./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/pthread-wmm/safe030_tso.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 1730fa7f98e17ee8b58920ef3daf63ee88225f1b42924032a532b5f5db33fba5 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:58:51,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:58:51,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:58:51,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:58:51,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:58:51,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:58:51,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:58:51,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:58:51,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:58:51,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:58:51,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:58:51,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:58:51,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:58:51,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:58:51,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:58:51,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:58:51,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:58:51,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:58:51,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:58:51,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:58:51,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:58:51,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:58:51,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:58:51,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:58:51,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:58:51,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:58:51,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:58:51,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:58:51,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:58:51,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:58:51,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:58:51,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:58:51,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:58:51,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:58:51,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:58:51,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:58:51,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:58:51,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:58:51,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:58:51,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:58:51,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:58:51,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:58:51,509 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:58:51,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:58:51,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:58:51,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:58:51,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:58:51,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:58:51,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:58:51,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:58:51,513 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:58:51,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:58:51,514 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:58:51,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:58:51,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:58:51,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:58:51,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:58:51,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:58:51,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:58:51,515 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:58:51,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:58:51,515 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:58:51,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:58:51,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:58:51,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:58:51,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:58:51,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:58:51,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:58:51,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:58:51,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:58:51,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:58:51,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:58:51,518 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:58:51,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:58:51,518 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:58:51,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:58:51,519 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:58:51,519 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1730fa7f98e17ee8b58920ef3daf63ee88225f1b42924032a532b5f5db33fba5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:58:51,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:58:51,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:58:51,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:58:51,850 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:58:51,851 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:58:51,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2023-09-01 09:58:53,112 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:58:53,412 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:58:53,416 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2023-09-01 09:58:53,443 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2d68cfc/50aef8165c174c209078c6d4ae217bde/FLAG8b0af525d [2023-09-01 09:58:53,522 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2d68cfc/50aef8165c174c209078c6d4ae217bde [2023-09-01 09:58:53,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:58:53,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:58:53,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:58:53,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:58:53,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:58:53,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:53,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83f2c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53, skipping insertion in model container [2023-09-01 09:58:53,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:53,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:58:53,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:58:53,709 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i[945,958] [2023-09-01 09:58:53,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:58:53,892 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:58:53,905 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i[945,958] [2023-09-01 09:58:53,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:58:53,984 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:58:53,984 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:58:53,990 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:58:53,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53 WrapperNode [2023-09-01 09:58:53,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:58:53,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:58:53,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:58:53,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:58:53,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,054 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2023-09-01 09:58:54,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:58:54,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:58:54,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:58:54,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:58:54,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,091 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:58:54,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:58:54,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:58:54,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:58:54,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (1/1) ... [2023-09-01 09:58:54,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:58:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:58:54,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 09:58:54,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 09:58:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:58:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 09:58:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:58:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:58:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:58:54,170 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-09-01 09:58:54,170 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-09-01 09:58:54,170 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-09-01 09:58:54,170 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-09-01 09:58:54,170 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-09-01 09:58:54,170 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-09-01 09:58:54,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:58:54,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 09:58:54,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:58:54,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:58:54,172 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 09:58:54,362 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:58:54,364 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:58:54,543 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:58:54,553 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:58:54,553 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-09-01 09:58:54,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:58:54 BoogieIcfgContainer [2023-09-01 09:58:54,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:58:54,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:58:54,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:58:54,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:58:54,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:58:53" (1/3) ... [2023-09-01 09:58:54,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@890113c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:58:54, skipping insertion in model container [2023-09-01 09:58:54,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:58:53" (2/3) ... [2023-09-01 09:58:54,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@890113c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:58:54, skipping insertion in model container [2023-09-01 09:58:54,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:58:54" (3/3) ... [2023-09-01 09:58:54,562 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_tso.i [2023-09-01 09:58:54,569 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:58:54,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:58:54,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:58:54,578 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:58:54,621 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:58:54,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 83 transitions, 181 flow [2023-09-01 09:58:54,703 INFO L130 PetriNetUnfolder]: 2/80 cut-off events. [2023-09-01 09:58:54,704 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:58:54,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 80 events. 2/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-09-01 09:58:54,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 83 transitions, 181 flow [2023-09-01 09:58:54,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 68 transitions, 145 flow [2023-09-01 09:58:54,715 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:58:54,724 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 68 transitions, 145 flow [2023-09-01 09:58:54,726 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 68 transitions, 145 flow [2023-09-01 09:58:54,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 68 transitions, 145 flow [2023-09-01 09:58:54,747 INFO L130 PetriNetUnfolder]: 1/68 cut-off events. [2023-09-01 09:58:54,748 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:58:54,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 68 events. 1/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-09-01 09:58:54,750 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044 [2023-09-01 09:58:56,690 INFO L134 LiptonReduction]: Checked pairs total: 2020 [2023-09-01 09:58:56,690 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-09-01 09:58:56,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 09:58:56,721 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;@665dff98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:58:56,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 09:58:56,733 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2023-09-01 09:58:56,733 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:58:56,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:56,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:56,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:56,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:56,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1680897214, now seen corresponding path program 1 times [2023-09-01 09:58:56,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:56,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431582567] [2023-09-01 09:58:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:57,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:57,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431582567] [2023-09-01 09:58:57,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431582567] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:57,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:57,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 09:58:57,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165840906] [2023-09-01 09:58:57,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:58:57,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:58:57,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:58:57,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:58:57,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:57,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:58:57,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:57,486 INFO L130 PetriNetUnfolder]: 553/883 cut-off events. [2023-09-01 09:58:57,486 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 09:58:57,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 883 events. 553/883 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3738 event pairs, 267 based on Foata normal form. 57/940 useless extension candidates. Maximal degree in co-relation 1810. Up to 531 conditions per place. [2023-09-01 09:58:57,498 INFO L137 encePairwiseOnDemand]: 130/139 looper letters, 24 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2023-09-01 09:58:57,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 31 transitions, 139 flow [2023-09-01 09:58:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:58:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:58:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2023-09-01 09:58:57,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707434052757794 [2023-09-01 09:58:57,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2023-09-01 09:58:57,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2023-09-01 09:58:57,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:57,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2023-09-01 09:58:57,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,535 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 3 states and 238 transitions. [2023-09-01 09:58:57,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 31 transitions, 139 flow [2023-09-01 09:58:57,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 09:58:57,553 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 94 flow [2023-09-01 09:58:57,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-09-01 09:58:57,561 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-09-01 09:58:57,562 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 94 flow [2023-09-01 09:58:57,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:57,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:57,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:58:57,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:57,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:57,576 INFO L85 PathProgramCache]: Analyzing trace with hash -568206550, now seen corresponding path program 1 times [2023-09-01 09:58:57,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:57,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618420366] [2023-09-01 09:58:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:57,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:57,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:57,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618420366] [2023-09-01 09:58:57,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618420366] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:57,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:57,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:58:57,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229628117] [2023-09-01 09:58:57,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:57,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:57,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:57,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:58:57,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:57,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:58:57,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:57,904 INFO L130 PetriNetUnfolder]: 527/844 cut-off events. [2023-09-01 09:58:57,904 INFO L131 PetriNetUnfolder]: For 378/378 co-relation queries the response was YES. [2023-09-01 09:58:57,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 844 events. 527/844 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3462 event pairs, 77 based on Foata normal form. 5/849 useless extension candidates. Maximal degree in co-relation 2480. Up to 474 conditions per place. [2023-09-01 09:58:57,909 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 31 selfloop transitions, 11 changer transitions 0/42 dead transitions. [2023-09-01 09:58:57,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 42 transitions, 248 flow [2023-09-01 09:58:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:58:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:58:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-09-01 09:58:57,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5593525179856115 [2023-09-01 09:58:57,915 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-09-01 09:58:57,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-09-01 09:58:57,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:57,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-09-01 09:58:57,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,921 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 94 flow. Second operand 4 states and 311 transitions. [2023-09-01 09:58:57,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 42 transitions, 248 flow [2023-09-01 09:58:57,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 42 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 09:58:57,928 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 164 flow [2023-09-01 09:58:57,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-09-01 09:58:57,929 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-09-01 09:58:57,929 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 164 flow [2023-09-01 09:58:57,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:57,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:57,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:57,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:58:57,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:57,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash -568207201, now seen corresponding path program 1 times [2023-09-01 09:58:57,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:57,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12057561] [2023-09-01 09:58:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:57,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:58,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:58,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12057561] [2023-09-01 09:58:58,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12057561] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:58,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:58,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:58:58,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694443230] [2023-09-01 09:58:58,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:58,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:58,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:58,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:58,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:58,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:58:58,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:58,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:58:58,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:58,256 INFO L130 PetriNetUnfolder]: 507/814 cut-off events. [2023-09-01 09:58:58,257 INFO L131 PetriNetUnfolder]: For 689/689 co-relation queries the response was YES. [2023-09-01 09:58:58,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2727 conditions, 814 events. 507/814 cut-off events. For 689/689 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3334 event pairs, 87 based on Foata normal form. 4/818 useless extension candidates. Maximal degree in co-relation 2712. Up to 486 conditions per place. [2023-09-01 09:58:58,263 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 36 selfloop transitions, 17 changer transitions 0/53 dead transitions. [2023-09-01 09:58:58,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 372 flow [2023-09-01 09:58:58,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:58:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:58:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 313 transitions. [2023-09-01 09:58:58,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5629496402877698 [2023-09-01 09:58:58,266 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 313 transitions. [2023-09-01 09:58:58,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 313 transitions. [2023-09-01 09:58:58,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:58,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 313 transitions. [2023-09-01 09:58:58,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,269 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,269 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 164 flow. Second operand 4 states and 313 transitions. [2023-09-01 09:58:58,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 372 flow [2023-09-01 09:58:58,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 53 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:58:58,274 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 304 flow [2023-09-01 09:58:58,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-09-01 09:58:58,275 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2023-09-01 09:58:58,275 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 304 flow [2023-09-01 09:58:58,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:58,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:58,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:58:58,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:58,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash -434535946, now seen corresponding path program 1 times [2023-09-01 09:58:58,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:58,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966300701] [2023-09-01 09:58:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:58,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:58,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:58,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966300701] [2023-09-01 09:58:58,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966300701] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:58,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:58,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:58:58,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342823320] [2023-09-01 09:58:58,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:58,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:58,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:58,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:58:58,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:58,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:58:58,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:58,601 INFO L130 PetriNetUnfolder]: 493/793 cut-off events. [2023-09-01 09:58:58,602 INFO L131 PetriNetUnfolder]: For 1703/1703 co-relation queries the response was YES. [2023-09-01 09:58:58,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3226 conditions, 793 events. 493/793 cut-off events. For 1703/1703 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3208 event pairs, 81 based on Foata normal form. 3/796 useless extension candidates. Maximal degree in co-relation 3206. Up to 468 conditions per place. [2023-09-01 09:58:58,609 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 41 selfloop transitions, 22 changer transitions 0/63 dead transitions. [2023-09-01 09:58:58,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 63 transitions, 560 flow [2023-09-01 09:58:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:58:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:58:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 315 transitions. [2023-09-01 09:58:58,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665467625899281 [2023-09-01 09:58:58,615 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 315 transitions. [2023-09-01 09:58:58,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 315 transitions. [2023-09-01 09:58:58,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:58,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 315 transitions. [2023-09-01 09:58:58,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,619 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,619 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 304 flow. Second operand 4 states and 315 transitions. [2023-09-01 09:58:58,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 63 transitions, 560 flow [2023-09-01 09:58:58,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 63 transitions, 560 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:58:58,627 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 482 flow [2023-09-01 09:58:58,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=482, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-09-01 09:58:58,629 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-09-01 09:58:58,629 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 482 flow [2023-09-01 09:58:58,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:58,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:58,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:58:58,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:58,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash -585709713, now seen corresponding path program 1 times [2023-09-01 09:58:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:58,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724803239] [2023-09-01 09:58:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:58,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:58,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724803239] [2023-09-01 09:58:58,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724803239] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:58,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:58,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:58:58,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285118162] [2023-09-01 09:58:58,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:58,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:58,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:58,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:58,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:58,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:58:58,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:58,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:58:58,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:58,954 INFO L130 PetriNetUnfolder]: 580/954 cut-off events. [2023-09-01 09:58:58,955 INFO L131 PetriNetUnfolder]: For 3686/3686 co-relation queries the response was YES. [2023-09-01 09:58:58,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4322 conditions, 954 events. 580/954 cut-off events. For 3686/3686 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4271 event pairs, 110 based on Foata normal form. 8/962 useless extension candidates. Maximal degree in co-relation 4297. Up to 360 conditions per place. [2023-09-01 09:58:58,960 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 39 selfloop transitions, 26 changer transitions 3/68 dead transitions. [2023-09-01 09:58:58,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 718 flow [2023-09-01 09:58:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:58:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:58:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2023-09-01 09:58:58,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683453237410072 [2023-09-01 09:58:58,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 316 transitions. [2023-09-01 09:58:58,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 316 transitions. [2023-09-01 09:58:58,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:58,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 316 transitions. [2023-09-01 09:58:58,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,965 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,965 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 482 flow. Second operand 4 states and 316 transitions. [2023-09-01 09:58:58,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 718 flow [2023-09-01 09:58:58,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 718 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:58:58,973 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 602 flow [2023-09-01 09:58:58,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=602, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-09-01 09:58:58,974 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-09-01 09:58:58,974 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 602 flow [2023-09-01 09:58:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:58,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:58,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:58,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:58:58,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:58,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:58,975 INFO L85 PathProgramCache]: Analyzing trace with hash -585664546, now seen corresponding path program 1 times [2023-09-01 09:58:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846922016] [2023-09-01 09:58:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:59,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:59,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846922016] [2023-09-01 09:58:59,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846922016] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:59,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:59,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:58:59,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468919125] [2023-09-01 09:58:59,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:59,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:58:59,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:58:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:58:59,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-09-01 09:58:59,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 602 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:59,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-09-01 09:58:59,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:59,162 INFO L130 PetriNetUnfolder]: 223/467 cut-off events. [2023-09-01 09:58:59,163 INFO L131 PetriNetUnfolder]: For 3864/3902 co-relation queries the response was YES. [2023-09-01 09:58:59,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2266 conditions, 467 events. 223/467 cut-off events. For 3864/3902 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2412 event pairs, 42 based on Foata normal form. 45/504 useless extension candidates. Maximal degree in co-relation 2236. Up to 331 conditions per place. [2023-09-01 09:58:59,167 INFO L137 encePairwiseOnDemand]: 134/139 looper letters, 48 selfloop transitions, 4 changer transitions 1/70 dead transitions. [2023-09-01 09:58:59,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 960 flow [2023-09-01 09:58:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:58:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:58:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-09-01 09:58:59,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851318944844125 [2023-09-01 09:58:59,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-09-01 09:58:59,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-09-01 09:58:59,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:59,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-09-01 09:58:59,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,171 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 602 flow. Second operand 3 states and 244 transitions. [2023-09-01 09:58:59,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 960 flow [2023-09-01 09:58:59,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 956 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-09-01 09:58:59,178 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 626 flow [2023-09-01 09:58:59,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=626, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-09-01 09:58:59,179 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2023-09-01 09:58:59,179 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 626 flow [2023-09-01 09:58:59,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:59,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:59,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:58:59,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:59,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:59,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1516080190, now seen corresponding path program 1 times [2023-09-01 09:58:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:59,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888802858] [2023-09-01 09:58:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:59,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:59,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:59,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888802858] [2023-09-01 09:58:59,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888802858] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:59,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:59,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:58:59,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671244386] [2023-09-01 09:58:59,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:59,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:59,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:59,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:59,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:58:59,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 626 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:59,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:58:59,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:59,426 INFO L130 PetriNetUnfolder]: 426/780 cut-off events. [2023-09-01 09:58:59,426 INFO L131 PetriNetUnfolder]: For 4896/4896 co-relation queries the response was YES. [2023-09-01 09:58:59,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4333 conditions, 780 events. 426/780 cut-off events. For 4896/4896 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3768 event pairs, 64 based on Foata normal form. 5/785 useless extension candidates. Maximal degree in co-relation 4300. Up to 375 conditions per place. [2023-09-01 09:58:59,431 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 45 selfloop transitions, 25 changer transitions 5/75 dead transitions. [2023-09-01 09:58:59,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 932 flow [2023-09-01 09:58:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:58:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:58:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2023-09-01 09:58:59,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564748201438849 [2023-09-01 09:58:59,434 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 314 transitions. [2023-09-01 09:58:59,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 314 transitions. [2023-09-01 09:58:59,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:59,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 314 transitions. [2023-09-01 09:58:59,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,436 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,436 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 626 flow. Second operand 4 states and 314 transitions. [2023-09-01 09:58:59,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 932 flow [2023-09-01 09:58:59,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 922 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:58:59,448 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 724 flow [2023-09-01 09:58:59,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=724, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-09-01 09:58:59,449 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2023-09-01 09:58:59,449 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 724 flow [2023-09-01 09:58:59,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:59,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:59,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:58:59,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:59,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:59,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2055244248, now seen corresponding path program 1 times [2023-09-01 09:58:59,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:59,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904507837] [2023-09-01 09:58:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:59,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:59,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:59,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904507837] [2023-09-01 09:58:59,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904507837] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:59,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:59,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:58:59,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806884424] [2023-09-01 09:58:59,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:59,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:59,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:59,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:59,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:59,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-09-01 09:58:59,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 724 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:59,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-09-01 09:58:59,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:58:59,733 INFO L130 PetriNetUnfolder]: 475/895 cut-off events. [2023-09-01 09:58:59,733 INFO L131 PetriNetUnfolder]: For 6778/6778 co-relation queries the response was YES. [2023-09-01 09:58:59,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5006 conditions, 895 events. 475/895 cut-off events. For 6778/6778 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4604 event pairs, 101 based on Foata normal form. 5/900 useless extension candidates. Maximal degree in co-relation 4969. Up to 490 conditions per place. [2023-09-01 09:58:59,739 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 40 selfloop transitions, 23 changer transitions 9/72 dead transitions. [2023-09-01 09:58:59,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 1028 flow [2023-09-01 09:58:59,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:58:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:58:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 312 transitions. [2023-09-01 09:58:59,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611510791366906 [2023-09-01 09:58:59,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 312 transitions. [2023-09-01 09:58:59,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 312 transitions. [2023-09-01 09:58:59,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:58:59,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 312 transitions. [2023-09-01 09:58:59,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,745 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,746 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 724 flow. Second operand 4 states and 312 transitions. [2023-09-01 09:58:59,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 1028 flow [2023-09-01 09:58:59,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 1004 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 09:58:59,762 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 660 flow [2023-09-01 09:58:59,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=660, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-09-01 09:58:59,765 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 34 predicate places. [2023-09-01 09:58:59,765 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 660 flow [2023-09-01 09:58:59,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:58:59,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:58:59,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:58:59,767 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:58:59,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:58:59,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1606064375, now seen corresponding path program 1 times [2023-09-01 09:58:59,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:58:59,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237391867] [2023-09-01 09:58:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:58:59,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:58:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:58:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:58:59,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:58:59,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237391867] [2023-09-01 09:58:59,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237391867] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:58:59,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:58:59,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:58:59,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836013647] [2023-09-01 09:58:59,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:58:59,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:58:59,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:58:59,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:58:59,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:58:59,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-09-01 09:58:59,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 660 flow. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:58:59,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:58:59,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-09-01 09:58:59,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:59:00,022 INFO L130 PetriNetUnfolder]: 155/380 cut-off events. [2023-09-01 09:59:00,024 INFO L131 PetriNetUnfolder]: For 3315/3399 co-relation queries the response was YES. [2023-09-01 09:59:00,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 380 events. 155/380 cut-off events. For 3315/3399 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2085 event pairs, 21 based on Foata normal form. 98/466 useless extension candidates. Maximal degree in co-relation 1964. Up to 219 conditions per place. [2023-09-01 09:59:00,027 INFO L137 encePairwiseOnDemand]: 134/139 looper letters, 34 selfloop transitions, 7 changer transitions 21/71 dead transitions. [2023-09-01 09:59:00,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 1148 flow [2023-09-01 09:59:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:59:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:59:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2023-09-01 09:59:00,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5845323741007195 [2023-09-01 09:59:00,029 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 325 transitions. [2023-09-01 09:59:00,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 325 transitions. [2023-09-01 09:59:00,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:59:00,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 325 transitions. [2023-09-01 09:59:00,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:59:00,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:59:00,032 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:59:00,032 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 660 flow. Second operand 4 states and 325 transitions. [2023-09-01 09:59:00,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 1148 flow [2023-09-01 09:59:00,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 1051 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 09:59:00,042 INFO L231 Difference]: Finished difference. Result has 62 places, 35 transitions, 505 flow [2023-09-01 09:59:00,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=505, PETRI_PLACES=62, PETRI_TRANSITIONS=35} [2023-09-01 09:59:00,044 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2023-09-01 09:59:00,044 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 35 transitions, 505 flow [2023-09-01 09:59:00,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:59:00,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:59:00,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:59:00,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:59:00,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 09:59:00,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:59:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1581674822, now seen corresponding path program 1 times [2023-09-01 09:59:00,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:59:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921421143] [2023-09-01 09:59:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:59:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:59:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:59:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:59:00,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:59:00,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921421143] [2023-09-01 09:59:00,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921421143] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:59:00,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:59:00,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:59:00,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007904222] [2023-09-01 09:59:00,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:59:00,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:59:00,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:59:00,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:59:00,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:59:00,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 139 [2023-09-01 09:59:00,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 35 transitions, 505 flow. Second operand has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:59:00,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:59:00,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 139 [2023-09-01 09:59:00,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:59:00,241 INFO L130 PetriNetUnfolder]: 54/140 cut-off events. [2023-09-01 09:59:00,241 INFO L131 PetriNetUnfolder]: For 1259/1303 co-relation queries the response was YES. [2023-09-01 09:59:00,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 140 events. 54/140 cut-off events. For 1259/1303 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 510 event pairs, 8 based on Foata normal form. 38/174 useless extension candidates. Maximal degree in co-relation 890. Up to 69 conditions per place. [2023-09-01 09:59:00,242 INFO L137 encePairwiseOnDemand]: 134/139 looper letters, 0 selfloop transitions, 0 changer transitions 49/49 dead transitions. [2023-09-01 09:59:00,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 49 transitions, 788 flow [2023-09-01 09:59:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 09:59:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 09:59:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 397 transitions. [2023-09-01 09:59:00,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5712230215827339 [2023-09-01 09:59:00,244 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 397 transitions. [2023-09-01 09:59:00,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 397 transitions. [2023-09-01 09:59:00,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:59:00,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 397 transitions. [2023-09-01 09:59:00,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:59:00,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:59:00,247 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:59:00,248 INFO L175 Difference]: Start difference. First operand has 62 places, 35 transitions, 505 flow. Second operand 5 states and 397 transitions. [2023-09-01 09:59:00,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 49 transitions, 788 flow [2023-09-01 09:59:00,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 598 flow, removed 3 selfloop flow, removed 13 redundant places. [2023-09-01 09:59:00,252 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-09-01 09:59:00,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-09-01 09:59:00,253 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2023-09-01 09:59:00,253 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-09-01 09:59:00,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:59:00,257 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-09-01 09:59:00,257 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-09-01 09:59:00,258 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-09-01 09:59:00,258 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-09-01 09:59:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:59:00,258 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:59:00,261 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 09:59:00,261 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 09:59:00,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 09:59:00 BasicIcfg [2023-09-01 09:59:00,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 09:59:00,265 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 09:59:00,265 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 09:59:00,265 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 09:59:00,266 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:58:54" (3/4) ... [2023-09-01 09:59:00,268 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 09:59:00,274 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2023-09-01 09:59:00,274 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2023-09-01 09:59:00,274 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2023-09-01 09:59:00,278 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-09-01 09:59:00,278 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 09:59:00,278 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 09:59:00,278 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 09:59:00,305 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 09:59:00,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 09:59:00,306 INFO L158 Benchmark]: Toolchain (without parser) took 6781.00ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 83.9MB in the beginning and 118.1MB in the end (delta: -34.2MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2023-09-01 09:59:00,306 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 71.3MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:59:00,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 465.33ms. Allocated memory is still 107.0MB. Free memory was 83.9MB in the beginning and 63.8MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-09-01 09:59:00,306 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.74ms. Allocated memory is still 107.0MB. Free memory was 63.8MB in the beginning and 61.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:59:00,307 INFO L158 Benchmark]: Boogie Preprocessor took 49.84ms. Allocated memory is still 107.0MB. Free memory was 61.7MB in the beginning and 60.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:59:00,307 INFO L158 Benchmark]: RCFGBuilder took 448.50ms. Allocated memory is still 107.0MB. Free memory was 60.3MB in the beginning and 77.8MB in the end (delta: -17.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 09:59:00,307 INFO L158 Benchmark]: TraceAbstraction took 5708.05ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 77.3MB in the beginning and 121.2MB in the end (delta: -44.0MB). Peak memory consumption was 88.9MB. Max. memory is 16.1GB. [2023-09-01 09:59:00,307 INFO L158 Benchmark]: Witness Printer took 40.02ms. Allocated memory is still 157.3MB. Free memory was 121.2MB in the beginning and 118.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:59:00,309 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 71.3MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 465.33ms. Allocated memory is still 107.0MB. Free memory was 83.9MB in the beginning and 63.8MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.74ms. Allocated memory is still 107.0MB. Free memory was 63.8MB in the beginning and 61.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.84ms. Allocated memory is still 107.0MB. Free memory was 61.7MB in the beginning and 60.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 448.50ms. Allocated memory is still 107.0MB. Free memory was 60.3MB in the beginning and 77.8MB in the end (delta: -17.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5708.05ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 77.3MB in the beginning and 121.2MB in the end (delta: -44.0MB). Peak memory consumption was 88.9MB. Max. memory is 16.1GB. * Witness Printer took 40.02ms. Allocated memory is still 157.3MB. Free memory was 121.2MB in the beginning and 118.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 77 PlacesBefore, 27 PlacesAfterwards, 68 TransitionsBefore, 18 TransitionsAfterwards, 1044 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 0 ChoiceCompositions, 56 TotalNumberOfCompositions, 2020 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1056, independent: 975, independent conditional: 0, independent unconditional: 975, dependent: 81, dependent conditional: 0, dependent unconditional: 81, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 578, independent: 555, independent conditional: 0, independent unconditional: 555, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1056, independent: 420, independent conditional: 0, independent unconditional: 420, dependent: 58, dependent conditional: 0, dependent unconditional: 58, unknown: 578, unknown conditional: 0, unknown unconditional: 578] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 41, Positive conditional cache size: 0, Positive unconditional cache size: 41, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 106 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.6s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 252 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 157 mSDsluCounter, 88 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 36 mSDsCounter, 70 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 466 IncrementalHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 70 mSolverCounterUnsat, 52 mSDtfsCounter, 466 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=724occurred in iteration=7, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 414 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 09:59:00,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE