08-30 17:57:10,589 INFO L137 encePairwiseOnDemand]: 257/260 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-08-30 17:57:10,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 65 transitions, 250 flow [2023-08-30 17:57:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:57:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:57:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 674 transitions. [2023-08-30 17:57:10,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5184615384615384 [2023-08-30 17:57:10,591 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 674 transitions. [2023-08-30 17:57:10,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 674 transitions. [2023-08-30 17:57:10,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:10,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 674 transitions. [2023-08-30 17:57:10,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,595 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,595 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 118 flow. Second operand 5 states and 674 transitions. [2023-08-30 17:57:10,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 65 transitions, 250 flow [2023-08-30 17:57:10,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:57:10,596 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-30 17:57:10,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-30 17:57:10,597 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -15 predicate places. [2023-08-30 17:57:10,597 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-30 17:57:10,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.83333333333333) internal successors, (761), 6 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:10,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:57:10,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 17:57:10,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:10,804 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:57:10,804 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:57:10,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:10,817 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-08-30 17:57:10,818 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:57:10,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-08-30 17:57:10,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:10,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:10,820 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:57:10,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:10,820 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:10,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-08-30 17:57:10,832 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-08-30 17:57:10,832 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:57:10,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-08-30 17:57:10,837 INFO L119 LiptonReduction]: Number of co-enabled transitions 10168 [2023-08-30 17:57:12,396 INFO L134 LiptonReduction]: Checked pairs total: 31705 [2023-08-30 17:57:12,397 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-30 17:57:12,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:57:12,398 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;@2ee1c0cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:57:12,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:57:12,401 INFO L130 PetriNetUnfolder]: 24/93 cut-off events. [2023-08-30 17:57:12,402 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:57:12,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:12,402 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:57:12,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:57:12,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 25944173, now seen corresponding path program 1 times [2023-08-30 17:57:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:12,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685666637] [2023-08-30 17:57:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:57:12,429 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:57:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:57:12,448 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:57:12,451 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:57:12,451 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:57:12,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:57:12,451 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:57:12,452 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:57:12,452 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:57:12,452 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:57:12,472 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:57:12,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:12,498 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-08-30 17:57:12,498 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:57:12,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-08-30 17:57:12,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:12,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:12,503 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:57:12,503 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:12,503 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:12,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:12,529 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-08-30 17:57:12,529 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:57:12,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-08-30 17:57:12,539 INFO L119 LiptonReduction]: Number of co-enabled transitions 18414 [2023-08-30 17:57:14,256 INFO L134 LiptonReduction]: Checked pairs total: 62844 [2023-08-30 17:57:14,256 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-30 17:57:14,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:57:14,257 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;@2ee1c0cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:57:14,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:57:14,259 INFO L130 PetriNetUnfolder]: 3/20 cut-off events. [2023-08-30 17:57:14,259 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:14,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:14,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:57:14,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:57:14,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1225794169, now seen corresponding path program 1 times [2023-08-30 17:57:14,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:14,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711198475] [2023-08-30 17:57:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:14,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:14,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:14,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711198475] [2023-08-30 17:57:14,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711198475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:57:14,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:57:14,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:57:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068202611] [2023-08-30 17:57:14,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:57:14,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:57:14,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:57:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:57:14,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 305 [2023-08-30 17:57:14,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 104 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:14,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:14,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 305 [2023-08-30 17:57:14,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:17,097 INFO L130 PetriNetUnfolder]: 32568/47603 cut-off events. [2023-08-30 17:57:17,098 INFO L131 PetriNetUnfolder]: For 793/793 co-relation queries the response was YES. [2023-08-30 17:57:17,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92547 conditions, 47603 events. 32568/47603 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 347303 event pairs, 25645 based on Foata normal form. 9143/53063 useless extension candidates. Maximal degree in co-relation 14872. Up to 44296 conditions per place. [2023-08-30 17:57:17,248 INFO L137 encePairwiseOnDemand]: 275/305 looper letters, 47 selfloop transitions, 2 changer transitions 12/87 dead transitions. [2023-08-30 17:57:17,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 322 flow [2023-08-30 17:57:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:57:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:57:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-08-30 17:57:17,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934426229508196 [2023-08-30 17:57:17,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-08-30 17:57:17,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-08-30 17:57:17,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:17,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-08-30 17:57:17,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:17,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:17,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:17,254 INFO L175 Difference]: Start difference. First operand has 78 places, 104 transitions, 238 flow. Second operand 3 states and 543 transitions. [2023-08-30 17:57:17,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 322 flow [2023-08-30 17:57:17,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:57:17,258 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 157 flow [2023-08-30 17:57:17,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2023-08-30 17:57:17,259 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-08-30 17:57:17,259 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 157 flow [2023-08-30 17:57:17,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:17,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:17,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:57:17,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:57:17,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:57:17,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1812463824, now seen corresponding path program 1 times [2023-08-30 17:57:17,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:17,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125557271] [2023-08-30 17:57:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:17,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:17,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125557271] [2023-08-30 17:57:17,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125557271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:57:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107054634] [2023-08-30 17:57:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:17,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:17,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:57:17,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:57:17,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 17:57:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:57:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:57:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:17,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:57:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:17,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107054634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:57:17,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:57:17,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:57:17,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378904484] [2023-08-30 17:57:17,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:57:17,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:57:17,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:57:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:57:17,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 305 [2023-08-30 17:57:17,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 157 flow. Second operand has 7 states, 7 states have (on average 152.0) internal successors, (1064), 7 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:17,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:17,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 305 [2023-08-30 17:57:17,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:57:17,877 INFO L130 PetriNetUnfolder]: 5017/7667 cut-off events. [2023-08-30 17:57:17,877 INFO L131 PetriNetUnfolder]: For 1344/1344 co-relation queries the response was YES. [2023-08-30 17:57:17,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15576 conditions, 7667 events. 5017/7667 cut-off events. For 1344/1344 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 47581 event pairs, 784 based on Foata normal form. 648/8136 useless extension candidates. Maximal degree in co-relation 2426. Up to 4608 conditions per place. [2023-08-30 17:57:17,888 INFO L137 encePairwiseOnDemand]: 302/305 looper letters, 0 selfloop transitions, 0 changer transitions 106/106 dead transitions. [2023-08-30 17:57:17,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 106 transitions, 407 flow [2023-08-30 17:57:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:57:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:57:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 982 transitions. [2023-08-30 17:57:17,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366120218579234 [2023-08-30 17:57:17,889 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 982 transitions. [2023-08-30 17:57:17,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 982 transitions. [2023-08-30 17:57:17,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:57:17,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 982 transitions. [2023-08-30 17:57:17,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.66666666666666) internal successors, (982), 6 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:17,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:17,893 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:17,893 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 157 flow. Second operand 6 states and 982 transitions. [2023-08-30 17:57:17,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 106 transitions, 407 flow [2023-08-30 17:57:17,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 106 transitions, 403 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:57:17,895 INFO L231 Difference]: Finished difference. Result has 63 places, 0 transitions, 0 flow [2023-08-30 17:57:17,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=63, PETRI_TRANSITIONS=0} [2023-08-30 17:57:17,895 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -15 predicate places. [2023-08-30 17:57:17,895 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 0 transitions, 0 flow [2023-08-30 17:57:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.0) internal successors, (1064), 7 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:17,896 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:57:17,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 17:57:18,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:57:18,100 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:57:18,101 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:57:18,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:18,128 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-08-30 17:57:18,128 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:57:18,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-08-30 17:57:18,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:18,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:18,132 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:57:18,132 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:18,132 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:18,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-08-30 17:57:18,153 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-08-30 17:57:18,154 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:57:18,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-08-30 17:57:18,159 INFO L119 LiptonReduction]: Number of co-enabled transitions 18414 [2023-08-30 17:57:19,800 INFO L134 LiptonReduction]: Checked pairs total: 61724 [2023-08-30 17:57:19,800 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-30 17:57:19,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:57:19,806 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;@2ee1c0cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:57:19,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:57:19,812 INFO L130 PetriNetUnfolder]: 38/143 cut-off events. [2023-08-30 17:57:19,812 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:57:19,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:19,812 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:57:19,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:57:19,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:19,813 INFO L85 PathProgramCache]: Analyzing trace with hash 760311120, now seen corresponding path program 1 times [2023-08-30 17:57:19,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:19,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187690741] [2023-08-30 17:57:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:19,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:57:19,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:57:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:57:19,841 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:57:19,841 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:57:19,841 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:57:19,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:57:19,841 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:57:19,843 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:57:19,843 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:57:19,843 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:57:19,861 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:57:19,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-08-30 17:57:19,902 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-08-30 17:57:19,902 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:57:19,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-08-30 17:57:19,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 223 transitions, 490 flow [2023-08-30 17:57:19,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 223 transitions, 490 flow [2023-08-30 17:57:19,915 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:57:19,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 223 transitions, 490 flow [2023-08-30 17:57:19,915 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 223 transitions, 490 flow [2023-08-30 17:57:19,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-08-30 17:57:19,951 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-08-30 17:57:19,951 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:57:19,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-08-30 17:57:19,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 28768 [2023-08-30 17:57:21,722 INFO L134 LiptonReduction]: Checked pairs total: 102939 [2023-08-30 17:57:21,722 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-30 17:57:21,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:57:21,724 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;@2ee1c0cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:57:21,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:57:21,725 INFO L130 PetriNetUnfolder]: 3/20 cut-off events. [2023-08-30 17:57:21,725 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:57:21,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:57:21,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:57:21,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:57:21,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:57:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1709569950, now seen corresponding path program 1 times [2023-08-30 17:57:21,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:57:21,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721452049] [2023-08-30 17:57:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:57:21,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:57:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:57:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:57:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:57:21,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721452049] [2023-08-30 17:57:21,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721452049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:57:21,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:57:21,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:57:21,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832206264] [2023-08-30 17:57:21,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:57:21,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:57:21,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:57:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:57:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:57:21,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 356 [2023-08-30 17:57:21,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 127 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:57:21,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:57:21,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 356 [2023-08-30 17:57:21,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:58:06,652 INFO L130 PetriNetUnfolder]: 616819/834191 cut-off events. [2023-08-30 17:58:06,652 INFO L131 PetriNetUnfolder]: For 17980/17980 co-relation queries the response was YES. [2023-08-30 17:58:08,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1625862 conditions, 834191 events. 616819/834191 cut-off events. For 17980/17980 co-relation queries the response was YES. Maximal size of possible extension queue 18006. Compared 6728304 event pairs, 410065 based on Foata normal form. 128474/880263 useless extension candidates. Maximal degree in co-relation 158145. Up to 780955 conditions per place. [2023-08-30 17:58:10,029 INFO L137 encePairwiseOnDemand]: 320/356 looper letters, 61 selfloop transitions, 2 changer transitions 13/104 dead transitions. [2023-08-30 17:58:10,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 104 transitions, 400 flow [2023-08-30 17:58:10,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:58:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:58:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-30 17:58:10,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.598314606741573 [2023-08-30 17:58:10,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-30 17:58:10,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-30 17:58:10,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:58:10,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-30 17:58:10,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:10,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:10,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:10,035 INFO L175 Difference]: Start difference. First operand has 95 places, 127 transitions, 298 flow. Second operand 3 states and 639 transitions. [2023-08-30 17:58:10,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 104 transitions, 400 flow [2023-08-30 17:58:10,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:58:10,039 INFO L231 Difference]: Finished difference. Result has 98 places, 82 transitions, 198 flow [2023-08-30 17:58:10,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=98, PETRI_TRANSITIONS=82} [2023-08-30 17:58:10,040 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 3 predicate places. [2023-08-30 17:58:10,040 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 82 transitions, 198 flow [2023-08-30 17:58:10,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:10,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:58:10,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:58:10,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:58:10,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:58:10,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:58:10,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1428102937, now seen corresponding path program 1 times [2023-08-30 17:58:10,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:58:10,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207350151] [2023-08-30 17:58:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:58:10,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:58:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:58:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:58:10,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:58:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207350151] [2023-08-30 17:58:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207350151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:58:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986886883] [2023-08-30 17:58:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:58:10,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:58:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:58:10,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:58:10,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 17:58:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:58:10,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:58:10,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:58:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:58:10,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:58:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:58:10,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986886883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:58:10,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:58:10,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:58:10,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098865312] [2023-08-30 17:58:10,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:58:10,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:58:10,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:58:10,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:58:10,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:58:10,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 356 [2023-08-30 17:58:10,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 82 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:10,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:58:10,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 356 [2023-08-30 17:58:10,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:58:35,666 INFO L130 PetriNetUnfolder]: 349033/488944 cut-off events. [2023-08-30 17:58:35,667 INFO L131 PetriNetUnfolder]: For 16307/16307 co-relation queries the response was YES. [2023-08-30 17:58:36,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949638 conditions, 488944 events. 349033/488944 cut-off events. For 16307/16307 co-relation queries the response was YES. Maximal size of possible extension queue 11884. Compared 4090085 event pairs, 15460 based on Foata normal form. 976/470459 useless extension candidates. Maximal degree in co-relation 734689. Up to 356401 conditions per place. [2023-08-30 17:58:38,331 INFO L137 encePairwiseOnDemand]: 352/356 looper letters, 148 selfloop transitions, 5 changer transitions 1/182 dead transitions. [2023-08-30 17:58:38,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 182 transitions, 710 flow [2023-08-30 17:58:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:58:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:58:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1201 transitions. [2023-08-30 17:58:38,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622659176029963 [2023-08-30 17:58:38,334 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1201 transitions. [2023-08-30 17:58:38,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1201 transitions. [2023-08-30 17:58:38,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:58:38,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1201 transitions. [2023-08-30 17:58:38,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 200.16666666666666) internal successors, (1201), 6 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:38,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:38,339 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:38,339 INFO L175 Difference]: Start difference. First operand has 98 places, 82 transitions, 198 flow. Second operand 6 states and 1201 transitions. [2023-08-30 17:58:38,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 182 transitions, 710 flow [2023-08-30 17:58:38,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 182 transitions, 702 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 17:58:38,344 INFO L231 Difference]: Finished difference. Result has 97 places, 84 transitions, 224 flow [2023-08-30 17:58:38,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=97, PETRI_TRANSITIONS=84} [2023-08-30 17:58:38,344 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 2 predicate places. [2023-08-30 17:58:38,345 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 84 transitions, 224 flow [2023-08-30 17:58:38,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:38,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:58:38,345 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:58:38,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 17:58:38,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:58:38,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:58:38,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:58:38,550 INFO L85 PathProgramCache]: Analyzing trace with hash 69879322, now seen corresponding path program 1 times [2023-08-30 17:58:38,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:58:38,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104111593] [2023-08-30 17:58:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:58:38,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:58:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:58:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:58:38,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:58:38,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104111593] [2023-08-30 17:58:38,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104111593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:58:38,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776411554] [2023-08-30 17:58:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:58:38,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:58:38,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:58:38,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:58:38,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 17:58:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:58:38,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:58:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:58:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:58:38,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:58:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:58:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776411554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:58:38,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:58:38,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 17:58:38,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576302193] [2023-08-30 17:58:38,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:58:38,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 17:58:38,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:58:38,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 17:58:38,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 17:58:38,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 356 [2023-08-30 17:58:38,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 84 transitions, 224 flow. Second operand has 13 states, 13 states have (on average 177.0) internal successors, (2301), 13 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:38,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:58:38,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 356 [2023-08-30 17:58:38,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:58:43,399 INFO L130 PetriNetUnfolder]: 63913/90304 cut-off events. [2023-08-30 17:58:43,399 INFO L131 PetriNetUnfolder]: For 110947/110947 co-relation queries the response was YES. [2023-08-30 17:58:43,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203588 conditions, 90304 events. 63913/90304 cut-off events. For 110947/110947 co-relation queries the response was YES. Maximal size of possible extension queue 2577. Compared 652864 event pairs, 4460 based on Foata normal form. 7920/93691 useless extension candidates. Maximal degree in co-relation 101704. Up to 39600 conditions per place. [2023-08-30 17:58:43,635 INFO L137 encePairwiseOnDemand]: 353/356 looper letters, 0 selfloop transitions, 0 changer transitions 168/168 dead transitions. [2023-08-30 17:58:43,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 168 transitions, 680 flow [2023-08-30 17:58:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:58:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:58:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1364 transitions. [2023-08-30 17:58:43,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473515248796148 [2023-08-30 17:58:43,638 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1364 transitions. [2023-08-30 17:58:43,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1364 transitions. [2023-08-30 17:58:43,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:58:43,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1364 transitions. [2023-08-30 17:58:43,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 194.85714285714286) internal successors, (1364), 7 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:43,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:43,643 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:43,644 INFO L175 Difference]: Start difference. First operand has 97 places, 84 transitions, 224 flow. Second operand 7 states and 1364 transitions. [2023-08-30 17:58:43,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 168 transitions, 680 flow [2023-08-30 17:58:43,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 168 transitions, 661 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 17:58:43,726 INFO L231 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2023-08-30 17:58:43,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2023-08-30 17:58:43,726 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -12 predicate places. [2023-08-30 17:58:43,726 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2023-08-30 17:58:43,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 177.0) internal successors, (2301), 13 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:43,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:58:43,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 17:58:43,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 17:58:43,928 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:58:43,928 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:58:43,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-08-30 17:58:43,964 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-08-30 17:58:43,964 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:58:43,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-08-30 17:58:43,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 223 transitions, 490 flow [2023-08-30 17:58:43,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 223 transitions, 490 flow [2023-08-30 17:58:43,969 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:58:43,969 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 223 transitions, 490 flow [2023-08-30 17:58:43,969 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 223 transitions, 490 flow [2023-08-30 17:58:43,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-08-30 17:58:44,003 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-08-30 17:58:44,004 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:58:44,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-08-30 17:58:44,015 INFO L119 LiptonReduction]: Number of co-enabled transitions 28768 [2023-08-30 17:58:45,688 INFO L134 LiptonReduction]: Checked pairs total: 101199 [2023-08-30 17:58:45,688 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-30 17:58:45,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:58:45,689 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;@2ee1c0cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:58:45,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:58:45,696 INFO L130 PetriNetUnfolder]: 54/200 cut-off events. [2023-08-30 17:58:45,697 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 17:58:45,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:58:45,697 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:58:45,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:58:45,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:58:45,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1281142070, now seen corresponding path program 1 times [2023-08-30 17:58:45,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:58:45,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180790593] [2023-08-30 17:58:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:58:45,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:58:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:58:45,718 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:58:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:58:45,726 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:58:45,726 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:58:45,726 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:58:45,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 17:58:45,726 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:58:45,726 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:58:45,727 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:58:45,727 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:58:45,745 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:58:45,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 256 transitions, 572 flow [2023-08-30 17:58:45,813 INFO L130 PetriNetUnfolder]: 181/980 cut-off events. [2023-08-30 17:58:45,813 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:58:45,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 980 events. 181/980 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4483 event pairs, 23 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 686. Up to 80 conditions per place. [2023-08-30 17:58:45,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 256 transitions, 572 flow [2023-08-30 17:58:45,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 256 transitions, 572 flow [2023-08-30 17:58:45,823 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:58:45,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 256 transitions, 572 flow [2023-08-30 17:58:45,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 256 transitions, 572 flow [2023-08-30 17:58:45,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 256 transitions, 572 flow [2023-08-30 17:58:45,889 INFO L130 PetriNetUnfolder]: 181/980 cut-off events. [2023-08-30 17:58:45,890 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:58:45,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 980 events. 181/980 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4483 event pairs, 23 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 686. Up to 80 conditions per place. [2023-08-30 17:58:46,034 INFO L119 LiptonReduction]: Number of co-enabled transitions 41230 [2023-08-30 17:58:47,857 INFO L134 LiptonReduction]: Checked pairs total: 168973 [2023-08-30 17:58:47,858 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-30 17:58:47,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:58:47,865 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;@2ee1c0cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:58:47,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:58:47,866 INFO L130 PetriNetUnfolder]: 3/20 cut-off events. [2023-08-30 17:58:47,866 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:58:47,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:58:47,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:58:47,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:58:47,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:58:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2037735863, now seen corresponding path program 1 times [2023-08-30 17:58:47,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:58:47,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925567718] [2023-08-30 17:58:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:58:47,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:58:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:58:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:58:47,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:58:47,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925567718] [2023-08-30 17:58:47,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925567718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:58:47,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:58:47,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:58:47,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742200865] [2023-08-30 17:58:47,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:58:47,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:58:47,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:58:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:58:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:58:47,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 405 [2023-08-30 17:58:47,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:58:47,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:58:47,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 405 [2023-08-30 17:58:47,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand